Series Figure 41 Steam Safety Relief Valves are ASME Section VIII valves used for over-pressure protection of unfired pressure vessels, steam pressure reducing valve stations, and other steam service equipment with operating pressures from 5 to 250psi (.34 to 17.2 bar). They are high capacity safety relief valves with a top guide and full nozzle. They have a bronze body (sizes 1/2 to 2 1/2 in.) with NPT threaded male inlet and threaded female outlet (drain) connections, or a cast iron body (sizes 1 1/2 to 6 in.) construction with flanged connections. ASME, Section VIII rated.