Velan Q250 Series 1/2" NPT bimetallic thermostatic steam trap for low capacity applications in a non-repairable welded small profile. Series Q250 traps will not plug due to copper and iron oxides in the system. Condensate flashes on the discharge side of the orifice. The trap discharges hot condensate in a modulating fashion at approximately 18°F below saturation temperature throughout the operating range. Q250 traps are unaffected by water hammer or superheat and are self draining - they will not freeze when installed in gravity draining position. They automatically vent air and non-condensable gases and have a high (7:1) cold water capacity for rapid start-up. This valve operates with zero steam loss throughout its operating range and can be installed in any position.