Neptune Products

Delivering accurate, precise and quality solutions

Neptune's technical innovations, backed by solid customer support, builds confidence in our complete portfolio of products, delivering peace of mind reliability to our end users.

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Neptune Markets

Single-source, end-to-end solutions

Neptune delivers pump systems for use in the reliable and safe handling of chemical fluids used for water treatment applications in municipalities, general industries and agriculture.

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ProTips Education Center

Single-Source Resource for Industrial Water Treatment

New educational center dedicated to providing you with resources, best practices and product information for the industrial water treatment market.

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Relief Valves

Neptune's Relief Valves protect the piping and system from overpressure. If released, the relief valve discharge is piped to a tank in order to prevent any system or piping damage. Neptune's exclusive relief valve design utilizes a unique spring guide which assures proper spring loading and consistent relief capacity. The relief pressure setting can easily be changed by removing the top cap screw and locking set screw, inserting a proper allen wrench into the opening and adjusting the sprint to the desired pressure. Additionally, Neptune's relief valves use a self-cleaning ball check and seat.

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Features and Benefits

  • All wetted parts are 316SS or C-20
  • Pressures from 30 to 2,000 psi (2.1 to 137.9 bar)
  • Spring guide for consistent relief capacity
  • Easily adjustable relief setting
  • Liquid service only