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Series N30 Pressure Relief Valves for Wells are used to protect against excessive pressures in well systems. It is not diaphragm actuated and is used for pressure-relief service only. Series N30 consists of a bronze body construction with NPT threaded male inlet and NPT threaded female (drain) outlet connections, and stainless steel spring. Pressure Range: 5 to 25psi (34.5 to 172.4 kPa). Model N30L has a test lever and a pressure range of 30 to 60psi (206.7 to 413.4 kPa) and a standard pressure setting of 30 to 45psi (206.7 to 310 kPa).