SVL300-Model 39

123456Fire Protection Equipment

#SVL300 - Model 39 Dry Pipe Valves

"Automatic" Sprinkler 150 Gordon Drive Exton, PA 19341 USA Tel: (610) 363-1400 800-626-2682 Fax: (610) 524-9073 800-858-6857

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TABLE OF CONTENTSText Page

General ................................................................................................................................................................... 1 Approvals ................................................................................................................................................................ 1 Description / Operation .......................................................................................................................................... 1 Technical Data ........................................................................................................................................................ 2 Figure 1 - Operation Diagram: Model 39 Dry Pipe Valve Set Position .............................................................. 3 Figure 2 - Operation Diagram: Model 39 Dry Pipe Valve Operating Position .................................................... 3 Ordering Information .............................................................................................................................................. 4 "Automatic" 4 Model 39 Dry Pipe Valve Assembly - Parts List ........................................................................... 5 "Automatic" 6 Model 39A Dry Pipe Valve Assembly - Parts List ........................................................................ 6 "Automatic" 4 Model 39 Dry Pipe Valve - Basic Trim Setup 39-4B with Manual Control Connections - without Accelerator - Parts Drawing & List ........................................... 7 "Automatic" 4 Model 39 Dry Pipe Valve - Trim Options ...................................................................................... 8 "Automatic" 6 Model 39A Dry Pipe Valve - Basic Trim Setup 39-6D with Manual Control Connections - without Accelerator - Parts Drawing & List ........................................... 9 "Automatic" 6 Model 39A Dry Pipe Valve - Trim Options .................................................................................. 10 Air Supply Connections ........................................................................................................................................ 11 Owners Air Supply - Automatic .................................................................................................................... 11 Nitrogen Cylinder Air Supply - Automatic (Air Pressure Maintenance Device) .......................................... 11 Calculating Nitrogen Requirement ................................................................................................................ 11 "Automatic" Accelerator Model 1 ......................................................................................................................... 12 General Description ....................................................................................................................................... 12 Installation ...................................................................................................................................................... 12 Operation ....................................................................................................................................................... 13 Procedure for Operational Testing of Accelerator Model 1 (85-100) .......................................................... 14 Resetting Procedure ...................................................................................................................................... 14 Accelerator Field Repairs .............................................................................................................................. 15 "Automatic" Accelerator Model 1 - Replacement Parts List & Drawing .................................................... 15 Air Pressure Maintenance Device Mode A-1 ...................................................................................................... 16 General Description ....................................................................................................................................... 16 Maintenance ................................................................................................................................................... 16 Air Pressure Maintenance Device Mode A-1 - Replacement Parts List & Drawing .................................. 17

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Velocity Check Valve 39-300 and Replacement Kit 39-310 .............................................................................. 18 Trouble Alarm Silencing Panel ............................................................................................................................ 18 Model 39-740A - Manual Resetting Type ........................................................................................................ 18 Testing and Maintenance ..................................................................................................................................... 19 Testing ............................................................................................................................................................ 19 Testing Waterflow Alarm Devices ............................................................................................................. 19 Testing Low-Air Pressure Alarm Devices ................................................................................................. 19 Flow Test at Main Drain Valve (Main Drain Test) ...................................................................................... 19 Trip Testing of Dry Valve ........................................................................................................................... 20 Trip Test- Partial Flow ............................................................................................................................... 20 Trip Test- Full Flow ................................................................................................................................... 20 Tags / Records ......................................................................................................................................... 21 Maintenance ................................................................................................................................................... 21 Clapper Facing ......................................................................................................................................... 21 Seat Rings ................................................................................................................................................ 21 Velocity Check Valve ................................................................................................................................ 21 Accelerator ............................................................................................................................................... 21 Antiflooding Device ................................................................................................................................... 21 Alarm Line Strainer ................................................................................................................................... 21 Alarm Test Valve, Main Drain Valve, Inspectors Test & Air Supply Control Valve (Manual Setup) ............ 21 System Control Valve, Alarm Control Valve & Air Supply Control Valve (Automatic Setup) ...................... 22 Dry Valve & Trim ....................................................................................................................................... 22 Air Maintenance Device or Automatic Control Connections ..................................................................... 22 Air Compressor ........................................................................................................................................ 22 Air Pressure .............................................................................................................................................. 22 Priming Water Level ................................................................................................................................. 22 Valve Enclosure ........................................................................................................................................ 22 System Low Points ................................................................................................................................... 22 Resetting of System ................................................................................................................................. 23

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123 456DATA SHEET #SVL300

MODEL 39Dry Pipe Valves

GeneralThe Automatic Model 39 Dry Pipe Valve is a waterflow control/alarm device designed for installation in the main supply to a dry pipe sprinkler system. Its purpose is twofold. First, it holds back the water, keeping it from flowing into the system until such time that sprinklers operate. This function is accomplished by the special design of the valve (see Description / Operation). Second, it provides the means to actuate a fire alarm when the flow of water from the system equals or exceeds that of a single sprinkler. The alarm may be accomplished in two ways: (1) mechanically by means of a water flow to a water motor alarm and/or (2) electrically via a water-pressure-actuated alarm switch (circuit closer) connected to an electrically operated signaling device such as a bell or light. The Model 39 Dry Pipe Valve is made in two sizes: 4" (101.6 mm) and 6" (152.4 mm). Note: For general discussion, both the 4" and the 6" valve sizes are referred to as Model 39 Dry Pipe Valves. Operationally, the two are the same. But technically, because of modifications made in the clapper subassembly, the 6" valve is now designated as a Model 39A, except for LPCB approved construction which continues as Model 39. This specific designation is used for all technical data pertaining to the particular valve. Note: In the general discussion, the terms dry pipe valve and dry valve are used interchangeably; and so are the terms dry pipe system and dry system. Each dry valve is provided with a basic trim package that includes manual air supply connections, priming connections, drain connections, alarm outlets and an alarm test by-pass. Optional trim packages are available to provide connections for an automatic air supply, or for a manual or automatic nitrogen supply. Alarm and supervisory devices may be provided separately. A trim package is available to add the "Automatic" Model 1 Accelerator to the Model 39 Dry Valve. This quick-opening device is required when the system capacity exceeds 500 gallons (per NFPA 13). See NFPA 13 for exceptions.

