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By-Pass Control Relief Valves

Series BP30 By-Pass Control Relief Valves are used in commercial, residential and industrial applications to regulate liquid pressure as supplied by a positive pressure pump. These diaphragm-operated type valves protect equipment by opening at the desired setting to allow excess volume to be by-passed back to the source. Series BP30 consists of a bronze body construction with NPT threaded male inlet and NPT threaded female outlet, sensitive rubber diaphragm, Teflon disc, spring and adjustment handle, and a tee handle. Models available in various pressure ranges.


  • Spring and adjustment handle are free from contact with the liquids being controlled
  • Easy-to-operate tee handle facilitates pressure change
  • By-pass control relief valve protects equipment by allowing excess volume to be by-passed back to the source
  • Rugged bronze body with sensitive rubber diaphragm

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific BP30

Approval Information

For approval information, please refer to the products specification sheet. For any other information on product certification and documentation information, please visit our certification partner websites: