AIRLOCK RELAY

PL30S | 50S

PRODUCT DESCRIPTION

Philair air lock relay is a reliable unit for achieving stay put condition of control valves on air supply failure. The air pressure is blocked inside the diaphragm chamber of the actuator, when the supply pressure fails below the set value.

SPECIFICATION

  • Model : PL30S | 50S
  • Max Input Pressure : 7.5 kg/cm2
  • Sig Range : 2-7kg/cm2
  • Ambient Temp : -5°C-80°C
  • Port Size : 3/4" NPT/1" NPT
  • Material : Aluminium

SALIENT FEATURES

  • Compact Design
  • Quick Response
  • High Stability and Reliability
  • Longer Life
  • Easy to Install
  • Trouble Free Services
  • Economically Priced
  • Soft Seating for Bubble Tight Shut Off
PRODUCT OPERATION

The supply pressure (SIG) connected to the relay is sensed by a spring loaded diaphragm and the thrust developed enables a pilot valve to open. The output from the pilot valve acts on a piston and the trust developed by it act upon the plunger, which open the inlet valve to outlet. When malfunction in the control signal circuit occurs pressure holding above the piston downwards is lost through the exhaust, inlet valve closes with the spring return and the circuit is sealed this closed condition will continue until the signal pressure is established to the original level.

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