ApprovalsModel 39 Dry Pipe Valves are listed or approved by the various testing and inspection organizations concerned with product evaluation. These include: Underwriters Laboratories (UL) Factory Mutual (FM) Underwriters Laboratories of Canada (ULC) Loss Prevention Certification Board (LPCB)

These valves are listed/approved with specific trim and for installation in accordance with the applicable requirements of NFPA 13. Therefore, no substitutions or omissions, in part or in full, are allowed. For the particular listings and/or approvals of each dry valve, refer to Technical Data section of this data sheet. The Model 1 Accelerator is listed and approved for use specifically with the Model 39 Dry Pipe Valves. All devices are listed/approved for a maximum water working pressure (WWP) of 175 psi (1206.6 kPa or 12.1 bar).

Description / OperationThe Model 39 Dry Pipe Valve is a differential type valve having an intermediate chamber. Its design is such that a relatively low air pressure may be used to keep the clapper closed against a higher water supply pressure. In the set position (see Figure 1), the rubber-faced clapper closes tightly on two concentric seat rings. The inner ring is the water seat ring; the outer is the air seat ring. The annular space between the two rings is the intermediate chamber. When the valve is in service (set), this cham-

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ber is open to the atmosphere through the velocity check valve. Priming water is provided above the clapper up to the level of the air supply connections. Above the priming water level, compressed air (or nitrogen) is maintained at a pressure sufficient to keep the clapper closed. The purpose of the priming water is to provide a positive seal to prevent air from escaping through the intermediate chamber. The air pressure, then, acting on the priming water over the larger area above the clapper, offsets the higher water pressure acting on a smaller area below the clapper (area of the larger air seat ring versus the area of the smaller water seat ring). The clapper will remain in the closed position as long as the air pressure in the system is maintained at the proper level. For air pressures to be used for various water supply pressures, see Maintenance - Air Pressure. When a sprinkler operates, the system loses its air pressure through the opened sprinkler. This loss lowers the system pressure to a point where it can no longer keep the dry valve closed. The water supply pressure, then, lifts the dry valve clapper and forces it up into the open or operated position (see Figure 2). Water flows into the system and on to the opened sprinkler(s). At the same time, water flows into the intermediate chamber, closes the velocity check valve, then continues on via the alarm line

connections to sound the water motor alarm and/or operate the pressure-actuated alarm switch. The Model 39 Dry Pipe Valve has a trip ratio of approximately 6 to 1. This means that the valve will open (trip) when the air pressure in the system is reduced to about one-sixth of the water supply pressure. On large systems, it can take longer to lower the air pressure to the trip point of the dry valve. To speed up the operation of the valve, a quick-opening device (QOD) is required. The QOD used with the Model 39 Dry Valve is the Model 1 Accelerator. Its operation with the valve is as follows: When a sprinkler operates, the accelerator responds to the rapid drop in air pressure. It opens and allows the remaining air pressure to pass to the intermediate chamber of the dry valve where it assists the water pressure in overcoming the pressure differential. In the intermediate chamber, the redirected air pressure acts on the underside of the clapper in the area between the air and the water seat rings while the water pressure is acting on the area within the water seat ring. Together, then, the air and water pressures overcome the air pressure acting alone on top of the clapper. This forces the clapper to open quickly. The operation of the dry valve has been accelerated.

Technical DataAvailable Sizes: .................. 4" (101.6 mm) Model 39 6" (152.4 mm) Model 39A Inlet & Outlet: ...................... Class 125 Flanged Water Working Pressure: .... 175 psi (1206.6 kPa or 12.1 bar) Basic Trim Setup: ............... With Manual Control Connections Air Maintenance Device Nitrogen Cylinders & Connections Accelerator/Accelerator Trim Options Listings & Approvals: .......... UL Listed FM Approved ULC Listed LPCB Approved - 4" & 6 Model 39 Pressure Loss: For use in hydraulic calculations, the pressure loss through the alarm valve may be expressed as equivalent feet of pipe: 4" Valve = 22 Ft 6" Valve = 26 Ft Conversion Factors: 1 inch 1 psi = 25.4 millimeters (mm) = 6.895 kilopascals (kPa) 0.0689 bar 1 gallon = 3.785 liters (L)0 .1 (0 .7 ) 1 0 0 (3 7 9 ) 2 0 0 3 0 0 (7 5 7 ) (1 1 3 6 ) 5 0 0 (1 8 9 3 ) 1 0 0 0 (3 7 8 5 ) 2 0 0 0 3 0 0 0 (7 5 7 0 ) (1 1 3 5 5 ) 7 .0 (4 8 .3 ) 5 .0 (3 4 .5 ) 3 .0 (2 0 .7 ) 2 .0 (1 3 .8 )

P r e s s u r e in p s i ( k P a )

m m ) 4 in . (1 0 1 .6. lo w

Trim Options: ..... Automatic Control Connections

1 .0 (6 .9 )

0 .5 (3 .4 )

in g p m

Pressure Loss Curves

2

6 in . (1 5 2 . 4 m m )( L /m in .)

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"Automatic" Model 39 and 39A Dry Pipe Valves

Ordering Information "Automatic" Model 39 and 39A Dry Pipe Valves

4" Model 39 Symbol Item/Setup Dry Pipe Valve only (without trim) Basic Trim setup for Dry Pipe Valve: Manual Control Connections for supply from owners air or Nitrogen source, or from a manually operated air compressor. Trim Option for Accelerator ( less Accelerator): Note: Accelerator is to be ordered separately and in addition to the trim option. Accelerator Automatic Model 1 Trim Options for Air/Nitrogen Supply Connections: Automatic Control Connections to connect to Basic Trim Setup for supply from an automatic air compressor serving one dry system only. Air Maintenance Device - Automatic Model A-1 to connect to Basic Trim Setup to provide automatic control from owners air or nitrogen source, or from an automatic air compressor serving one or more systems. Nitrogen Cylinders & Connections nitrogen supply source to connect to manual control setup (Basic Trim Setup) or to automatic control setup (Basic Trim Setup with Air Maintenance Device). Optional Alarms: Note: Connections for an Alarm Switch and a Low Air Pressure Alarm Switch are included as part of the Basic Trim Setup. The switches, however, must be ordered separately. 39-ACC 1404861 39-4B 39-441 1404800 8039441 Number 39-400 Part Number 8039400

