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Control Air Type 250 Lock-up Air Relay

 
 
Type 250 Lock-up Air Relay
Reliability for fail in place applications
 
The ControlAir Type 250 Lockup 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
Ordering
Part
Number
Port Size
(NPT)
Set Point Range 
Factory Set Point Range
Construction
250-AA
1/4"
15-60 psig
(1-4 BAR)
22 psig
(1.5 BAR)
Aluminum
250-BA
1/4"
30-120 psig
(2-8 BAR)
85 psig
(5.8 BAR)
Aluminum
250-AS
1/4"
15-60 psig
(1-4 BAR)
22 psig
(1.5 BAR)
Stainless
Steel
250-BS
1/4"
30-120 psig
(2-8 BAR)
85 psig
(5.8 BAR)
Stainless
Steel
 
 
 
 
 

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