The model "SW" valve is our highest capacity ASME safety valve. Unique O-ring seal insures valve is bubble-tight to within 10% of set pressure. 1" NPT and 1-1/4" NPT inlets available.
All brass construction with stainless steel springs. O-ring seal available in silicone or fluorocarbon rubber. Stamped with "UV" and "NB" symbols. Available set pressure range 25 PSI to 300 PSI. Set pressure tolerance +3% of set pressure. 250°F max. temperature.