This sensor provides continuous feedback on the damper's exact position to the building management system

Drop-in Replacement: Directly replaces obsolete part numbers 1171826 and 1172574 without modification

2-inch outside diameter and 43

Persistent trips typically indicate restricted airflow

It is typically mounted on the barometric draft control or the draft hood

Johnson Controls D-251-6003 Diaphragm 30067439-890 This sensor provides continuous feedbackThe Johnson Controls D 251 6003 is a high performance replacement diaphragm specifically engineered for pneumatic actuator maintenance and repair. As a genuine Number 4 actuator part, this single piece diaphragm ensures a positive seal and consistent pressure response in critical HVAC and industrial machinery control systems. Designed for field service by veteran technicians, the D 251 6003 provides the necessary flexibility to regulate fluid or gas