Mechanical Pressure Switches - PVD · Mechanical Pressure Switches for overpressure, vacuum pressure and differential pressure KOBOLD Messring GmbH Nordring 22-24 D-65719 Hofheim/Ts

● Switching range:-250…+100 mbar,1…16 mbar to 16…63 bar

● Temperature:max. 70°C

● Material:Copper, brass,stainless steel, perbunan

● Connection: G 1/2

Mechanical Pressure Switchesfor overpressure, vacuum pressure

and differential pressure

KOBOLD Messring GmbHNordring 22-24D-65719 Hofheim/Ts.� (06192) 299-0Fax (06192) 23398E-mail: [email protected]: www.kobold.com

5

01/0

202

/Ko

/10

measuring•

monitoring•

analysing

Model:SCH

KOBOLD offices exist in the following countries:

ARGENTINA, AUSTRIA, BELGIUM, BRAZIL, CANADA, CHINA, COLOMBIA, FRANCE, GREAT BRITAIN, NETHERLANDS, POLAND, SWITZERLAND, USA, VENEZUELA

The pressure applied in the sensor housing (1) acts on the measuring bellows (2). Pressure changes lead to movements of the measuring bellows (2) which are transferredthrough a pressure pin (4) to the switching rocker (5). The switching rocker is supported onhardened pivot points (6). As the pressure increases the switching rocker (5) moves upwards and operates the micro-switch (7). The spring (8), the initial stress of which can be changed by the setting screw (9) ( switching point setting), acts as opposing force. The traveling nut (10) is moved by turningthe setpoint spindle, and the initial stress of the spring (8) is changed. The screw (11) servesfor the internal adjustment of the microswitch. The counterpressure spring (12) ensures stable switching behaviour, evewn for low setting values.

With few exceptions in the low pressure range, all pressure sensors are equipped with measuring bellows, partly made of a copper alloy but mostly in high stainless steel quality(1.4571). In comparison with the permissible values, the measuring bellows are subject to lowloads and move only slightly. This results in long service life with low switching point drift andhigh overpressure safety. The movement of the measuring bellows is also restricted by aninternational stop so that the forces resulting from the overpressure can not be transmitted tothe switching mechanism.The parts of the sensor in contact with the medium are welded together without additionalmaterials and the sensor contain no seals. Cu bellows which are used for low pressure ranges are soldered to the sensor housing. The sensor housing and all parts in the unit incontact with the medium can also be manufactured completely in stainless steel 1.4571 (series DNS). The individual data sheets contain exact data on materials.

The pressure connection is designed in accordance with DIN 16288 for all pressure switches(pressure gauge connection G 1/2 A). They can also be connected optionally to the internalthread G 1/4 in accordance with ISO 228 Part 1. The centering pin must then be removed.Max. screw-down depth on the internal thread G 1/4 = 9 mm. When connected to the external thread G 1/2 with seal in the thread ( i.e. without the sealing washer customary in the pressure gauge connection), the centering pin must be removed. Differential pressure switches have two pressure connections (max. and min.) and must be connected to one internal thread G 1/4 each.

1 = pressure connection2 = measuring bellows3 = sensor housing4 = pressure pin5 = switching rocker6 = pivot points7 = microswitch or

other switching elements8 = setpoint spring9 = setting spindle

(switching point setting )10 = traveling nut

(switching point indicator )11 = adjusting screw for microswitch12 = counterpressure spring

Mode of operation

Pressure sensors

Pressure connection

Pressure switchesGeneral description

6 www.kobold.com No responsibility taken for errors; subject to change without prior notice.

01/0

202

/Ko

/10

Valid for all pressure switch with microswitches of the DCM, VCM, DNM, DNS, DDC series.The technical data of the component tested units deviate partly slightly. (Please refer to type sheet)

Switch housing

The most important technical data

G 1/2 external thread (pressure gauge connection) and G 1/4 internal thread.Internal thread G 1/4 at differential pressure switches DDCM.

Higher medium temperatures are possible if the above limit values at the switching mechanism are ensured by suitable measures (e.g. siphon)

All pressure switches can operate under vacuum, the device is not damaged by this.

< 1% of the working range ( for pressure ranges > 1 bar)

Upto 4 g no noteworthy deviations.The switching difference is reduced slightly at higher accelerations. Use able 25 g not permissible.

With sinusoidal pressure application and room temperature, 10 x 106 switching cycles. The expected life depends strongly upon the type of pressure application, therefore this figure can serve only as rough estimate. With pulsating pressure or pressure impacts in hydraulic systems, pressure surge reduction is recommanded..

Overvoltage category III, contamination class 3, reference surge voltage 4000 V. The confirmity to DIN VDE 0110 ( 01.89) will be confirmed.

The parts of all pressure switches in contact with the medium are oil and grease-free.The sensors are hermetically encapsulated, they contain no seals.

Arbitrary preferably verticalSee data sheet

IP 54 (on request IP 65 by ZF351)

-

-

Plug connection (200 series) orTerminal connection (300 series)

Pg 11

See data sheets

Adjustable on the spindle. In switching mechanism 300 the terminal box lid must be removed.

Adjustable or not adjustable (see type overview)

Max. 70°C, briefly 85 °C

Vertical

IP 65

Eex de IIC T6 tested to EN50014/50018/50019 (CENELEC)

Ex 90.C.1059

Terminal connection

Pg 11

-15 to +60°C

Adjustable on the spindle after the terminal box is removed.

Not adjustable

Max. 60°C

Aluminium diecast GD Al Si 12 Aluminium diecast GD Al Si 12

Floating change-over contact. With rising pressure switching oversingle-pole from 3-1 to 3-2

Floating change-over contact. With rising pressure switching over single-pole from 3-1 to 3-2

8 A at 250 VAC5 A at 250 VAC inductive 8 A at 24 VDC0.3 A at 250 VDC

3 A at 250 VAC2 A at 250 VAC inductive3 A at 24 VDC0.03 A at 250 VDC

Normal version -version

Switching function and connection drawing (applies only for version with microswitch)

Pressure connection

Switching capacity(applies only for version with microswitch)

Installation position

Degree of protection ( in vertical position)

Ex degree of protection

PTB approval

Electrical connection

Cable entry

Ambient temperature

Switching point

Switching difference

Medium temperature

Vacuum

Repetition accuracy of the switching points

Vibration strength

Mechanical life

Insulation values

Oil and grease-free

7www.kobold.comNo responsibility taken for errors; subject to change without prior notice.

01/0

202

/Ko

/10

Normal versionmicroswitch, single pole switching over,switching differential not adjustable

Maximum limiter with manual reset device. Interlocking with increasing pressure.

Minimum limiter with manual reset device. Interlocking with falling pressure.

Two microswitches, switching in parallel or in succession. Fixed switching interval.Terminal connection case

Two microswitches, switching in succession, 1 plug adjustable switching interval.

Gilded contactsCannot be supplied with adjustable switching differential.

