ObjectivesObjectives Show how PBM is different from

“Floating” ball valves.

Show how PBM’s self-flushing ball combined with PBM’s exclusive up and

downstream sealing can be used to effectively clean a ball valve

Show why PBM ball valves can be used in high purity applications.

Self-Flushing Ball

Testing and Information

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Ball Valve Design TypesBall Valve Design TypesBall Valve Design TypesBall Valve Design Types

• Floating ball traditional design– Relies on upstream line

pressure from the media to seat the ball against the downstream seat

– Not suitable in low pressure applications, such as vessels, tanks, and reactors

– May add considerable “dead space” in tank bottom applications

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PBM Adjust-O-SealPBM Adjust-O-Seal®® Design... Design...PBM Adjust-O-SealPBM Adjust-O-Seal®® Design... Design...

• Is NOT a trunnion ball design

• Does NOT rely on upstream pressure to seal

• Does NOT secure the ball against seats with springs

• Has the Adjust-O-Seal® design to maintain pressure securing the ball against the seats

• Seals independently on both the upstream and downstream seats

new_aos

ADJUST-O-SEAL

FEATURE

R

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SK-98011

Location of purge ports is critical -- condensate drain must always be at the lowest possible point.

Two-Way

CIP/SIP OptionsCIP/SIP OptionsCIP/SIP OptionsCIP/SIP Options

Ball purge holes

Flush Tank

Milled ball flats

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Dual ChamberDual Chamber Concept ConceptDual ChamberDual Chamber Concept Concept

• Adjust-O-Seal creates a “dual chamber” that allows cleaning or steaming of valve internals while providing complete isolation from the process -- when the valve is in the full closed or full open position.

One of PBM’s best kept secrets.

Process media can flow through the ball.

Cleaning media can flow around the ball.

Allows body cavity options to minimize problems with trapped fluid in the valve body that could contaminate the process or prevent smooth operation of the valve in sanitary and other applications.

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PBM Adjust-O-SealPBM Adjust-O-Seal®® Design (cont.) Design (cont.)PBM Adjust-O-SealPBM Adjust-O-Seal®® Design (cont.) Design (cont.)

• Both low and high pressure applications– Excellent for vacuum service

• Multiple adjustments result in longer seat life

• Zero leakage

• Equal throughout complete pressure range

• No product entrapment behind seats

• No direct leak path past body gaskets

• Body cavity options

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SK-98008

Body Cavity FillersBody Cavity FillersBody Cavity FillersBody Cavity Fillers

• PBM was first to introduce, others have copied

• Made of machined Virgin Polytetrafluoroethylene (VTFE) (other filler materials are available).

• Designed to fill the cavity of the valve between the body and the ball -- whatever is in the ball stays in the ball.

• Minimize problems with trapped fluid in the valve body that could contaminate the process or prevent smooth operation of the valve.

• Required in some applications for USDA compliance.

Cavity Fillers

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PACKING

FOLLOWER

SPRING

WASHER

JAM NUT

STEM

Bottom Entry Stem & Live-Loaded SealBottom Entry Stem & Live-Loaded SealBottom Entry Stem & Live-Loaded SealBottom Entry Stem & Live-Loaded Seal

• Machined Teflon stem packings; two on the top, and one on the bottom– Mechanically loaded (“live-

loaded”) with Belleville spring washers

• Washers compensate for normal wear by providing a constant load on the stem seal, creating the memory that Teflon seals don’t have.

• Eliminates need for frequent adjustments required of a packing gland style.

• If necessary, PBM’s stem seal load can be adjusted without replacing the seals. This reduces wear characteristics, and increases cycle life.

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Metal MaterialsMetal MaterialsMetal MaterialsMetal Materials

• PBM offers the following materials of composition:– Alloy 20– Aluminum, Aluminum Alloys– Aluminum Bronze - 953, 955– Bronze - 836, 922, 932, 954, 955– Carbon Steel– Hastelloy - B-2, C-22, C-276– Inconel– Iron– Monel– Nickel, Nickel Al Bronze, Nickel 200– Stainless Steel - Duplex, AL6XN®, 304, 304L, 316, 316L, 317, 317L– Titanium - Grade 2, Grade 5

Others may be available upon request..

