DL Series

Deep Well Air Valves have an adjustable top which controls the velocity of air discharged from the valve. It also helps prevent chatter, and premature closure of the valve mounted on the discharge side of the pump.

DL Series Overview
Nominal Inside Diameter 0.5″- 6″ Sizes Available
Construction Materials Body: Cast Iron (ASTM A126 Class B)
*Optional Ductile Iron (ASTM A536 GR 65-45-12)
Trim/Float:  Stainless Steel (ASTM A240)
Bolts/Nuts: Bolt: Steel SAE J429 (Grade 2) Nut: Steel A563 (Grade A)
Seat: Buna-N Rubber
Paint: Tnemec 141
Pressure Ratings 20-150 psi (stand.)
2-40 psi (Low)
151-300 psi (High)

Many Crispin Valves are available with special materials that may not be listed. Please contact the factory to inquire about custom orders.