This 1/2 inch bypass control relief valve is used in commercial, residential and industrial applications to regulate liquid pressure as supplied by a positive pressure pump. It is a diaphragm-operated type valve that protects equipment by opening at an adjustable range of 45-100 psi (3.1 to 6.9 bar) to allow excess volume to be bypassed back to the source. It consists of a bronze body construction with NPT threaded male inlet and NPT threaded female outlet, sensitive rubber diaphragm, Buna-N disc, a tee handle, and spring and adjustment handle.
