The SV-450 valve is specifically designed for use with a boiler water level gauge glass. This valve is supplied as a valve set including one top valve, and one bottom valve. Each valve has 3 connection ports available in a wide range of sizes and types, (vessel x gauge x vent/drain). The angled flow path facilitates compact installation of the gauge glass, bringing the assembly connection point to the side. The offset body pattern allows a direct path around the stem to clean through the vent/drain ports. The standard vent/drain ports are 1/2″ F.NPT, 3/4″ F.NPT and SW are also available. The vessel connection features a floating union tail piece to allow vertical fit up mounting. If eliminating the vessel union is desired, a non-union solid shank connection is available in 3/4″ IPS pipe stub, or flanged. Ball checks are omitted in standard form, and available as an option. Ball checks are neither required nor prohibited by ASME Section I.
For non-standard material available, please consult factory.