6" Model 39A Symbol Number 39-600A Part Number 8039710

39-6D 39-642

1404860 8039642

39-ACC

1404861

39-760

8039760

39-760

8039760

39-ON

1404819

39-ON

1404819

-

-

-

-

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"Automatic" 4" Model 39 Dry Pipe Valve Assembly

Parts List "Automatic" 4 Model 39 Valve Assemblies - Symbol No. 39-4004 Valve Item Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Body Water Seat Ring Air Seat Ring Handhole Cover Nameplate Drive Screws: #0 x 2 required Handhole Gasket Stud Bolts 5/8 11 x 2-1/4 Long 10 required Hex Nuts 5/8 11 10 required Clapper Subassembly Clapper Clapper Facing Facing Retaining Ring Retaining Ring Screws 3/8 16 x 7/8 long 6 required Clapper Latch Latch Pin Cotter Pins 2 required Hinge Pin Hinge Pin Bushings (2 in Body) 3/4 Plug Velocity Check Valve Assembly Stud Bolts 5/8 11 x 2-3/4 long 4 required Hex Nuts 5/8 11 4 required Steel Steel Brass Bronze Monel Brass Brass Brass Brass 39-416 39-300 39-406 39-418 1420155 8039406 8039418 1417143 8039416 2096104 8039300 1402363 1600749 Bronze Rubber Brass Part Name Valve Body Subassembly Cast Iron Brass Brass Cast Iron Aluminum Steel Rubber Material Symbol Number S39-401 39-402 39-425 S39-430 39-403 39-424 39-405 Part Number 8039401 8039402 8039425 1402362 1600749 8039430 8039403 1039424 8039405

Handhole cover and related items are not shown in detail. These items are not field replaceable.

Special Note: When a complete valve assembly is provided, the Velocity Check Valve Assembly (14), Stud Bolts (15) and Nuts (16) are boxed separately and placed inside the valve for shipment.

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"Automatic" 6" Model 39A Dry Pipe Valve Assembly

Parts List "Automatic" 6 Model 39A Valve Assemblies - Symbol No. 39-600A6 Valve Item Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Body Water Seat Ring Air Seat Ring Handhole Cover Nameplate Drive Screws: #0 x 2 required Handhole Gasket Hex Head Cap Screws 3/4 10 x 1-3/4 10 required Clapper Subassembly Clapper Clapper Facing Facing Retaining Ring Retaining Ring Screws 12 required Clapper Latch Latch Pin Cotter Pins 2 required Latch Spring Hinge Pin Bushings (2 in Clapper) Hinge Pin Hinge Pin Bushings (2 in Body) 3/4 Plug Velocity Check Valve Assembly Stud Bolts 3/4 10 x 3 long 4 required Hex Nuts 3/4 10 4 required Ductile Iron Rubber Cast Iron Brass Bronze Monel Brass Bronze Brass Stainless Steel Brass Brass Steel Steel Part Name Valve Body Subassembly Cast Iron Brass Brass Cast Iron Aluminum Steel Rubber Steel Material Symbol Number S39-601 39-602A-1 39-625 S39-603-4 39-603-1 39-624A 39-605 39-612 39-606C 39-618A 39-628A 39-616-1 39-300 Part Number 8039151 8039152 8039175 1420125 8039604 8039603 1039625 8039157 8039162 8039156 8039168 1417143 1039628 8039616 2096104 8039300 1402371 1600750

Handhole cover and related items are not shown in detail. These items are not field replaceable.

Special Note: When a complete valve assembly is provided, the Velocity Check Valve Assembly (16), Stud Bolts (17) and Nuts (18) are boxed separately and placed inside the valve for shipment.

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"Automatic" 4" Model 39 Dry Pipe Valve

Basic Trim Setup 39-4B with Manual Control Connections - without AcceleratorSVL300 7

"Automatic" 4" Model 39 Dry Pipe Valve - Trim Options

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"Automatic" 6" Model 39A Dry Pipe Valve

Basic Trim Setup 39-6D with Manual Control Connections - without AcceleratorSVL300 9

"Automatic" 6" Model 39A Dry Pipe Valve - Trim Options

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Air Supply Connections

Owners Air Supply - Automatic

Note: The Orifice By-Pass Valve must be normally closed or valve operation will be serously impaired. The two isolating valves (normally open) are closed only to service the Air-Pressure Maintenance Device between them. The Air Pressure Relief Valve is set at 5 psi above maximum permissible pressure to assure against excessive pressure in Dry Pipe System.

Automatic control connections for Owners Air or Nitrogen source automatically maintains proper pressure from these supplies to the dry pipe valve. Automatic control is provided by the Model A-1 Air Pressure Maintenance Device (see separate section for this unit).

Calculating Nitrogen Requirement1. Calculate system capacity in gallons using table below: Gal. Per Ft. .045 .078 .106 .174 Pipe Size 2-1/2 3 3-1/2 4 Gal. Per Ft. .248 .383 .513 .660 Pipe Size 5 6 8 Gal. Per Ft. 1.04 1.50 2.66

Pipe Size 1 1-1/4 1-1/2 2

Sch. 40 pipe for 1 thru 6. Sch. 80 pipe for 8. 2. 3. Determine Pressure requirement. Read across bottom to point including system capacity, then up to line past pressure requirement curve intersection. At left the number of cylinders needed is given. Be sure to order enough spares to refill system in case of operation.4 3 2 1 0 0

N o . o f N itr o g e n C y lin d e r s C o n ta in in g 2 5 2 . t 3 G a s a t 2 1 0 0 P S IG

Nitrogen Cylinder Air Supply - Automatic (Air Pressure Maintenance Device)Air Supply connections for Nitrogen Cylinder-Automatic are the same as for owners Air Supply-Automatic. The Cylinder connections are ordered and furnished separately.

