This 3/4" pressure safety relief valve is used in commercial and industrial applications for low pressure, steam heating boilers and process equipment. It consists of a bronze body construction with NPT threaded male inlet and threaded female outlet (drain) connection, a top-guided stem, stainless steel spring, and a non-stick Teflon (R) disc-to-metal seating. The pressure relief is set at 30 psi (2.1 bar).