PRODUCTS

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.

Type PS/PSU pressure switches find applications in :

>>    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
 
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
 PS-15B
31E0179
     7-15
1.7-2.3
7
X
 PSU-9B
31E0176
     2.5-9.5
1.2-1.8
7
 PSU-15B
31E0180
     7-15
1.7-2.3
7
 PSU-15X
31E0181
     7-15
1.7-2.3
7
X
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