The highly adaptable type 1900 safety relief valve meets numerous application requirements.The type 1900-UM valve is capable of flowing liquid, gas or steam with no adjustment required to switch between different media with the same set pressure. Specifications : • Inlet Sizes: 1″ through 12″ • Inlet Ratings: ANSI Class 150 through 2500 • Outlet Sizes: 2″ through 16″ • Outlet Ratings: ANSI Class 150 and 300 • Orifice Sizes: D through W • Set Pressure Range: 4 psig to 6250 psig • Temperature Range: -450°F to 1500°F • Materials: Cast carbon steel body with stainless steel trim • Certification: ASME Section III and VIII, PED and SQL Download Data Sheet