Armstrong Fluid Technology 426401-002 Gasket 323055-751 this SmartX series spring return

this SmartX series spring return actuator is engineered for both round and square damper shafts

The Zonefirst AOBD-12X10 is a heavy-duty automatic opposed blade damper designed for precision airflow management within forced air zoning systems

When upgrading or replacing a boiler safety valve

This power-close/spring-return actuator ensures reliable HVAC zone control

Durable Construction: Features a 30-inch capillary tube and robust 3/8-inch sweat connections for leak-resistant installation

Armstrong Fluid Technology 426401-002 Gasket 323055-751 this SmartX series spring returnThe Armstrong Fluid Technology 426401 002 Gasket is a precision engineered casing gasket designed specifically for a wide range of commercial pump series, including the Armstrong 4030, 4280, 4300, and 4380. Manufactured from high grade nitrile (Buna N), this 6 inch component provides an airtight, leakproof seal that is essential for maintaining hydraulic integrity and system efficiency. This replacement pump gasket features an outer diameter (OD) of 7