Switching capacity max. 24 VDC,100 mA min. 5 VDC, 2 mA

Adjustment according to customer's instruction:one switching pointtwo switching points or defined switching differential

Adjustment and sealing according customer's instruction:one switching pointtwo switching points or defined switching differential

Special packing for oil- and grease-free storage

Description Connection diagrams Explanation

ZF 205

ZF 206

ZF 217

ZF 213

Pressure switchesSwitch units / optional function / connection diagrams

ZF


Specify the switching pointand the direction of action

ZF 307

01/0

202

/Ko

/10

Pressure switches with special equipment can also be used in the Ex area ≥ Zone 1.

Pressure monitoring in explosion-endangered areas

The following alternatives are possible:

1. Pressure switch with pressure-proof encapsulated switching device, degree of protection EEx de IIC T6.

The pressure switch in pressure-proof encapsulation can be used directly in the Ex area (≥ Zone 1). Maximum switching voltage, switching capacity and ambient temperature must be taken into account and the rules for the installation in the Ex area must be observed.

All pressure switches can be equipped with Ex switching mechanisms.

Special circuits as well as versions with adjustable switching differences are notpossible.

2. Pressure switches in EEx-i-versionAll pressure switch in normal version can be used in the Ex area ≥ Zone 1 if they are incorporated in an "intrinsically safe circuit". In principle the intrinsic safety isbased on that fact that the control circuit run in the Ex area carries only a smallamount of energy which is not able to generate ignitable sparks.

Isolating switching amplifiers, e.g. Type REL-6000 must be tested by the PTBand approved for Ex-installations.

Isolating switching amplifiers must be in any event installed outside the Ex zone.

Pressure switches which are intended for EEx-ia installations can be equippedwith blue terminals and cable entries. Because of the low voltages and currentswhich are carried by the contacts of the microswitch, gold plated contacts arerecommanded (additional function ZF 513).

Order Example

SCH-DCM 6 - 205

Code of Switching unit (e.g. maximum limiter)Code of switching range Sensor system

Order specification:

Pressure switch

SCH-DCM-6-205or SCH-DCM 6 with ZF 205


01/0

202

/Ko

/10

Steam and hot water

Pressure monitors and pressure limiters for seam and hot water in systems to DIN 4751 P2 and TRD 604.Series DA and DWR.

VdTÜVPressure 100/1

Component tests

Fuel gases CE

Pressure monitors and limiters for fuel gases in accordance with DVGW Worksheet G-260. Series DGM and DWR.

Liquid fuels

Pressure monitors and pressure limiters for liquid fuels (heating oil).Serie DWR.

Pressure limiters in safety emgineering

For safety-relevant pressure monitoring in liquid gas systems, chemical and processing engineering systems.

-versions

For Ex areas ≥ Zone 1, all pressure switches can be delivered in pressure-proof encapsulated design (Ex degree of protection EEx de II C T6).PTB approval: Ex 90.C.1059

For intrinisically safe control circuits ( Ex degree of protection EEx-ia), the pressure switches can be delivered with gold contacts, proximity switches as well as with the blue terminals and cable entries customary in the EEx-i area. An isolating switching amplifier, which transfer the control commands of the pressure switch form an intrinsically safe control circuit ( EEx-ia) into a not intrinsically safe active circuit, is required in addition to the pressure switch.

DVGWDIN 3398 T.1 and 3

TÜVDIN 3398 T.4

TÜVPressure 100/1 + DIN 3398 T.4

EEx de II CT6(pressure proof encapsulated)

EEx-ia(intrinsically safe)

Switch housing with switching mechanismsThe switch housings consist of high quality and seawater-resistant aluminium diecastings.Three versions are available:

Housing (normal version )

Plug connections to DIN 43650Degree of protection IP 54Setpoint setting accessible from the outside.

Terminal connection

With terminal connection boxDegree of protection IP 54, on request IP 65Setpoint setting and terminal connections accessible only after removal of the terminal box lid.

-Housing (EEx-d version)

All pressure and differential pressure switches can be equipped with these switch housings and are thus approved for EX ≥ 1.Degree of protection IP 65Ex degree of protection EEx de IIC T6.

10 www.kobold.com

IP 54

IP 54(IP 65)

IP 65

No responsibility taken for errors; subject to change without prior notice.

01/0

202

/Ko

/10

1.2 Minimum pressure limiration

Switching over and locking with falling pressure.Additional function: 206, 306

Connection to terminal 2 and 3.

In limiter functions it is frequently necessary to retain and lock the shutdown status and to release the lock and switch on the system again only after the causes that ledto the safety shutdown have been eliminated.There are two possibilities for this:

1. Mechanical lock inside the pressure switch

A "bistable" microswitch is built into the limites instead of the microswitch with automatic reset.

When the value set on the scale is reached, the microswitch switches over and remainsin this position. The lock must be released by pressing the unlocking button (markedby a red dot on the scale side of the switching device). According to version, the lockcan be effective with rising or falling value. Unlocking can take place only if the pressure has dropped by a certain amount or in the case of locking it has risen back tothe lower switching point.

When the pressure limiter is selected, a distinction must be made between maximumpressure and minimum pressure monitoring.

Ex-versions cannot be delivered with internal locking.

Pressure limiters with switching status lock (restart lockout)

1.1 Maximum pressure limiration

Switching over and locking with rising pressure.Additional function: 205, ZF 305

Connection to terminal 1 and 3.

2. External electrical interlock in the switchgear cabinet

A pressure monitor (microswitch with automatic reset) can also be used as limiter if an electrical interlock in connected in series.In pressure limitation in steam and hot water boilers, the external interlock is permissible only if it is ensured that the pressure monitor is of "special construction".

When the interlock circuit shown above is used, the requirements in accordance with DIN 57 116/VDE 0116 are fulfilled if the electrical equipment such as contactors or relays of the external interlock circuit correspond to VDE 0660 or VDE 0435 respectively.

2.1 Maximum pressure limitation with external interlock

2.2 Minimum pressure limitation with external interlock

DW =pressure monitorT1 =STOPT2 =STARTS =signal (as required)K1 =relay with self-hold

DW =pressure monitorT1 =STOPT2 =STARTS =signal (as required)K1 =relay with self-hold

Safety circuit Safety circuit


01/0

202

/Ko

/10

SCH-DCM Pressure switches and Pressure monitors for overpressurefor non aggressive liquid and gaseous media


Summary of types

01/0

202

/Ko

/10

Technical DataPressure connectionExternal thread G1/2 A (pressure gaugeconnection) acc. to DIN 16 288 and internal thread G1/4 to ISO 228 part 1.

Switching deviceRugged housing (200) of seawater resistant aluminium die casting GD Al Si 12.

ProtectionIP54, with vertical fitting position.

Pressure sensing elementDCM 3…DCM 63Metal bellows: 1.4571Sensor casing: 1.4104DCM 025-DCM 1Metal bellows: Cu ZnSensor casing: CuZn (Ms)DCM 4016/DCM 4025Diaphragm: PerbunanSensor casing: 1.4301

Fitting positionVerticaly upwards and horizontalDCM 4016 and 4025 vertically upwards.

