Simple Mounting: Compact footprint facilitates quick panel mount pneumatic switch installation for contractors in the field

SPNO Configuration: Single Pole Normally Open contacts ensure reliable circuit completion upon activation

The logic circuit provides precise 120V blower motor timing and 24V gas valve regulation

The overall foil shield with a dedicated drain wire provides critical protection against electromagnetic interference (EMI) and radio frequency interference (RFI)

Weil McLain 381-800-477 Vent Damper 319852-301 Simple Mounting: Compact footprint facilitatesWhen 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