IG P S 5 5 IG P S 4 5 IG S 3 5 P IG 2 5 P S P S IG 2 5

2 0 0

4 0 0

6 0 0

8 0 0

1 0 0 0

1 2 0 0

1 4 0 0

1 6 0 0

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"Automatic" Accelerator Model 1

General DescriptionAn accelerator is an accessory device used on large dry pipe systems to hasten dry valve operation. NFPA Pamphlet 13 requires that each standard dry valve controlling a system with a capacity of more than 500 gallons must be provided with an accelerator. In a fire condition, the accelerator redirects air pressure from the system piping into the intermediate chamber of the dry pipe valve. This air pressure assists the water pressure to overcome the pressure differential and opens the dry pipe valve. The Model 1 Accelerator is UL Listed and FM Approved for use with the "Automatic" Model 39 and 39A Dry Pipe Valve.

InstallationAn accelerator is an accessory device used on large dry pipe systems to hasten dry valve operation. NFPA Pamphlet 13 requires that each standard dry valve controlling a system with a capacity of more than 500 gallons must be provided with an accelerator. See figure below.

Accelerator Connections

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"Automatic" Accelerator Model 1Accelerator Dome

Diaphragm Plunger Figure 1 Restriction Pin

Foam Sprinkler Piping Exhaust Valve Valve Spring

To Intermediate Chamber

Accelerator Dome

Figure 2

Operation(See Figure 1) Under normal conditions. the valve spring keeps the exhaust valve seat up against its seat rirlg with equal pressure from the piping system above and below the diaphragm. Air pressure from the sprinkler piping can freely pass to the underside of the diaphragm through a hole. Air pressure can seep slowly into the accelerator dome through the restricted orifice formed by the restriction pin and the stem of the dome plunger. With the exhaust valve up against its seat, air pressure cannot pass into the intermediate chamber. (See Figure 2) Operation of the exhaust valve occurs when an opened sprinkler causes sudden pressure drop in system piping. When a sharp pressure drop occurs, it does not affect the air pressure in the dome immediately. Therefore, the greater pressure in the dome opens the exhaust valve and permits air pressure to pass in into the intermediate chamber.

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Procedure for Operational Testing of Accelerator Model 1 (85-100)Before proceeding with test, make certain that accelerator shut-off valve is open and that the 250 psi air pressure gages on top of the accelerator dome and in the air supply priming line are equalized at system air pressure. 1. 2. 3. Close controlling gate valve. Open 2" main drain to relieve pressure under clapper. Close accelerator shut-off valve. Note: If there are leaks of sufficient magnitude in the joints between the shut-off valve and the accelerator, accelerator operation may occur upon closing the shut-off valve. 4. Slowly, loosen 1/2" union between the accelerator shutoff valve and the accelerator.

Resetting ProcedureIf an Accelerator, Model 1, is used with the dry pipe sprinkler system it must be cleaned and reset as follows: 1. Remove bottom plug and attached spring, exhaust valve seat, and restriction pin. Carefully clean rubber seat of exhaust valve, exhaust valve seat rings, and restriction pin making sure that no foreign matter adheres to them and that they are not damaged. Use smoking pipe cleaner to clean passage in diaphragm plunger and make sure that all water is drained from the accelerator dome. Removal of the accelerator air gage provides an opening to atmosphere so that the dome can be drained. Replace bottom plug and related parts. If bottom plug gasket is not in good condition, replacement is necessary. Make sure accelerator shut-off valve is open.

2.

3.

4. 5. Accelerator operation can be detected by the audible tripping of the accelerator followed by decreasing accelerator dome pressure. Retighten 1/2" union between accelerator shut-off valve and accelerator. Slowly open accelerator shut-off valve while listening for air discharge through the velocity check. The sound of air escaping through the velocity check will insure that the accelerator has operated. After allowing accelerator dome pressure to drop sufficiently below system air pressure, fully open accelerator shut-off valve and allow accelerator dome pressure to equalize. Bring system to proper air pressure.

After allowing about one-half hour to lapse, check air gage mounted on accelerator dome to see that accelerator dome pressure has equalized with sprinkler piping pressure.

6.

7.

8.

9.

10. Close 2" main drain. 11. Open controlling gate valve.

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Accelerator Field Repairs1. Remove accelerator from dry pipe valve after first shutting off the water supply and bleeding the air from the system. Remove bottom plug 85-3 and restriction pin screw 85-9. Remove restriction pin S85-103 being careful not to bend, and exhaust valve S85-102. Remove lower chamber S85-101 A from dome 85-19. Remove retaining ring screws 1420274 and diaphragm retaining ring 85-5. Remove diaphragm 85-12, diaphragm washer 85-15 and restriction tube 85-11 . Clean out all sediment above or below diaphragm. Replace exhaust valve S85-102 with a new one or grind disc smooth with fine grinding compound or emery cloth. If restriction pin S85-103 is bent or rusty, it should be replaced with a new one. The new pin may have to be filed somewhat smaller in some cases or the pressure will not equalize in the dome. If valve spring 85-10 is not in good condition, replace with a new one. Replace diaphragm 85-12, diaphragm washer 85-15 and dome gasket 85-17 with new ones. Gasket 85-17 is important and must be 3/32" thick or it will allow diaphragm plunger 85-4 to protrude too low and keep exhaust valve from closing tight against seat. After desired parts have been replaced, reassemble, being sure everything is air tight. It is easy to have a small leak in some of the gaskets if not extremely careful. Re-install the accelerator on the dry pipe valve and reset the valve in accordance to instructions under Resetting System in Dry Pipe Bulletin 305 or page 23 of this data sheet. Note:The dome gasket 85-17 is to be coated on both sides with Dow Corning Valve Seal Lubricant, or equivalent, before assembly.

2. 3. 4. 5. 6. 7. 8.

9.

10. 11.

12.

13.