Max. ambient temperatureat the switch unit-25…+70°CException : DCM 4016DCM 1000 : -15…+60°CEEx-d versions: -15…60°C

Max. temperature of the mediumThe maximum temperature of the medium at the pressure sensing element must not exceed the allowable temperature at the switching device.

Temperatures up to 85 °C are allowable forshort periods.Higher temperatures of the medium are possible, provided that the upperlimit at the switching device is safeguarded by suitable measures (e.g. water tube trap).

FittingDirectly in the pressure line (pressure gaugeconnection) or on a flat surface with 2 – off 4 mm screws.

Switching pressureAdjustable externally by means of screw-driver.

Switching differentialNot adjustable in the case of DCM and Ex-DCM. Externally adjustable in the case ofDCMV. For values see Summary of types.

Methods of sealingAs required (may also be carried out after mounting).

AdjustmentScale value corresponds to the lower switching point, the upper switching point ishigher by the switching differential.

Contact agreementSingle-pole change-over switch.

Switching capacity

250 V~ 250 V- 250 V-

Normal 8 A 5 A 0.3 A 8 A

EEx-d 3 A 2 A 0.03 A 3 A

(ohm) (ind) (ohm) (ind)

Switching difference not adjustable

SCH-DCM 40251-16 mbar 2 mbar 1 bar 1 + 11SCH-DCM 40164 - 25 mbar 2 mbar 1 bar 1 + 11

SCH-DCM 1000 10 -100 mbar 12 mbar 10 bar -SCH-DCM 025 0.04 - 0.25 bar 0.03 bar 6 bar 1 + 14SCH-DCM 06 0.1- 0.6 bar 0.04 bar 6 bar 1 + 14SCH-DCM 1 0.2 - 1.6 bar 0.04 bar 6 bar 1 + 14SCH-DCM 3 0.2 - 2.5 bar 0.1 bar 16 bar 1 + 15SCH-DCM 6 0.5 - 6 bar 0.15 bar 16 bar 1 + 15

Range of adjustment

Switching difference(Mean val.)

Max. allowablepressure

Dimens. drawing

Model

SCH-DCM 625 0.5 - 6 bar 0.25 bar 25 bar 1 + 15SCH-DCM 10 1 -10 bar 0.3 bar 16 bar 1 + 15SCH-DCM 16 3 -16 bar 0.5 bar 25 bar 1 + 15SCH-DCM 25 4 - 25 bar 1 bar 60 bar 1 + 15SCH-DCM 40 10 - 40 bar 1.3 bar 60 bar 1 + 15SCH-DCM 63 16 - 63 bar 2 bar 130 bar 1 + 15

PerbunanPerbunanPerbunanCu + MsCu + MsCu + Ms1.41041.41041.41041.41041.41041.41041.41041.4104

Material

Switching difference adjustableSCH-DCMV 025 0.04 - 0.25 bar 0.03 - 0.04 bar 6 bar 1 + 14SCH-DCMV 06 0.1- 0.6 bar 0.04 - 0.5 bar 6 bar 1 + 14SCH-DCMV 1 0.2 - 1.6 bar 0.07- 0.55 bar 6 bar 1 + 14SCH-DCMV 3 0.2 - 2.5 bar 0.15 -1.5 bar 16 bar 1 + 15SCH-DCMV 6 0.5 - 6 bar 0.25 - 2.0 bar 16 bar 1 + 15SCH-DCMV 10 1 -10 bar 0.5 - 2.8 bar 16 bar 1 + 15SCH-DCMV 16 3 -16 bar 0.7- 3.5 bar 25 bar 1 + 15SCH-DCMV 25 4 - 25 bar 1.5 - 6.0 bar 60 bar 1 + 15SCH-DCMV 40 10 - 40 bar 2.0 - 6.6 bar 60 bar 1 + 15SCH-DCMV 63 16 - 63 bar 3.0 -10 bar 130 bar 1 + 15

Cu + MsCu + MsCu + Ms1.41041.41041.41041.41041.41041.41041.4104

For smaller pressure ranges see also VCM, DGM and HCD data sheets. The above pressu-re switches can also be supplied with optional functions, see ZF data sheet.

-version, Ex-degree of protection EEx-dSCH-Ex-DCM 4016 1- 16 mbar 2 mbar 1 bar 3 + 11SCH-Ex-DCM 4025 4 - 25 mbar 2 mbar 1 bar 3 + 11

PerbunanPerbunan

Ordering specification

Pressure switch with plug connection, housing of aluminium die casting,adjustment range from … to … bar / mbarswitching differential adjustable/non-adjustableModel…

All parts of the DNM series of pressure switches which come into contact with the mediumare made of stainless steel. They are especially suitable for aggressive water and for NH3. The pressure sensor is welded by the most up-to-date method without added material. The aluminium switch housing has a high resistance to the corrosive effects of the ambient atmosphere.

Pressure switches with sensor systemin stainless steel versionSCH-DNM

Summary of types


250 V~ 250 V- 250 V-

Normal 8 A 5 A 0,3 A 8 A

EEx-d 3 A 2 A 0.03 A 3 A


01/0

202

/Ko

/10


SCH-DNM 60.04 - 0.25 bar 0.03 bar 6 bar 1 + 16SCH-DNM 025

0.5 - 6 bar 0.15 bar 16 bar 1 + 15SCH-DNM 625 0.5 - 6 bar 0.25 bar 25 bar 1 + 15SCH-DNM 10 1 -10 bar 0.3 bar 0.3 bar 1 + 15SCH-DNM 16 3 -16 bar 0.5 bar 0.5 bar 1 + 15SCH-DNM 25 4 - 25 bar 1.0 bar 1.0 bar 1 + 15SCH-DNM 40 10 - 40 bar 1.33 bar 1.3 bar 1 + 15SCH-DNM 63 16 - 63 bar 2.0 bar 2.0 bar 1 + 15

Ex-degree of protection EEx-i: with ZF 512 or ZF 513.Example of ordering: SCH-DNM..513

Switching difference adjustable

SCH-DNMV 160.5 - 6 bar 0.25 – 2,0 bar 16 bar 1 + 15SCH-DNMV 63 -16 bar 0.7–3,5 bar 25 bar 1 + 15

SCH-DNMV 40 10 - 40 bar 2.0 – 6,6 bar 60 bar 1 + 15SCH-DNMV 63 16 - 63 bar 3.0 –10 bar 130 bar 1 + 15

-version, Ex-degree of protection

SCH-Ex-DNM 51615 - 60 mbar 10 mbar 5 bar 3 + 12SCH-Ex-DNM 50640 -160 mbar 12 mbar 5 bar 3 + 12

SCH-Ex-DNM 525 100 - 250 mbar 20 mbar 5 bar 3 + 12SCH-Ex-DNM 06 0.1- 0.6 bar 25 mbar 6 bar 3 + 16SCH-Ex-DNM 1 0.2 -1.6 bar 30 mbar 6 bar 3 + 16SCH-Ex-DNM 3 0.2 - 2.5 bar 60 mbar 16 bar 3 + 15SCH-Ex-DNM 6 0.5 - 60 bar 0.10 bar 16 bar 3 + 15SCH-Ex-DNM 625 0.5 - 60 bar 0.20 bar 25 bar 3 + 15SCH-Ex-DNM 16 3 -16 bar 0.2 bar 25 bar 3 + 15SCH-Ex-DNM 25 4 - 25 bar 0.5 bar 60 bar 3 + 15SCH-Ex-DNM 40 10 - 40 bar 0.7 bar 60 bar 3 + 15SCH-Ex-DNM 63 16 - 63 bar 1.0 bar 130 bar 3 + 15

Range of adjustment


(Mean value)


Dimens. drawing

Model


Switching deviceRugged housing (200) of seawater resistantaluminium die casting GD Al Si 12.

