Honeywell 312867H Linkage Assembly Els PW 17895 provided the line sizing is

provided the line sizing is correct

The set point is adjusted by turning the dial to the desired "open" temperature

Since it is normally closed

High-Strength Casting: High-grade cast iron construction provides a rugged service life in demanding pump and fan applications

making it compatible with a wide range of aquastats and universal hydronic controls from major manufacturers

Honeywell 312867H Linkage Assembly Els PW 17895 provided the line sizing isThe Honeywell 312867H Linkage Assembly is a critical mechanical interface designed for externally mounted configurations, specifically engineered for seamless integration with the MP909B series pneumatic actuators. This assembly, which is functionally identical to the 312867H U model, provides the necessary damper linkage precision required for modulating control applications in commercial HVAC systems. Technicians should note that this actuator