"Automatic" Accelerator Model 1 - Replacement Parts ListNote: Order Replacement Parts by Part Number Part Number Symbol Number Description Part Number Symbol Number Description

8085002 ......... 85-3 ......... Bottom Plug 8085003 ......... 85-4 ......... Diaphragm Plunger 8085004 ......... 85-5 ......... Diaphragm Retaining Ring 8085602 ...... S85-102 ..... Exhaust Valve 8085603 ...... S85-103 ..... Restriction Pin 8085018 ......... 85-9 ......... Restriction Pin Screw 1085010 ........ 85-10 ........ Valve Spring

8085009 ......... 85-11 ....... Restriction Tube 1085012 ......... 85-12 ....... Diaphragm 8085012 ......... 85-14 ....... Bottom Plug Gasket 8085013 ......... 85-15 ....... Diaphragm Washer 8085014 ......... 85-16 ....... Diaphragm Nut 8085015 ......... 85-17 ....... Dome Gasket 1420274 ............. - ........... Diaphragm Retaining Ring Screw

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Air Pressure Maintenance Device

AIR PRESSURE MAINTENANCE DEVICE Model A-1: 39-760 (1/2" size)

General DescriptionThe air pressure maintenance device is an accessory device designed to maintain automatically, within predetermined limits, air pressure requirements in a dry pipe system. Air passes from the system air supply into the air pressure maintenance device where it is regulated to the air pressure required for the dry pipe sprinkler system. Small air losses are restored automatically without delaying system operation. Air pressure maintenance device Model A-1 is listed by Underwriters Laboratories and approved by Factory Mutual. The orifice by-pass globe valve, item 10, is normally closed. It is opened only to admit air more quickly into the sprinkler piping when the dry pipe system is being pressurized upon completion of installation or when the dry pipe system is being reset and system pressure is being restored. The two isolating valves, items 9, are normally open. They are closed only to service the air pressure maintenance device components between them. The orifice, item 13, restricts the rate of air flow into the system and prevents the air supply from replenishing a large volume of air such as would be lost from a fire opened sprinkler. The check valve, item 11, prevents system water pressure from entering the pressure regulator when the system is tripped. A strainer, item 12, prevents foreign material in the air supply from blocking the orifice.

ComponentsThe air supply line components (shown below and on page 16) are standard on "Automatic" Owners Air Supply. The regulator, item 1, has a maximum primary inlet pressure of 175 psi (1206.6 kPa) and a maximum secondary outlet pressure of 60 psi (413.7 kPa). It is factory set at 35 psi (241.3 kPa), however, it can be adjusted to suit field requirements. The outlet pressure of the regulator can be varied by loosening the locknut (on the regulator) and turning the adjusting knob clockwise (in) to increase the pressure or counterclockwise (out) to decrease the pressure. The pressure setting can be determined by reading the system air pressure gauge.

MaintenancePeriodically check the orifice and strainer for blockage. Verify that the orifice by-pass globe valve is closed and the isolating valves are open for proper operation of the device.

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Air Pressure Maintenance Device

Air Pressure Maintenance Device - Replacement Parts ListModel A: 39-760

Item

Part Number

Description

Qty

1 ............................... 2 ............................... 3 ............................... 4 ............................... 6 ............................... 7 ............................... 8 ............................... 9 ............................... 10 .............................. 11 .............................. 12 .............................. 13 .............................. 15 .............................. 18 .............................. 19 ..............................

1601385 ................................ 1/4" Regulator ........................................................... 1 2034202 ................................ 1/4" x 90 Street Ell - Black ...................................... 2 4072401 ................................ 1/4" x 1-1/2" Nipple - Black ....................................... 3 4072405 ................................ 1/4" x 3" Nipple - Black ............................................. 1 4072020 ................................ 1/2 Close Nipple - Black .......................................... 2 2018014 ................................ 1/2" x 1/2" x 1/4" Tee - Black .................................... 2 2039204 ................................ 1/2 Union - Black ..................................................... 2 5101001 ................................ 1/4" Globe Valve - Brass ........................................... 2 5101002 ................................ 1/2" Globe Valve - Brass ........................................... 1 5301005 ................................ 1/4" Check Valve - Brass .......................................... 1 2016044 ................................ 1/4" Strainer - Brass ................................................. 1 8039751 ................................ 1/16" Orifice Restriction - Brass ............................... 1 1075690 ................................ Label ......................................................................... 1 4072024 ................................ 1/2 x 2-1/2 Nipple - Black ....................................... 2 2039202 ................................ 1/4 Union - Black ..................................................... 1

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"Automatic" Model 39 Dry Pipe Valve

Velocity Check Valve 39-300 and Replacement Kit 39-310The main function of the velocity check valve is to prevent seepage from building up pressure in the intermediate chamber and to allow the alarm line to drain. Install with exhaust holes pointing downward into drip cup. The Velocity Check Valve consists of a hollow cylindrical chamber with a beveled orifice and a brass ball. This is screwed into a 1-1/4 tapped outlet on the newer Model 39 Dry Valves. For installation on the old type casting, a mounting plate (39-303) is available as part of the Replacement Kit 39310.

Trouble Alarm Silencing PanelThe Trouble Alarm Silencing Panel is used with Model 39 and 39A Dry Valves in conjunction with a Low Air Pressure Switch and a Horn, Siren or Bell. Its function is to silence the Trouble Alarm Signal until the cause can be located and corrected. It can also be used with a monitor switch, a low liquid level switch or with any electrical detecting device which will open or close a circuit.

Model 39-740A - Manual Resetting Type: The Trouble Alarm will sound and the toggle switch will illuminate when a Low Air Pressure Trouble Alarm Switch (or other signalling device) closes the circuit due to an abnormal condition. Throwing the switch to the Off position silences the alarm. The toggle switch will continue to illuminate. When the trouble has been corrected, the toggle switch will cease to illuminate and the alarm will commence sounding. Throwing the switch to the On position (Normal) will silence the alarm and place the circuit in normal operating position. Ordering Information When ordering, specify: Model 39-740A - Trouble Alarm Silencing Panel.

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Testing and Maintenance

Reference. NFPA 25, Recommended Practice for the Inspection, Testing and Maintenance of Sprinkler Systems.

dry valve clapper will eliminate the possibility of tripping the dry valve. 2. 3. Close the Air Supply Control Valve. While observing the Air Pressure Gage, slowly open the Condensate Drain Valve to bleed air from the system piping. When the low air pressure alarms sound and/or operate, quickly close the Condensate Drain Valve. At the same time, note the pressure reading on the Air Pressure Gage. Record this reading. Open the Air Supply Control Valve and restore the air pressure on the system to the proper level (see Maintenance - Air Pressure for air pressures required for various water supply pressures). Slowly open the System Control Valve. When water starts to discharge from the main drain pipe, slowly close the Main Drain Valve. Turn the System Control Valve to its full open position. Seal, lock or otherwise secure the valve in the open position. The system is now ready for service. If alarms connect to a central station, notify the signal receiving station when all tests have been completed.