ProtectionIP54, with vertical fitting position.IP65 with EEx-d version.

Pressure sensing elementX 12 Cr Mo S17Material No.: 1.4104DCM025-DCM1

Fitting positionVerticaly upwards and horizontal.

Max. ambient temperatureat the switch unit-25…+70°CEEx-d versions: -15…60°C

Max. temperature of the mediumThe maximum temperature of the medium at the pressure sensing elementmust not exceed the allowable temperature at the switching device.

Temperatures up to 85°C are allowable forshort periods. Higher temperatures of the medium are possible, provided that the upperlimit at the switching device is safeguarded by suitable measures (e.g. water tube trap).

FittingDirectly in the pressure line (pressure gauge connection) or on a flat surface with 2 – off 4 mm screws.


Switching differentialNot adjustable on DNM and Ex-DNM. Adjustable on DNMV.For values see Summary of types.


AdjustmentScale value corresponds to the lower switching point, the upper switching point is higher by the switching differential.


Switching capacity

The FEMA Negative Pressure Switches detect the pressure difference relative to the atmos-pheric pressure. All data on switching pressure ranges and therefore also the scala divisionson the switch units are to be understood at the difference in pressure between the atmos-pheric pressure at any one time and the set switching pressure. The "zero" reference point on the scale of the unit corresponds to the atmospheric pressure at the time.

Negative Pressure Switch(Vacuum Switch)SCH-VCM

*In the case of very high vacuum, close to the negative pressure of -1 bar which is onlytheoretically possible, the switch can be adjusted only with reservations on account of thespecial conditions of vacuum technology. The pressure switch itself will however not be damaged at maximum negative pressure.

Above pressure switches can also be supplied with the optional functions see ZF data sheet.For small pressure ranges see HCD data sheet.


250 V~ 250 V- 250 V-



Summary of types

01/0

202

/Ko

/10



ProtectionIP54, with vertical mounting position.IP65, with EEx-d version

Pressure sensing elementVNM111 and VNM301Metal bellows: 1.4571Sensor casing: 1.4104VCM095, 101 and 301:Metal bellows: Cu ZnSensor casing: CuZnVCM4156Diaphragm: PerbunanSensor casing: 1.4301

Fitting positionVerticaly upwards and horizontal.VCM4156 vertically upwards.



Temperatures up to 85 °C are allowable forshort periods. Higher temperatures of the medium are possible, provided that the upperlimit at the switching device is safeguarded by suitable measures (e.g. water tube trap).

FittingDirectly in the pressure line (pressure gaugeconnection) or on a flat surface with 2 – off 4 mm screws.


Switching differentialNot adjustable on VCM and Ex-VCM. Adjustable on VCMV.For values see Summary of types.


AdjustmentScale value corresponds to the lower switching point, the upper switching point ishigher by the switching differential.


Switching capacity


SCH-VCM 301-15 to + 6 mbar 2 mbar 1 bar 1 + 11SCH-VCM 4156

- 250 to +100 mbar 25 mbar 1.5 bar 1 + 13SCH-VNM 301 - 250 to +100 mbar 45 mbar 3 bar 1 + 16SCH-VCM 101 -1* to + 0.1 bar 45 mbar 3 bar 1 + 14SCH-VCM 095 - 0.9 to + 0.5 bar 50 mbar 3 bar 1 + 14SCH-VNM 111 -1* to + 0.1 bar 50 mbar 6 bar 1 + 16


SCH-VNMV 301- 250 to +100 mbar 30 - 200 bar 1.5 bar 1 + 13SCH-VCMV 301- 250 to +100 mbar 70 - 450 bar 3 bar 1 + 16

SCH-VCMV 101 -1* to + 0.1 bar 80 - 350 bar 3 bar 1 + 14SCH-VCMV 095 - 0.9 to + 0.5 bar 90 - 400 bar 3 bar 1 + 14

Range of adjustment


(Mean value)


Dimens. drawing

Model

SCH-VNMV 111 -1* to + 0.1 bar 90 - 650 bar 6 bar 1 + 16

The FEMA differential pressure monitors are suitable for monitoring and controlling differentialpressures, flow monitoring and automatic checking of filter plants.A double chamber system with stainless steel bellows resp. perbunan diaphragm accuratelydetects the difference between the two applied pressures. The differential pressure to be monitored is infinetely adjustable within the ranges mentioned in the summary of types. The settings relate to the lower switching point (in the case of falling differential pressure); theupper switching point (in the case of rising differential pressure) is the value of the switchingdifferential higher. All differential pressure control switches can also be used in the negative pressure area. Everypressure switch has two pressure connections.

Technical DataPressure connectionInternal thread G1/2 A


ProtectionIP54, with vertical mounting position.IP65, with EEx-d version

Pressure sensing elementDDCM 1-16 :pressure bellows: 1.4571sensor casing: 1.4305DDCM 252-6002 :diaphragm of perbunan.Sensor casing of aluminium.

Installation positionOptional, preferably vertically upwards.



Temperatures up to 85 °C are allowable forshort periods.Higher temperatures of the medium are possible, provided that the upperlimit at the switching device is safeguarded by suitable measures (e.g. water tube trap).

FittingDirectly in the pressure line (pressure gauge connection) or on a flat surface with 2 - off 4 mm screws.S (-) = lower pressureP (+) = higher pressure


Switching differentialNot adjustable.For values see Summary of types.

AdjustmentScale value corresponds to the lower switching point, the upper switching point isthe switching differential higher.


ScaleTypes 252-6002 without graduation.Adjustment with a pressure gauge.

Switching capacity

Differential pressure monitors

For optional functions see ZF data sheet.For smaller pressure ranges see HCD data sheet.*Keine Skaleneinteilung, nur +/- Skala

Example for Application

Order specificationDifferential pressure monitor with plug connection, casing of die-cast aluminiumSensor casing of stainless steel / aluminiumRange of adjustment …to ….bar / mbarModel …..

