Pressure Switch Type PS - PSU

PRESSURE SWITCH TYPE PS / PSU

FUNCTION :

Indfos pressure switch type PS/PSU is a triple pole device, meant to regulate pressure in small air compressors and water pressurization plants.
These switches cut off a 3-phase power supply when the pressure rises to a preset value and cuts in the power supply when the pressure falls to another predetermined value. Both cut off and cut in pressures are independently adjustable. All models are provided with a manual cut off switch (except PSU15X). Type PSU switch is additionally provided with a relief valve, which ensures load free starting of the compressor.

APPLICATION :

Small air compressors
Domestic Water Pressursation  System

SPECIFICATIONS :

Enclosure:

Sheet Steel housing

Enclosure Protection:

IP : 44

Cover:

Plastic

Diaphragm:

Fabric reinforced nitrile rubber

Mounting:

Through process connection

Max Process Temp.:

100°C

Max Ambient Temp.:

70°C

Process Connection:

½" BSP( F)

Relief valve Connection:

¼" Flare

Switch Type:

TPST Switch

ORDERING TABLE :

Type

Code No.

Cut-Out Pressure Range (atmg)

Min. Diff. (atm)

Max Diff.
(atm)

Pressure Relief Valve

Manual Switch

Electrical Data

PS-4B

31E0171

1-4

0.6-0.7

3

X

Present

Triple Pole Single Throw (TPST) switch for 3 phase supply. Circuit breaks on increase of pressure.

Contact Rating:
Ie = 9A(AC3), Ue = 500V,
Ie = 6A,
Ue = 220 VDC

PS-9B

31E0175

2.5-9.5

1.2-1.8

7

X

Present

PS-15B

31E0179

7-15

1.7-2.3

7

X

Present

PSU-9B

31E0176

2.5-9.5

1.2-1.8

7

Present

Present

PSU-15B

31E0180

7-15

1.7-2.3

7

Present

Present