Thermostatic Steam Trap Manufacturer in USA operate in response to the surrounding steam temperature basically The thermostatic element in a radiator trap responds to temperature to open or close. Description: Available materials: Cast Iron, Ductile Iron, Cast Steel (A216 WCB, WCC, LCB, LCC, WC6, WC9), Stainless Steel (SS316, SS304, SS316L, SS904L, CF8, CF8M, F304, F316), A105. Size: 1/2″ to 4″ Nominal Pressure: PN10 to PN250 Class: 150 to 1500 Ends: Flanged, Buttweld, Socketweld, Threaded