Honeywell 309807 Seat Rotation is determined by looking

Rotation is determined by looking at the air discharge side of the prop

ensuring a gastight seal at the burner assembly is non-negotiable

consistent pilot flame for reliable ignition

but they represent the same natural gas orifice

Honeywell 309807 Seat Rotation is determined by lookingThe Honeywell 309807 Seat is a critical mechanical component engineered specifically for the VP501 and VP525C Series pneumatic radiator valves. Built for the rigorous demands of two pipe steam and hot water systems, this replacement valve seat ensures a tight, reliable seal to prevent bypass leakage and maintain precise terminal equipment control. As a genuine Honeywell HVAC part, it is designed to restore original factory close off ratings and extend