Mueller B34237 Check Valve 321894-709 Always verify the rotation by

Always verify the rotation by looking at the hub side or checking the directional arrow stamped on the original housing to ensure proper furnace blower wheel performance

it typically includes a manual crank to allow for field testing and damper positioning during commissioning while power is disconnected

Operating at 1600 RPM

resulting in poor lubrication at startup

Mueller B34237 Check Valve 321894-709 Always verify the rotation byThe Mueller B34237 is a heavy duty 1 3 8 ODS 4 bolt check valve designed for demanding commercial refrigeration and HVACR applications. Engineered with a forged brass body, this Streamline series valve provides superior structural integrity and reliability under high pressure conditions, featuring a Maximum Abnormal Pressure (MAP) of 700 psig. The 4 bolt design is a preferred choice for contractors because it allows for easy removal and reassembly of