TestingBefore proceeding with any tests involving water flow, certain precautions need to be taken. 1. Check the location where the test connection discharges to make sure that all is clear and that there is no possibility of the water flow causing damage or injury.

4. 2. Check the end of the test connection to make sure that is is unobstructed. To obtain a satisfactory test, there must be an unrestricted flow of water when the test valve is wide open. 5. 3. Check for alarm connections to a central station or fire department. If such connections are found, give proper notice to the signal receiving station before proceeding with the test.

6.

Testing Waterflow Alarm Devices. NFPA 25 recommends that the waterflow alarm devices be tested quarterly. On a dry system, the primary way to test this equipment is by opening the Alarm Test Valve provided as part of the dry valve trim. Using this valve, the alarms may be tested without tripping the dry valve, since the supply for the alarm test line is taken from a point below the dry valve clapper (see Description / Operation). Waterflow alarms may also be tested by opening the Inspectors Test Connection. Caution: Opening the Inspectors Test Connection will cause the dry valve to trip and thereby allow water to flow into the system. This means of testing, therefore, should be used only when a full flow trip test of the dry valve is to be provided (see Trip Test - Full Flow). Note: If alarms connect to a central station or fire department, notify the signal receiving station when all tests have been completed. Testing Low-Air-Pressure Alarm Devices. NFPA 25 recommends that the low air pressure alarm devices on a dry system be tested quarterly. This can be accomplished as follows: 1. Close the System Control Valve (OS&Y, PIV or other) and open the Main Drain Valve. Note: Relieving the water supply pressure under the

7.

Flow Test at Main Drain Valve (Main Drain Test). NFPA 25 recommends that a water flow test be made quarterly from the main drain valve at the system riser. The purpose of this test is to show whether or not the normal water supply is available to the system. By comparing static and residual pressure readings with those previously established, a main drain test can indicate the possible presence of closed valves or other obstructions in the supply piping. The procedure for conducting a Main Drain Test is as follows: 1. With the Main Drain Valve closed, note and record the reading on the Water Pressure Gage at the Dry Valve. Open the Main Drain Valve slowly until it is wide open. Then, check to make sure that a full steady flow of water is discharging from the main drain pipe. Note: If a full steady stream is not discharging, check the main drain piping further for possible obstructions. 3. Allow the water to flow until the reading on the Water Pressure Gage drops and stabilizes. Then, record this reading.

2.

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Note: The first and higher pressure reading is the static pressure. The second, lower reading is the residual pressure with a given flow discharging from the main drain pipe. 4. Close the Main Drain Valve slowly.

3.

Partially close the System Control Valve. Note: The valve should be kept open just enough to permit a full flow of water at good pressure through the main drain pipe.

4. Caution: If alarms have been temporarily shut off, they must be returned to service. If alarms connect to a central station or fire department, notify the signal receiving station when the test has been completed. 5. Compare both pressure readings with previously established or normal readings. Note: If the readings compare favorably, the water supply may be considered satisfactory. If, however, the pressure readings vary to any great extent, the condition should be investigated to determine the cause. Some possible causes are: Partially or totally closed system control valves. Clogged or frozen water mains. Serious leakage at valves or mains. Trip Testing of Dry Valve. NFPA 25 recommends that the dry valve be trip tested, cleaned and reset at least once each year. The usual procedure is to trip the dry valve with the system control valve partially open. But at least once every three years - or whenever the system is altered - the procedure is to trip the dry valve with the system control valve wide open. For discussion, these two test procedures are designated, respectively, as Trip Test-Partial Flow and Trip Test-Full Flow. Note: Dry valves should be trip tested during warm weather, preferably in the spring, to allow all condensate to drain from the system piping before the onset of cold weather. Note: Before proceeding with any trip test of a dry valve, the water supply line to the system should be thoroughly flushed. The system main drain may be used for this purpose; however, if there is a hydrant on the supply line, it should be used to flush the piping before the main drain is opened. Note: Assistance is required to perform certain operations in the test procedures. Trip Test-Partial Flow. The procedure for conducting a partial flow trip test is as follows: 1. Open the Main Drain Valve slowly until it is wide open. Then, check to make sure that a full steady flow of water is discharging from the main drain pipe. Allow the water to flow at full pressure long enough to clear the water supply pipe of any accumulation of scale or foreign material.

Slowly close the Main Drain Valve. The dry valve is now ready for trip testing. Note and record the readings on the Air Pressure and Water Pressure Gages. Note: Be prepared to again record the reading on the air pressure gage when the dry valve trips. Also, be prepared to note the length of time that it takes for the valve to trip after opening the test valve.

5.

6.

While observing the Air Pressure Gage, open the Inspectors Test Valve. Note: This valve is part of the Inspectors Test Connection. This connection, generally located at the highest and most remote point on the system in relation to the dry valve, consists of a test orifice and a controlIing globe valve. Opening of the globe valve (Inspectors Test Valve) simulates the operation of a sprinkler. Note: If two-way communication is not available, opening of the test valve may be determined by noting when the needle on the air pressure gage starts to move downward.

7.

When the Dry Valve trips, quickly note the tripping time and the air pressure at the time the valve tripped. Then, quickly close the System Control Valve and open the Main Drain Valve. Note: As a rule, quickly closing the system control valve and opening the main drain valve keeps the water from filling the system beyond the riser. It is good practice, however, to always check the system low points to make sure that water did not pass beyond the system riser.

8.

Record the tripping time and the air pressure at the trip point. Compare all data with previous test records. Note: If the data differs to any great extent from that shown in previous records, the cause should be determined and the condition corrected.

9.

Thoroughly clean the Dry Valve, renew parts as required and reset the valve (see Maintenance - Resetting the System).

Trip Test-Full Flow. The procedure for conducting a full flow trip test is as follows: 1. Open the Main Drain Valve slowly until it is wide open. Then, check to make sure that a full steady flow of

2.

