S (A) Series

The valves have a long body with the float near the bottom. The liquid waste containing solid remains low and away from working parts, venting the pipeline when filling, and permitting air to re-enter to relieve a vacuum. This is a higher capacity variant of the SL (A) Series

S (A) Series Overview
Nominal Inside Diameter 2″-10″ 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)
Seat: Buna-N Rubber
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!