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System Compatibility: Designed specifically for non-relay pneumatic circuits utilizing a restricted branch line
maintaining the same 120V CCW performance and Type A shaft dimensions
This metal-to-metal seal design minimizes thermal drift
leak-proof seal against the valve seat at differential pressures up to 15 psi
Weil McLain 381-800-477 Vent Damper 319847-401 System Compatibility: Designed specifically forWhen you are servicing gas fired systems, the Weil McLain 381 800 477 7 inch vent damper is the critical OEM component required to maintain proper draft and combustion efficiency. This automatic vent damper is the verified direct replacement for the legacy Weil McLain 510 512 347 model. Engineered specifically for boiler venting systems, this unit facilitates fuel savings by closing the flue during the off cycle to prevent standby heat loss, while
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