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A Pressure Switch correctly installed and to the correct specification gives a switch point at a specific set pressure. This electrical circuit can be used to stop or start a machine, operate an alarm or regulate the pressure in a process. Pressure Switches are invaluable in the efficient and safe operation of plant and machinery.

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a) Before fitting the pressure switch to a pressure source ensure that the maximum pressure of the pressure switch is higher than that of the pressure to be applied.

b) Before fitting the pressure switch to a pressure source check that the wetted parts are compatible with the fluid being used, and that the pressure connection correctly matches that of the pipework.

c) Do not use piston type pressure switches on gasses

d) Do not use standard pressure switches on Oxygen or Acetylene unless approved by our Technical Department.

e) When fitting the pressure switch to the pipe work use correct sealing methods. Do not use the switch housing to tighten

the switch to the pipework, use correct spanners on the base hexagon.

f) Differential pressure switches should not be used with more than the range applied to one side, unless approved by our Technical Department. Line pressure must not exceed the line pressure stated on the pressure switch label. The higher of the two pressures

Follow these guidelines for safe use at all times

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SWITCH INSTALLATION & USE

must be connected to the port marked high and the lower of the two pressures must be connected to the port marked low.

g) Ensure that the electrical supply is isolated before removing cover. All covers are marked with warning flash.

h) Ensure before connecting the terminals of the pressure switch to the circuit that the electrical switch is of the correct rating. The rating is stated on the pressure switch label.

i) Ensure that the terminals are connected correctly and the pressure switch body is correctly earthed.

j) Ensure that the pressure switch set point is correct before use.

k) Ambient and process temperature acting on the pressure switch should be within -10ºC to +80ºC and protected from higher fluid temperatures by means of a siphon tube filled with condensate before use. The fluid in the pressure chamber should not be allowed to freeze or crystallise as this will lead to rupture of the sensing element.
 

If in doubt concerning the application of any pressure switch contact our Technical Department who will only be too pleased to give you advice.

enquiries@baileymackey.com  |  Tel +44 (0) 121 357 5351  |  Fax +44 (0) 121 357 8319  |  Baltimore Road, Birmingham, B42 1DE, UK