• All wetted parts of Pressure relief valves are 316SS or Carpenter 20

• Relief Valve Pressures from 30 to 2000 psi

• Relief valve Spring guide for consistent relief capacity

• Easily adjustable relief setting

• Liquid service only

Neptune Relief Valves have two outstanding characteristics:

Economy. Models RV-316-1, -2, -3 and -4 with all 316SS wetted parts cost no more than other 304SS designs. Carpenter 20 valves are also available as standard.

Simplicity. Neptune's exclusive design uses a self-cleaning ball check and seat. It has a unique spring guide which assures proper spring loading and consistent relief capacity. The relief pressure setting can be easily changed by removing the top cap screw and locking set screw, inserting a proper Allen wrench into the opening, and adjusting the spring to the desired pressure.

Recommended setting: Operating pressure plus 10% or 50 psi whichever is greater.