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Air Lock Relay >> AIR LOCK RELAY (3 PORT, 5 PORT VERSION, ALR - 3, ALR - 5)
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AIR LOCK RELAY (3 PORT, 5 PORT VERSION, ALR - 3, ALR - 5)
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FEATURES : - For control valve application.
- Sensitivity 3 bar to cutoff only.
- Most suited for critical applications.
- No External bleed.
- 3 way & 4 way versions available where all ports are blocked.
- Super compact in size.
- Application most suited for air failure safe conditions complete.
CONNECTION
CASE 1 :
Air lock relay 3/2 ALR is connected between actuator & solenoid valve. On absence of pressure it locks actuator in position & unless pressure resumes it maintains position (Assumption that actuator & fittings have no leakage)
CASE - 2 :
Air lock relay 3/2 ALR-3 is connected before solenoid valve. On absence of Pressure actuator remains in position depending upon solenoid valve position. Under energized condition & on the event of air failure actuator remains actuated, on de energisation, the actuator closes.
CASE - 3 :
5/2 air lock relay ALR-5 is installed between solenoid valve, or positioner output & actuator ports. On event of air pressure failure, air lock relay maintains pressure locked condition. Positioner change does not reflect cylinder movement, but external forces can change actuator position.
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