PS & PSU Pressure Switch
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Type PS and PSU are pressure-controlled three-pole switches. The position of the contacts
depends on the pressure in the inlet connection and the range setting.
Pressure switch type PS is for the automatic stop and start of motors in compressed air
and water pressure plant (pressure storage tanks.)
Type PSU is especially for compressed air plant where pressure over the compressor
piston must be relieved before starting.
* Connection 1/2 BSP
* Enclosure IP55
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OrderCode
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Type.
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Set.Range (Bar)
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Min.Diff (Bar)
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Max.Diff (Bar)
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Max Test Press(Bar)
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Relief Valve
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031E0171
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PS4B
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1 > 4
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0.6 >0.7
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3
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8
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No
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031E0172
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PSU4B
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1 > 4
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0.6 >0.7
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3
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8
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Yes
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031E0182
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PS 7B
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1 > 7
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0.75>1.3
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3
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12
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No
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031E0175
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PS9B
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2.5 > 9.5
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1.2 >1.8
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7
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20
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No
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031E0176
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PSU9B
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2.5 > 9.5
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1.2 >1.8
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7
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20
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Yes
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031E0179
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PS15B
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7 > 15
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1.7 >2.3
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7
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20
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No
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031E0180
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PSU15B
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7 > 15
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1.7 >2.3
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7
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20
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Yes
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031E0191
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PSU20
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7 > 20
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2 >3
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11
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25
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Yes
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*** The latest equivalent by Danfoss of the PS and PSU is the
CS pressure switch
, please note the ranges are not the same so below we have offered an alternative nearest to the old settings, please click on the link to see the new ranges. Also please note for the PSU equivalents do not come with Relief valves, these have to be ordered separately.***
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