This 3/4 x 3/4 inch high capacity safety relief valve is designed for low pressure, steam heating boilers and process equipment used in industrial and commercial applications. It features a bronze body, stainless steel spring, top guided stem, NPT threaded male inlet x threaded female outlet (drain) connection, and a non-stick PTFE® disc to metal seating ensures positive shutoff. The factory pressure setting for saturated steam service is set at 15 psi. This valve has an ASME, section IV rating.