Armstrong Fluid Technology 816009-211 Flange Kit 326058-755 Fail-Safe Logic: Power closed/spring return

Fail-Safe Logic: Power closed/spring return open operation ensures the zone remains open if the 24Vac signal is lost

Common Questions How do I calibrate the set point

If the dropout voltage is too high

positive seal at differential pressures up to 15 PSI

How do I determine the rotation direction

Armstrong Fluid Technology 816009-211 Flange Kit 326058-755 Fail-Safe Logic: Power closed/spring returnThe Armstrong Fluid Technology 816009 211 Flange Kit is a precision engineered 1 1 2" Cast Iron Flange Kit designed for seamless integration with Armstrong circulator pumps. Specifically engineered to facilitate secure HVAC pump flange replacement, this kit ensures a leak proof connection in hydronic heating and cooling systems. Constructed from high grade cast iron, the 816009 211 offers exceptional durability and resistance to thermal stress, making