In-Line Pressure and Vacuum Relief Vent



In-Line Pressure and Vacuum Relief Vent

Data Sheet



Certified flow curves validating flow characteristics of unit
Certified test report verifying specified settings and leakage performance
“Air-cushion” pallet design for low leakage performance of no more than 1 SCFH at 90% of the set pressure
Pallet assembly guides and center pallet stem guide to ensure proper alignment of pallet assembly on the seat and smooth lifting and reseating action
Automatic condensate drainage design to mitigate freezing, binding and clogging
Swing-bolt design facilitating inspection and easy maintenance
Serialized unit and associated weights for easy identification and traceability


Sizes: 2” (DN 50), 3” (DN 80) and 4” (DN 100)
Connections: Outlet connection has standard NPT threads. Inlet connection mates with 125# / 150# ANSI and DIN PN 16.
Materials: Aluminum, Ductile Iron and Stainless Steel
Standard Setting Range*: Pressure: 1 – 26 oz/in2 | 4.31- 112.04 mbar
Standard Setting Range*: Vacuum: 1 oz/in2 | 4.31 mbar


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