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water is discharging from the main drain pipe. 2. Allow the water to flow at full pressure long enough to clear the water supply pipe of any accumulation of scale or foreign material. Slowly close the Main Drain Valve. The dry valve is now ready for trip testing. Note and record the readings on the Air Pressure and Water Pressure Gages. Note: Be prepared to again record the reading on the air pressure gage when the dry valve trips. Also, be prepared to note the length of time that it takes for the valve to trip and the length of time that it takes for water to reach the Inspectors Test Connection after opening the test valve. 5. While observing the Air Pressure Gage, open the Inspectors Test Valve. Note: This valve is part of the Inspectors Test Connection. This connection, generally located at the highest and most remote point on the system in relation to the dry valve, consists of a test orifice and a controlling gate valve. Opening of the globe valve (Inspectors Test Valve) simulates the operation of a sprinkler. Note: If two-way communication is not available, opening of the test valve may be determined by noting when the needle on the air pressure gage starts to move downward. 6. When the Dry Valve trips, quickly note the tripping time and the air pressure at the time the valve tripped. Allow the water to flow into the system until it reaches the Inspectors Test Connection. Note the time that it took for the water to reach the Inspectors Test Connection after the test valve was opened. Keep the Inspectors Test Valve open until clean water is flowing at the connection. Terminate the test by closing this valve and the System Control Valve. Record the tripping time and the air pressure at the trip point. Also, record the time that it took for the water to reach the Inspectors Test Connection. Compare all data with previous test records. Note: If the data differs to any great extent from that shown in previous records, the cause should be determined and the condition corrected. 10. Thoroughly clean the Dry Valve, renew parts as required and reset the valve (see Maintenance - Resetting the System). Make sure that the system is properly drained before restoring it to service.

3.

4.

Tags / Records. To comply with NFPA 25, the dry valve should be provided with an attached tag or card which shows the date when the valve was last tripped and the name of the person and organization making the test. Separate records should be kept which show the test results: initial air and water pressures, tripping time and air pressure when the valve tripped, and water delivery time to the inspectors test connection. The operating condition of the dry valve and other components should also be noted. After the test, the records should be compared with those from previous tests. If any of the data differs to any great extent, the cause should be determined and the condition corrected.

MaintenanceThe "Automatic" Model 39 Dry Pipe Valve and its related equipment should be examined periodically to ensure proper operation and trouble-free service. Several areas to be routinely inspected are: Clapper Facing. The rubber clapper facing should be checked for wear or damage, and to determine that it is free of dirt and other foreign substances. If found to be worn or damaged (e.g., foreign matter imbedded in the surface), the facing should be replaced. If it is dirty, it should be cleaned, but compounds which could damage the rubber facing must never be used. Seat Rings. Both the air and the water seat rings should be cleaned thoroughly and checked for possible damage. If either seat ring is found to be severely damaged, the complete dry valve assembly should be replaced. Velocity Check Valve. The plunger should be pushed in each time the dry valve is inspected to ensure that the ball is free and that there is no seepage of water that could build up in the intermediate chamber. Accelerator. The accelerator should be cleaned and reset after each operation of the dry valve. Also, the accelerator should be tested at least twice a year. If repairs are required which cannot be accomplished in the field, the device should be replaced. For technical information on the Model 1 Accelerator, see pages 12-15 or Technical Bulletin 305. Antiflooding Device. The float ball and strainer assembly should be removed and cleaned thoroughly. Alarm Line Strainer. The 3/4" strainer in the alarm line should be checked and cleaned thoroughly. Alarm Test Valve, Main Drain Valve, Inspectors Test & Air Supply Control Valve (Manual Setup). All controlling valves normally closed when the dry valve is in the set position should be checked to be sure that they are fully closed and not leaking.

7.

8.

9.

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System Control Valve, Alarm Control Valve & Air Supply Control Valve (Automatic Setup). All controlling valves normally open when the dry valve is in the set position should be checked to be sure that they are in the fully open position and sealed, where required. Dry Valve & Trim. The overall setup should be checked for visible leaks and possible physical damage to the valve and connections (e.g., broken gages). Note: When difficulty in performance is experienced, a qualified service technician or contractor should be contacted if any field adjustment or repair is attempted. Air Maintenance Device or Automatic Control Connections. Strainers and restriction orifices should be checked and cleaned as required. The orifice by-pass valve should be checked to see that it is fully closed. Air Compressor. The air compressor should be lubricated as recommended by the manufacturer. The motor unit should be kept free of dirt. Filters and strainers should be cleaned as required. Air Pressure. Air or nitrogen pressure must be maintained on the dry system throughout the year. Note: Dry systems should not be converted to wet systems during warm weather. To do so will cause corrosion and accumulation of foreign matter in the system piping. Also, when a dry system is turned wet, it is necessary to silence the waterflow alarm. A sprinkler system should never be without a waterflow alarm. The table below shows the air pressure required on the dry system for various water supply pressures. Water Supply Pressure (psi)* 50 75 100 125 150 175 * System Air Pressure (psi) Minimum Maximum 15 20 25 30 35 40 25 30 35 45 50 50

greater than the 10 psi (69 kPa), the system should be checked for leaks. Excessive leaks should be promptly repaired. For systems with automatic control connection (air compressor or air maintenance device), the pressure should be checked at regular intervals to see that the equipment is functioning properly and that the required pressure is being maintained. According to NFPA 13, the permitted rate of air leakage is 1.5 psi (10 kPa) for a 24 hour period. Low-air pressure alarms should be tested quarterly (see Testing Low-Air-Pressure Alarm Devices). The switch should be checked to see that it is properly set to operate at 5 psi (34 kPa) below the required system pressure. Priming Water Level. The priming water in the dry valve should be inspected quarterly and maintained at the proper level. Loss of water either through evaporation into the system or by seepage past the air seat ring could result in false operation of the valve. On the other hand, accumulation of additional water from condensation in the system can slow down the operation of the valve. To check the priming water, slowly open the Condensate Drain Valve. If water discharges into the Drain Cup, the priming water level is too high and it must be allowed to drain away. Let the water continue to drain, but slowly. Quickly close the Condensate Drain Valve when the water stops flowing. If air discharges when the Condensate Drain Valve is opened, quickly close the valve. The priming water level may be too low. To add priming water, proceed as follows: 1. Close the System Control Valve and open the Main Drain Valve. If the system has automatic air, close the Air Supply Control Valve. If there is an accelerator, close the Accelerator Control Valve. Open the Condensate Drain Valve and the Priming Cup Valve to bleed off the system air pressure. Refer to Resetting the System. Prime the dry valve per steps 10 thru 12, then repressurize the system and restore it to service in accordance with step 14 and steps 17 thru 21, where applicabie. Also comply with steps 24 and 25. Open the Accelerator Control Valve (if the system is so equipped and this valve has been closed).

