The Thermostatic Bimetallic Steam Trap BK45 is used for low capacity applications such as drip and tracing, and economically combines steam trap, check valve and Y-Strainer (with optional blow off valve) in a small profile with a convenient 2-bolt cover for easy maintenance. Features and Benefits. 1.Forged steel body and cover. 2.Pressure assisted fail-open design. 3.Factory-preset bimetallic regulator with integral staged nozzle. No adjustment required. 4.Discharges hot condensate in a modulating fashion at approximately 18°F (10°C) below saturation temperature throughout its operating range. One internal regulator for all pressure ranges. 5.Unaffected by water hammer or superheat-solid stainless steel internals. 6.Self draining - will not freeze when installed in gravity drainage position. 7.Automatically vents air and non-condensable gases and has a high (6:1) cold water capacity for rapid start-up. 8.Operates with zero steam loss throughout its operating range saving steam and money during the life of the trap. 9.Easy in-line inspection and maintenance - mechanical stops prevent crushing of the gasket for extended gasket life. 10.Can be installed in any position. 11.Internal stainless steel Y-strainer, with optional blowoff valve. 12.Integral check valve design. Materials Body and Cover - ASTM A105 (DIN 1.0460) Cover Bolts - ASTM A193 B7 (DIN 1.7258) Bimetallic Regulator - Stainless Steels Other Internals:Stainless Steel. Available End Connections Flanges: ANSI 150RF and 300RF (DIN, PN 40) Screwed sockets: NPT, BSP Socket-weld, Butt weld