SCH-DDCM

Pump monitoringFilter monitoring


250 V~ 250 V- 250 V-



Summary of types

SCH-DDCM 1-16 SCH-DDCM 252-60002

01/0

202

/Ko

/10

SCH-DDCM 662*4 - 25 mbar 2 mbar 0.5 bar 1 + 17SCH-DDCM 252*10 - 60 mbar 15 mbar 1.5 bar 1 + 17

SCH-DDCM 1602 20 -160 mbar 20 mbar 3 bar 1 + 17SCH-DDCM 6002 100 - 600 bar 35 mbar 3 bar 1 + 17SCH-DDCM 1 0.2 -1,6 bar 0.13 bar 15 bar 1 + 18SCH-DDCM 6 0.5 - 6 bar 0.2 bar 15 bar 1 + 18

Range of adjustment


(Mean value)

Max. pressureP1 or P2

Dimens. drawing

Model

SCH-DDCM 16 3 -16 bar 0.6 bar 25 bar 1 + 18

The pressure switches of series DNS are suitable for monitoring and controlling pressures indevices of the chemical industry and in the process engineering as well as wherever the pres-sure of aggressive liquids and gases has to be monitored. All component parts of the sensorsystem are made of stainless steel (1.4571) and are welded by using the latest techniqueswithout additional materials. The pressure sensor is hermetically encapsulated and does notcontain any seal material.

Pressure switches with stainless steelsensor systemoptionally housing with surface protection

Ex-degree of protectoion EEx-i with ZF 512 or ZF 513Example for ordering: DNS…-513* In the case of very high vacuum, close to the negative pressure or -1 bar which is only theoretically possible, theswitch can be adjusted only with reservations on account of the special conditions of vacuum technology. Thepressure switch itself will however not be damaged at maximum negative pressure.

SCH-DNS


Summary of types

Plastic coatingThe die cast aluminum housing is chromedand coated with chemical resistant plastic. This coating wad tested for 20 days with a 3% NaCI solution. During this test, the temperature was changed 30 times between+10 to 80°C. The quality of the coating was not changedduring this test.

01/0

202

/Ko

/10


Switching deviceRugged housing (200) of seawaterresistant aluminium die castingGD Al Si 12.

ProtectionIP54, with vertical fitting position.IP65, with EEx-d version

Pressure sensing elementPressure bellow, and all parts connected to media:X 6 Cr Ni Mo Ti 17 122Material No. 1.4571

Fitting positionVertically upwards and horizontal.

Max. ambient temperatureat the switch unit+70°C


Temperatures up to 85 °C are allowable forshort periods. Higher temperatures of the medium are possible, provided that the upperlimit at the switching device is safeguarded bysuitable measures (e.g. water tube trap).

FittingDirectly in the pressure line (pressure gauge connection) or on a flat surface with 2 - off 4 mm screws.

Switching differentialSee Summary of types.


Adjustment

Scale value corresponds to the lower switching point, the upper switching point ishigher by the switching differential.


Switching capacity

250 V~ 250 V- 250 V-


EEx-d 3 A 2 A 0.03 A 3 A



SCH-VNS 111-201-250 to +100 mbar 45 mbar 3 bar 1 + 16SCH-VNS 301-201

-1* to + 0.1 bar 50 mbar 6 bar 1 + 16SCH-DNS 025-201 0.04 - 0.25 bar 30 mbar 6 bar 1 + 16SCH-DNS 06-201 0.1- 0.6 bar 40 mbar 6 bar 1 + 16SCH-DNS 1-201 0.2 -1.6 bar 60 mbar 6 bar 1 + 16SCH-DNS 3-201 0.2 - 2.5 bar 0.1 bar 16 bar 1 + 15SCH-DNS 6-201 0.5 - 6 bar 0.15 bar 16 bar 1 + 15SCH-DNS 10-201 1-10 bar 0.3 bar 16 bar 1 + 15

Range of adjustment


(Mean value)


Dimens. drawing

Model

SCH-DNS 16-201 3 -16 bar 0.5 bar 25 bar 1 + 15

Housing with surface protection

SCH-VNS 111-201-250 to +100 mbar 45 mbar 3 bar 2 + 16SCH-VNS 301-201

-1* to + 0.1 bar 50 mbar 6 bar 2 + 16SCH-DNS 025-201 0.04 - 0.25 bar 30 mbar 6 bar 2 + 16SCH-DNS 06-201 0.1- 0.6 bar 40 mbar 6 bar 2 + 16SCH-DNS 1-201 0.2 -1.6 bar 60 mbar 6 bar 2 + 16SCH-DNS 3-201 0.2 - 2.5 bar 0.1 bar 16 bar 2 + 15SCH-DNS 6-201 0.5 - 6 bar 0.15 bar 16 bar 2 + 15SCH-DNS 10-201 1-10 bar 0.3 bar 16 bar 2 + 15SCH-DNS 16-201 3 -16 bar 0.5 bar 25 bar 2 + 15

-version, Ex-degree of protection EEx-d

SCH-Ex-VNS 111-250 to +100 mbar 45 mbar 3 bar 3 + 16SCH-Ex-VNS 301

-1* to + 0.1 bar 50 mbar 6 bar 3 + 16SCH-Ex-DNS 025 0.04 - 0.25 bar 30 mbar 6 bar 3 + 16SCH-Ex-DNS 06 0.1- 0.6 bar 40 mbar 6 bar 3 + 16SCH-Ex-DNS 1 0.2 -1.6 bar 60 mbar 6 bar 3 + 16SCH-Ex-DNS 3 0.2 - 2.5 bar 0.1 bar 16 bar 3 + 15SCH-Ex-DNS 6 0.5 - 6 bar 0.15 bar 16 bar 3 + 15SCH-Ex-DNS 10 1-10 bar 0.3 bar 16 bar 3 + 15SCH-Ex-DNS 16 3 -16 bar 0.5 bar 25 bar 3 + 15

Summary of typesMaximum pressure monitoring (�)Pressure monitors without differential adjustment for max. pressure monitoring

Pressure monitors and pressure limiters for steam and hot water

Steam Systems according to TRD 604Hot water Systems acc. to DIN 4751, P.2

*The maximal permissible operating pressure is defined as the upper limit at which the operation, the switching reliability and the water tightness of the pressure switch are in no way impaired.

The pressure monitors DWAM… can also be used for maximum pressure limitation, byusing an external interlock.

Minimum Pressure monitoring (�)The types DWUM… and DBUM… are substituted by DWR-series.

SCH-DWAM/SDBAM

Component tested for

TÜV Registration-No.

Testing basis

Function


250 V~ 250 V- 250 V-



VdTÜV-Memorandum "Druck 100/1"

TÜV · DW 94-132 for series DWAM...TÜV · DW 94-133 for series DWAMV...TÜV · DW 94-134 for series SDBAM...

Registration-No.

Pressure monitor / Pressure limiterFor max. pressure monitoring

"Of special construction" due to self monitoring

SealingGenerally available for safety pressure limiting devices SDBAM. For pressure monitor switches upon request.

Bursting pressureFor all types ≥ 100 bar. Verified by TÜV test.

01/0

202

/Ko

/10


Switching deviceRugged housing (200) of alum. die casting GD Al Si 12 (Good resistance of seawater).

MaterialsPressure bellows: Material No. 1.4571Sensor casing: Material No. 1.4104Switching casing: GD-AI Si 12according DIN 1725

Fitting positionVertically upwards and horizontal.Ex-versions: only vertically.

