4-inch octagon

preventing pilot dropouts and burner instability

Robust SPST Logic: Simplified single pole single throw operation provides a reliable "normally open" or "normally closed" circuit path for the ignition controller

the open air over (OAO) enclosure utilizes the airstream for thermal management

Pneumatic Operation: Operates entirely on system pressure

Johnson Controls MP823D001A Valve Actuator 30067439-890 4-inch octagonThe Johnson Controls MP823D001A is a robust, 25 square inch pneumatic valve actuator designed for precise proportional control in commercial HVAC systems. This spring return stem up unit is engineered for medium to large valves, featuring a 3 4 inch stroke and a 4 8 PSI spring range for reliable fail safe operation. Utilizing a 1 4 inch OD barbed fitting air connection, this proportional control actuator handles up to 25 PSI maximum control pressure,