Seat and Seal MaterialsSeat and Seal MaterialsSeat and Seal MaterialsSeat and Seal Materials

Designation Description Color

UHMWPEUltra High Molecular WeightPolyethylene

GlossyOff White

KYNAR® Polyvinylidene FluorideSlightlyTransparent White

VTFEVirgin PTFEPBM standard for Igenix® SanitaryValves and all cavity fillers

Bright White

RTFEGlass Reinforced PTFEPBM standard for seats, seals andstem packing, except Igenix® valves

Slightly Off White

S/STFE Stainless Steel Reinforced PTFE Dark Gray

TFM® Chemically Modified PTFE Bright White

PEEK Polyetheretherketone Putty

CARBONCarbon Graphite encapsulated in316L S/S Ring Black

Notes:1. PTFE is polytetrafluorethylene.2. With the exception of PEEK and Kynar, all seating materials meet the Class VI seat leakage criterion of ANSI/FCI 70-2 and the zero leakage criterion of

MSS SP-61. For PEEK and Kynar seats, the liquid criterion of Class V and ANSI/FCI 70-2 applies. (PEEK seats are normally not tested with air.)3. Seat and seal materials may be mixed in a valve in order to provide media-compatibility and the appropriate torque, temperature and pressure ratings.

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Self-Flushing BallSelf-Flushing BallSelf-Flushing BallSelf-Flushing Ball

• PBM self-flushing balls join the cavity of the valve with the piping whenthe valve is open. The holes allow product to fill the cavity just as it fills the piping. When flushing the lines, the cleaning fluid fills the cavity and displaces the product.

• No features are sacrificed when self- flushing balls are used. The valves remain double-seated and seal in either direction when closed.

• Also available in diverter port and multi-port valves.

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Surface finish of the PBM sanitary valve body cavity is 20 RA (180 grit)

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Bottom of flushable ball exposing body cavity in open position

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Downstream side of ball

Conventional ball (sealing area)

Sanitary flushable ball with milled flats

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Milled flats allow body cavity to drain in the closed position

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P&G sanitary ball in closed position – draining cavity to downstream

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TestingTestingTestingTesting

PBM Procedure 0904-2: Flushing Tests of Liquid Through a

2-Inch Valve with TFM® seats and a Self-Flushing Ball

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Testing cont.Testing cont.Testing cont.Testing cont.

Test Valve

The test valve is PBM assembly SIHLH5X-G-8- - -A. It is a 2-inch valve with sanitary clamp ends, TFM ® seats, and a self-flushing ball (part SIHLH508SF). The bore through the valve is 1.87-inches with no contractions or expansions.

Flushing Procedure

Heat the hot water test facility to 170° to 180°F with a slave valve installed in lieu of the test valve.

Blank off one end of the test valve and position the axis of the valve vertically.

With the valve open fill it with product.

Cycle the valve 5 times then drain product out. Do not drain the bottom of the body. The valve should be horizontal during draining.

Secure flow in the test facility and valve out and remove the slave valve and install the test valve in the open position.

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Testing cont.Testing cont.Testing cont.Testing cont.

Valve in the test valve and initiate flow of about 40 to 43 gpm (about 5 fps) through the test valve. Do not cycle the test valve while flushing.

After 30 minutes has elapsed, secure the pump and remove the test valve.

Disassemble the test valve and inspect for evidence of product. Take photographs as needed.

Flush product from the test facility by performing fill and drains then repeat these steps for additional product flushes.

Product

Liquid detergent (dark blue in color) and liquid fabric softener (light blue in color).

Results

The table below provides the results of the flushes. Flush numbers designated with a “D” are liquid fabric softener flushes and flushes numbers designated with a “T” are liquid detergent flushes. The last two runs were made using a standard ball, one run with fabric softener and one run with liquid detergent.

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Testing cont.Testing cont.Testing cont.Testing cont.

1D Self-flush 30 min 174-180F 43 gpm Clean2D Self-flush 30 min 174-180F 42 gpm Clean3D Self-flush 30 min 174-180F 41 gpm Clean1T* Self-flush 30 min 174-180F 41 gpm Some bubbles**2T* Self-flush 30 min 174-180F 41 gpm Clean3T* Self-flush 30 min 174-180F 42 gpm Clean1D Standard Standaed 30 min 174-180F 43 gpm Cavity filled with fabric softener1T Standard* Standaed 30 min 174-180F 42 gpm Cavity filled with liquid detergent

* Bled and fed water during flush because of high bubble concentration in water. Bubbles reduced on flush 1T, but not eliminated. On 2T and 3T bubbles nearly eliminated.** Bubbles in flush water and on all surfaces which rapidly disappeared with time. See photograph below.

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Testing cont.Testing cont.Testing cont.Testing cont.

As evidenced by the photographs, the flushes with the self-flushing ball cleaned the valve extremely well, regardless of product, as evidenced by the absence of the light blue fabric softener or darker blue liquid detergent. The flushes with a standard ball did not clean up with either product. When the end fitting bolting was loosened the product ran out of the cavity (see photographs). The standard ball was not expected to clean up but was tested for comparative purposes.

Conclusions

The self-flushing ball is extremely effective in cleaning the valve using the products tested and for the time, temperature, and velocity tested (5 fps). The final two runs show what the internals’ appearance if a standard ball is used.

Prepared by,

K. R. Graham September 10, 2004Project EngineerPBM, Inc.

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Test FacilityTest FacilityTest FacilityTest Facility