Ambient temp. at the switching unit-20 to +70°C

Max. temperature of the medium-20 to +70°CThe maximum temperature of the medium at the pressure sensing element must not exceed the allowable temperature at the switching device.Temperatures up to 85 °C are allowable forshort periods. Higher temperatures of the medium are possible, provided that the upperlimit at the switching device is safeguarded bysuitable measures (e.g. water tube trap).

FittingDirectly in the pressure line (pressure gaugeconnection) or on a flat surface with 2 off 4 mm screws.

AdjustmentIn the case of max. pressure switches:The pressure monitors and the safety pressure limiting devices are adjusted so thatwith increasing pressure the change-overtakes place at the set switching pressure.Switching back when pressure falls occurs ata pressure which is lower by the amount of the switching differential or, in the case ofpressure limiting devices and safety limitingdevices, by the falls in pressure specified in the table. The scale value corresponds to theupper switching point.

Switching differential See Table of types.


Switching capacity

SCH-DWAM 60.2 -1.6 bar 0.05 bar 5 bar 1 + 16SCH-DWAM 11.2 - 6 bar 0.2 bar 10 bar 1 + 15

SCH-DWAM 16 3 -16 bar 0.4 bar 20 bar 1 + 15SCH-DWAM 32 6 - 32 bar 1.2 bar 40 bar 1 + 15

Range of adjustment


(Mean value)

Maximum*operatingpressure

Dimens. drawing

Model

Pressure monitors with differential adjustment for max. pressure monitoring

SCH-DWAMV 60.2 -1.6 bar ≤ 0.12 ≥ 0.6 bar 5 bar 1 + 11SCH-DWAMV 11.2 - 6 bar ≤ 0.4 ≥ 1.5 bar 10 bar 1 + 13

SCH-DWAMV 16 3 -16 bar ≤ 0.8 ≥ 2.5 bar 20 bar 1 + 16SCH-DWAMV 32 6 - 32 bar ≤ 2.5 ≥ 6.0 bar 45 bar 1 + 14

Pressure limiters for maximum pressure monitoring

SCH-SDBAM 2.50.2 -1.6 bar 0.12 bar 5 bar 1 + 16SCH-SDBAM 10.4 - 2.5 bar 0.15 bar 5 bar 1 + 16

SCH-SDBAM 6 1.2 - 6 bar 0.4 bar 10 bar 1 + 15SCH-SDBAM 625 1.2 - 6 bar 0.6 bar 20 bar 1 + 15SCH-SDBAM 16 3 -16 bar 0.8 bar 20 bar 1 + 15SCH-SDBAM 32 6 - 32 bar 3.0 bar 45 bar 1 + 15

TÜVTESTED

Pressure monitors for steam and hot water, fuel gases and liquid fuels

Column 1: for devices according to DIN 3398, Part 3 (gas pressure monitors)

Column 2: for devices according to pressure 100/1 and DIN 3398, Part 4 ( for steam. hot water and liquid fuels)

SCH-DWR

ProtectionIP54 according to DIN 40 050IP65 (alternative version)

Ex ingnition degree of protectionEEx-i with ZF 513.

Possibility of lead sealingOn request (can also be fitted subsequently)


SteamHot waterBurnable gases Liquid fuels


Testing basis

Function

Direction of action

Registration No.

Systems acc. to TRD 604Systems acc. to DIN 4751,T.2DVGW work sheet G 260 e.g. fuel oils

DWFS, SDBFS)

TÜV.DWFS (SDBFS) 00-281NG-4346 AQ 14113 C02 895

Pressure 100/1, Issue 4.83DIN 3398, P.3, Issue 11.82DIN 3398, P.4, Issue 10.86

Pressure monitor or Pressure limiter (with external interlock)

For max. pressure andmin. pressure monitoring

"Of special construction" by test with 2 million Switching cycles

Type overview

250 V~ 250 V- 250 V-



01/0

202

/Ko

/10


SCH-DWR 10.1- 0.6 bar 0.04 bar 6 1 + 16SCH-DWR 060.2 -1.6 bar 0.06 bar 6 1 + 16

SCH-DWR 3 0.2 - 2.5 bar 0.1 bar 16 1 + 15SCH-DWR 6 0.5 - 6 bar 0.2 bar 16 1 + 15SCH-DWR 625 0.5 - 6 bar 0.25 bar 25 1 + 15SCH-DWR 16 3 -16 bar 0.5 bar 25 1 + 15SCH-DWR 25 4 - 25 bar 1.0 bar 63 1 + 15SCH-DWR 40 10 - 40 bar 1.3 bar 63 1 + 15

Setting range Switching difference

(Mean value)

Max. operat.pressure (bar)

Dimens. drawing

Model

EEx-ia version with ZF 513


SCH-VNS 111-2010.1- 0.6 bar 2 + 16SCH-VNS 301-2010.2 -1.6 bar 2 + 16

SCH-DNS 025-201 0.2 - 2.5 bar 1 + 15SCH-DNS 06-201 0.5 - 6 bar 1 + 15SCH-DNS 1-201 3 -16 bar 1 + 15SCH-DNS 3-201 4 - 25 bar 1 + 15SCH-DNS 6-201 8 - 40 bar 1 + 15

1* 2*

66101020205050

0.08 - 0.5 bar 60.15 - 0.6 bar 60.17 -1.2 bar 160.3 -1.4 bar 16

0.75 - 3.15 bar 251.3 - 6.0 bar 632.3 - 6.6 bar 63

661010205050

Technical DataPressure connectionExternal thread G1/2 A (pressure gaugeconnection) acc. to DIN 16 288 and internalthread G1/4 acc. to ISO 228 part 1 (for gasapplications internal thread permissible only up to 4 bar).

Switching deviceStable housing (200) made of sea water resistant aluminium die casting.

MaterialsPressure bellows: Material No. 1.4571Probe housing: Material No. 1.4104Switch housing: GD-AI Si 12 (DIN 1725)

Installation positionVertical and horizontal.In Ex-versions only vertical.

Ambient temp. at the switching device-25 to +70°Cfor EEx-d version -15 to 60°C

Medium temperature-25 to +70°CThe maximum temperature of the medium at the pressure sensing element must not exceed the allowable temperature at the switching device.

Temperatures up to 85 °C are allowable forshort periods. Higher temperatures of the medium are possible, provided that the upperlimit at the switching device is safeguarded by suitable measures (e.g. water tube trap).

InstallationDirectly in the pressure line (pressure gaugeconnection) or on a flat surface with 2- off 4 mm screws.

Switching pressure:Adjustable from the outside by means of screwdriver. The scale value corresponds tothe lower switching point (for falling pressure),the upper switching point (for rising pressure)is higher by the switching difference.Exception: DWR...203.

Bursting pressureFor all types ≥ 100 bar.Verified by TÜV test.

Switching difference For values see type overview.

ContactsSingle-pole change-over switch.

Switching capacity

SCH-DWR-B

Technical DataPressure connectionExternal thread G1/2 A (pressure gaugeconnection) acc. to DIN 16 288 and internal thread G1/4 acc. to ISO 228 Part 1 (for gas applications internal threadpermissible only up to 4 bar).

