Lock-up Air Relay

Lock-up Air Relay is used for fail in place applications of control valves when air supply drops below acceptable pressure levels.

The Type 250 Lock-up Air Relay is a reliable unit for fail in place applications of control valves when air supply drops below acceptable pressure levels. Valve or damper position is maintained by capturing air pressure inside the diaphragm chamber (or piston cylinder) of the actuator, when the supply pressure falls below the desired set value.

 

 

Specifications

Port Size (Inlet, Outlet, Supply) 1/4″ NPT
Cut-off Pressure Range 15-60 psig (1-4 BAR)
30-120 psig (2-8 BAR)
Supply Pressure 125 psig (8.35 BAR) maximum
Temperature Limits 0° to 160°F (-18° to 71°C)
Weight Aluminum: 2.1 lbs (0.95 kg)
Stainless Steel: 4 lbs (1.8 kg)
Materials Housing: Diaphragm:
Spring:
Plug:
Trim:
Aluminum or 304
Nitrile/Nylon
Plated Steel
Stainless Steel/Nitrile
Stainless Steel

 

Applications

Reliability for fail in place applications of control valves when air supply drops below acceptable pressure levels.