2.

3.

The water supply pressure is the highest anticipated static pressure. If a fire pump is provided, it is the pump shutoff pressure or relief valve pressure, whichever is greater. When an accelerator is installed with the dry valve, a minimum system air pressure of 25 psi is required.

4.

Valve Enclosure. The temperature in the enclosure around the dry valve should be maintained at a temperature above 40 F (4C). System Low Points. Low points on the dry system should be drained as often as required to remove any water that has accumulated - especially before and during cold weather. The process should be repeated daily until all

For systems with manual control connections, the air or nitrogen pressure should be checked at least once a week. When the pressure is low, it should be restored to the proper level promptly. If the pressure loss each week is

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water is removed. Freezing of even a small amount of water can rupture sprinkler piping, thereby impairing the system and causing extensive water damage to the building and contents. Resetting of System After operation, the "Automatic" Model 39 Dry Pipe Valve must be reset and the system restored to service as soon as possible. 1. Close the System Control Valve (OS&Y, PIV or other). Caution: In the event of a fire, the system control valve is to be closed only after it has been determined, positively, that the fire has been extinguished. 2. 3. Close the Air Supply Control Valve. Open the Main Drain Valve and allow the system to drain completely. Leave the valve open. Note: If sprinklers have not operated, another means of venting the piping is required to properly drain the system. This can be accomplished by opening the Inspectors Test Connection. 4. Open the Auxiliary Drain Valves (or Outlets) at system low points and drain completely. At the Dry Valve, push in the plunger on the Velocity Check Valve. Release it when water stops discharging. Remove the Handhole Cover from the Dry Valve and raise the Clapper to a wide open position. Thoroughly clean all interior parts of the valve. Check them for freedom of movement. Carefully inspect the Clapper Facing and Seat Rings for damage. Caution: Never use compounds or abrasives on the clapper facing or seat rings. Use bare fingers or cloth to remove grit deposits. Do not scar the seat ring surfaces. 8. Release the Clapper latch and lower the Clapper to the Seat Rings. Caution: Never use grease or other sealing material on the seat rings. Do not use force on the clapper in attempting to make the dry valve tight. 9. Replace the Handhole Cover and Gasket, tightening the Cover Bolts (Cap Screws) evenly and securely.

Note: To add priming water to the valve, the system piping must be open to atmosphere - for example, through an opened sprinkler or an open Inspectors Test Connection. 11. Open the Condensate Drain Valve and remove excess priming water from the Dry Valve. Close the Condensate Drain Valve. 12. Check the Velocity Check Valve for leakage. If there is none, proceed with resetting the Dry Valve. Note: Priming water must be retained in the valve before the system can be restored to service. If leakage is observed at the velocity check valve, the dry valve must be reopened and reinspected. Replace the clapper facing if it is worn. 13. Replace the sprinklers which have operated and make sure all auxiliary drains are closed. 14. Close the Inspectors Test Connection - if it has been opened to trip or vent the system. 15. Reset the Accelerator - if the system is so equipped (see Cleaning / Resetting of Accelerator in "Automatic" Data Book or Technical Bulletin 301). Note: Cleaning and resetting of the accelerator may proceed concurrent with re-establishing the air supply on the system (Steps 16 thru 18 which follow). 16. Open the Air Supply Control Valve and admit air to the system. Note: It is good practice to build up the air pressure to about 10 psi, then individually open the auxiliary drains to force any remaining water from the systems low points. When dry air starts to discharge, close the valve or outlet. Be sure to replace the plugs in all drain valves. 17. Admit air to the system until the Air Pressure Gage registers the required pressure - that is, until there is sufficient air pressure to hold the Dry Valve closed against the water supply pressure (see Maintenance - Air Pressure for air pressures required for various water supply pressures). 18. Again, check the Velocity Check Valve for leakage. If there is none, proceed with resetting the system. Note: If the Clapper Facing is tight on the Air Seat Ring, the valve will be holding its priming water and no leakage will be found. If leakage is observed, however, the dry valve must be reopened and reinspected. Priming water must be retained in the valve before the system can be restored to service.

5.

6.

7.

10. Open the Priming Cup Valve, while making sure that the Condensate Drain Valve is closed. Prime the Dry Valve by slowly pouring water into the Priming Cup. Stop pouring when water remains in the cup.

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19. Slowly open the System Control Valve. When water starts to discharge from the main drain pipe, slowly close the Main Drain Valve. 20. Turn the System Control Valve to its full open position. 21. Open the Alarm Control Valve - if it has been closed to silence alarms. Reset the Trouble Alarm Silencing Panel - if there are low-air-pressure alarms and they have been silenced. 22. Conduct a Main Drain Test to make sure the water

supply is satisfactory (see Flow Test at Main Drain Valve). 23. Conduct a test of the alarm devices (see Testing Waterflow Alarm Devices). 24. Seal, lock or otherwise secure the System Control Valve and Alarm Control Valve in an open position (per NFPA 25). The system is now ready for service. 25. If alarms connect to a central station or fire department, notify the signal receiving station that the system has been returned to service.

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This information is only a general guideline. The company reserves the right to change any portion of this information without notice. Terms and conditions of sale apply and are available on request. 2/02 Printed in USA (SLV300.PMD)

"Automatic" Sprinkler 150 Gordon Drive Exton, PA 19341 USA Tel: (610) 363-1400 800-626-2682 Fax: (610) 524-9073 800-858-6857

Documents

SVL300-Model 39