Switching deviceStable housing (200) made of sea water resistant aluminium die casting.

MaterialsPressure bellows: Material No. 1.4571Probe housing: Material No. 1.4104Switch housing: GD-AI Si 12 (DIN 1725)

Installation positionVertical and horizontal.

Ambient temp. at the switching device-25 to +70°C

Medium temperature-25 to +70°CThe maximum temperature of the medium at the pressure sensing elementmust not exceed the allowable temperature at the switching device.Temperatures up to 85 °C are allowable for short periods.Higher temperatures of the medium arepossible, provided that the upper limit at the switching device is safeguarded bysuitable measures (e.g. water tube trap).

InstallationDirectly in the pressure line (pressure gauge connection) or on a flat surface with 2- off 4 mm screws.

Switching pressure:Adjustable externally by means of screwdriver.

Bursting pressureFor all types ≥ 100 bar.Verified by TÜV test.

Switching difference For values see summary of types.

ContactsSingle-pole change-over switch.

Switching capacity

Pressure limiters with manual resetfor steam and hot water, fuel gases and liquid fuels

ProtectionIP54 according to DIN 40 050IP65 (alternative version)


The pressure limiters are equipped with a reclosing lockout for the mechanical interlocking ofthe switch-off state. If the switching point set on the pressure limiter is reached, the limiterswitches off, the switch-off state is retained even if the pressure changes again. Switchingback is possible only by manual actuation of the reset button. The pressure at the sensor musthave lowered so that unlocking is possible (for maximum pressure limiters) or raised (for mini-mum pressure limiters). The values for the pressure change are listed in the summary of types.

Important: In the selection of the limiter, it is necessary to differentiate strictly wetherthe device is used for maximum or minimum pressure monitoring. It is not possible toreverse the direction of action at the pressure limiter.

Maximum operating pressure and dimensions as for type series DWR.

Pressure monitors SCH-DWR… (page 29) can also be used as minimum pressure and maximum pressure limiters with external interlock. See details on Page 13.

You will find further maximum pressure limiters with safety sensor, type series SDBAM…The types DWAM... can also be used with external interlock as maximum pressure limiters.


SteamHot waterBurnable gases Liquid fuels


Testing basis

Function

Direction of action

Registration No.

Systems acc. to TRD 604Systems acc. to DIN 4751,T.2DVGW work sheet G 260 e.g. fuel oils

SDBFS

TÜV.SDB/SDBF 00-28195.01 b 1873 C02 895

Pressure 100/1, Issue 4.83DIN 3398, P.3, Issue 11.82DIN 3398, P.4, Issue 10.86

Pressure monitor (with external interlock)

For max. pressure andmin. pressure monitoring

Maximum pressure limiters

Minimum pressure limiters

Sensor "Of special construction" by test with 2 million Switching cycles

250 V~ 250 V- 250 V-



01/0

202

/Ko

/10

SCH-DWR 1-2050.1- 0.6 bar 0.06 barSCH-DWR 06-2050.2 -1.6 bar 0.09 bar

SCH-DWR 3-205 0.2 - 2.5 bar 0.20 barSCH-DWR 6-205 0.5 - 6 bar 0.30 barSCH-DWR 625-205 0.5 - 6 bar 0.50 barSCH-DWR 16-205 3 -16 bar 0.70 barSCH-DWR 25-205 4 - 25 bar 1.4 barSCH-DWR 40-205 8 - 40 bar 2.3 bar

Setting range Pressurechance forunlocking

Connection diagrammModel

SCH-DWR 1-2060.1- 0.6 bar 0.06 barSCH-DWR 06-2060.2 -1.6 bar 0.09 bar

SCH-DWR 3-206 0.2 - 2.5 bar 0.20 barSCH-DWR 6-206 0.5 - 6 bar 0.30 barSCH-DWR 625-206 0.5 - 6 bar 0.50 barSCH-DWR 16-206 3 -16 bar 0.70 barSCH-DWR 25-206 4 - 25 bar 1.4 barSCH-DWR 40-206 8 - 40 bar 2.3 bar

20 www.kobold.com

SCH-DGM

Switching devices in EEx-i version with gold contacts.Max. switching capacity: 24 VDC 100 mA

Pressure measuring connectionIt must be ensured that a pressure measuring connection is available at a suitable place on the gas appliance.

Pressure monitors for fuel gases

DVGW-geprüft nach DIN 3398 Teil 1 und 3 und nachGasgeräterichtlinie 90/396 EEC

No responsibility taken for errors; subject to change without prior notice.

Summary of types

Die Gasdruckwächter sind für alle Gase nach DVGW-Arbeitsblatt G 260 und für Luft geeig-net. Geprüft nach den Anforderungen der DIN 3398 Teil 1 und Teil 3 Verordnung. Umgebungstemperatur -25°C bis 60°C. DVGW-Register-Nr. NG-4346 AP 1011. CE-Identnummer: CE-0085 AQ 1088.

01/0

202

/Ko

/10

SCH-DGM 31050 - 60 mbar 6 mbar 0.8 bar 1 + 13SCH-DGM 30620 -100 mbar 7 mbar 0.8 bar 1 + 13

SCH-DGM 325 40 - 250 mbar 10 mbar 0.8 bar 1 + 13SCH-DGM 06 100 - 600 mbar 25 mbar 2 bar 1 + 14SCH-DGM 1 0.2 -1.6 bar 40 mbar 3 bar 1 + 14SCH-DGM 506 15 - 60 mbar 10 mbar 5 bar 1 + 12SCH-DGM 516 40 -160 mbar 12 mbar 5 bar 1 + 12SCH-DGM 525 100 - 250 mbar 20 mbar 5 bar 1 + 12

Settingrange

Switching difference(Mean val.)

Max. operat.

pressure

Dimens. drawing

Model

Cu + MsCu + MsCu + MsCu + MsCu + Ms1.41041.41041.4104

Materialsin contact

with medium

SCH-DGM 310-51350 - 60 mbar 6 mbar 0.8 bar 1 + 13SCH-DGM 306-51320 -100 mbar 7 mbar 0.8 bar 1 + 13

SCH-DGM 325-513 40 - 250 mbar 10 mbar 0.8 bar 1 + 13SCH-DGM 06-513 100 - 600 mbar 25 mbar 2 bar 1 + 14SCH-DGM 1-513 0.2 -1.6 bar 40 mbar 3 bar 1 + 14SCH-DGM 506-513 15 - 60 mbar 10 mbar 5 bar 1 + 12SCH-DGM 516-513 40 -160 mbar 12 mbar 5 bar 1 + 12SCH-DGM 525-513 100 - 250 mbar 20 mbar 5 bar 1 + 12

Cu + MsCu + MsCu + MsCu + MsCu + Ms1.41041.41041.4104

EEx-i version (intrinsically safe) · Degree of protection EEx-ia, Klammeranschluss

For further pressure ranges see type series DWR

For further pressure ranges see type series DWR

Technical DataPressure connectionExternal thread G1/2 A according to DIN ISO 228 Part 1 (permissible only with flatgasket) and internal thread G1/4 acc. to ISO 228 Part 1 (permissible up to 4 bar).

