Air Lock is used when it is required to automatically hold the air pressure in diaphragm chamber of the actuator, on the same level in an event of failure of air supply.

When supply pressure drops below a preset value, the Air Lock Relay locks the air pressure in the diaphragm chamber of the actuator thereby holding the inner valve in one position, till the air supply is resumed.


Connections 1 /4” NPT (F)
Max. Supply Pressure 7 Kg/cm2
Spring Setting (standard) 1.5 Kg/cm2
MOC Aluminum LM6 or Stainless steel


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Valve Solutions Ltd, Unit 10,
Acorn Business Park, Baildon
Shipley BD17 7SW