PL & P Series

Pressure Air Valves are used for the venting of accumulating air while the system is pressurized. Small amounts of air is exhausted during the entire pumping cycle. Sized by Pressure Range.

PL & P Series Overview
Nominal Inside Diameter 1″-4″ Sizes Available
Construction Materials Body: Cast Iron (ASTM A126 Class B)
Trim/Float: Stainless Steel (ASTM A240)
Bolts/Nuts: Bolt: Steel (ASTM A307) Nut: Steel (ASTM A563)
2 1/2″ – 4″ Nut: Steel (ASTM A307)
Seat: PVC (ASTM 1784)
Paint: Tnemec 141
Pressure Ratings 20-150 psi (stand.)
2-40 psi (Low)
151-300 psi (High)


Crispin Valve offers a wide variety of special materials for air valves that may not be listed. If your project may need such materials please feel free to contact our Sales/ Customer Service team for any inquiries you may have!