Switching deviceSea water resistant aluminium die casting GD AI Si 12.

ProtectionIP54, for vertical installation position

Materials of the pressure probeSee summary of types

Ambient temperature-25 to +60°CAt ambient temperatures below 0°C, ensurethat no water condensation can rise in thesensor and in the switching device.

Max. permissible operating pressureSee summary of types

InstallationEither directly on the pipeline or with 2 screws 4 mm dia. on the wall surface.

Installation positionVertical upwards or horizontal.

AdjustmentContinuously adjustable by means of screw-driver on the adjusting spindle.The set switching difference is visible in thescale window.


Switching differences Largely independent of the set switchingpressure. Not adjustable. For values see summary of types.

AdjustmentScale value corresponds to the upper switching point, the lower switchingpoint is lower by the switching difference.

Switching capacity

250 V~ 250 V- 250 V-



SCH-HCD

Technical DataPressure connectionPressure connection for overpressure: G1/4 internal thread.For vacuum and differential pressure: G1/8 internal thread.

Switch caseAluminium die castMedium berührte Teile:Verzinktes Stahlblech, Perbunan

Temperature of medium-15 up to +60°C

Max. admissible working pressureSee summary of types

Installation positionHorizontal with connecting piece pointing downwards

ProtectionIP44 according to DIN 40050

MountingEither direct on pipe or with mounting bracket(is supplied as standard) onto a vertical surface.

Adjustment of the switching pointRemove cover and turn the setpoint spindlemarket with ± into the relevant position.The scale indicates only standard values, forexact adjustment of the required value a manometer is necessary which can beconnected at the measuring connection(pressure tapping piece 9 mm Ø)

Electrical data

Switching functionSingle pole switching over


3= com = common connection

2= no = normally open

1= nc = normally closed

Connection direct at the inner microswitch.The grounding terminal is accessible afterremoval of the case over.

Switching capacity10 A/220 V (resistive load)2.5 A/220 V (inductive load)

Cable entryPg 13.5

Pressure switches and Differentialpressure switchesFor neutral gases (DVGW-tested)

The pressure switches of series HCD are suitable for neutral and non-aggressive gases. Theycan be used for monitoring overpressure, vacuum as well as differential pressure. For detec-ting overpressure, connection is made on the pressure side at the lower connecting pieceG1/4 for detecting the vacuum pressure at the upper connecting piece G1/8 (remove lockingclamp). For detecting the differential pressure, the high pressure is applied at the lowerconnecting piece (G1/4´) and the low pressure at the upper connecting piece ( G1/8).

For exact adjustment of the required value a pressure tapping (9 mm Ø) is available. The pressure switch is tested to DIN 3398 part 1 approved by DVGW for air and fuel gases toDVGW-standards G 260.

The switching differential is not adjustable.The low switching differentials are valid for the lower range of adjustment, the higher valuesfor the upper ranges.


Positive pressureconnection with 1/4 ISO R 7 internal thread PG 13.5

for cable entry

Mounting holes for bracket

Cover screw

Pressure adjusting screw

high pressure inlet

Venting or differentialpressure connection1/8 ISO R7internal thread

Dimensional drawing

01/0

202

/Ko

/10

SCH-HDC 60100.2- 3 mbar 100 mbar 94.01c050SCH-HDC 60031-10 mbar 100 mbar 94.01c050

SCH-HDC 6050 5-50 mbar 200 mbar 94.01c050SCH-HDC 6150 15-150 mbar 300 mbar 94.01c050

Range of adjustment

Switchingdiff. (mbar)

DVGWRe.-No.

Model

in lowerrange

in upperrange

Max. workingpressure

0.51310

0.30.31.54

----

SCH-DPS

Technical DataPressure connectionPlastic connection piece with 6 mm externaldiameter for measuring hose with 5 mm internal diameter Connection piece P1 for higher pressure, P2 for lower pressure.

Pressure mediumAir, as well as non combustible andnon-aggressive gases

Switch housingSwitch housing and pressure connection P2made from PA 6.6Lower part and pressure connection P1 made of POM.

Medium and ambient temperature- 20°C to + 85°C(storage temperature - 40°C to + 85°C)

Max. permissible operating pressure5000 Pa for all types

Installation positionVertical pressure connections below. (In horizontal installation position with the cover facing upwards, the scale values are 20 Pa below the actual values, in horizontal installation position with the cover facing downwards, the scale values are 20 Pa higher. Vertical installation is essential for setvalues below approx. 50 Pa!)

ProtectionIP 54

InstallationBy means of mounting pieces integrated in the housing with 2 screws directly onto a vertical surface, e.g. the air-conditioner or theair duct. In the case of installation in the ceilingarea, use L brackets if necessary.

Switching point adjustmentRemove the cover and set the scale to thewanted value. The set values refer to theupper switching point (for maximum pressuremonitoring). In the case of minimum pressuremonitoring, the switching point is less than theset value by an amount corresponding to the switching differential.

Weight: 160 g

Switching functionSingle pole switching over


Differential pressure switches forventilation and air-conditioning

ApplicationsDifferential pressure switch for filter, fan or air flow monitoring in air-conditioning and ventilation systems.

Accessories supplied with the device:2 m silicone hose, 2 connection pieces with mounting screws2 self-tapping screws for mounting the housing3 screw terminals for the electrical connection

Optional accessoryDPSL L bracket for installation turned by 90°, e.g. in the ceiling area.

Dimensionaldrawing

Quotation text:

Differential pressure switch for filter, fan and/or air steam monitoring with adjustable scale.Switching capacity 1.5 (0.4) A at 250 VAC.

With approvals according to VDE 0630 for 1.5 A and EN 1854.

Max. operating pressure: 5000 Pa; type of protection IP 54. Pressure and cable connectionscan be offset in different directions; including pressure connection accessories, consisting of2 pressure connecting pieces, 2 m silicone hose, 3 screw terminals for the electrical connec-tion and mounting screws.


Type overview

01/0

202

/Ko

/10

Use flat connector 6.3 x 0.8 DIN 46 244 orthe screw terminals supplied.

Switching capacity1.5 (0.4) A / 250 VAC

Cable entry Pg 11

Approvals Switches tested and approved according to VDE 0630 for 1.5 A.

SCH-DPS 100020 Pa - 400 PaSCH-DPS 400

200 Pa -1000 PaSCH-DPS 2500 500 Pa - 2500 Pa

Setting range for upper switching

pressure

Model

20 Pa20 Pa20 Pa

Switching differential(standard values)

Dimensional Drawings

1 Normalausführung Steckeranschluss

3 -Ausführung

2 Klemmanschluss


01/0

202

/Ko

/10

Dimensional DrawingsPressure Sensors


01/0

202

/Ko

/10

Documents

Mechanical Pressure Switches - PVD · Mechanical Pressure Switches for overpressure, vacuum pressure and differential pressure KOBOLD Messring GmbH Nordring 22-24 D-65719 Hofheim/Ts