Johnson Controls D-251-6002 Diaphragm 30067439-890 it triggers an automatic reset

it triggers an automatic reset once temperatures rise above the fixed differential

Robust Performance: Rated for 1A PV / 2A MV maximum loads at 60Hz

Simple Installation: Standard 7/8-inch duct cutout with an integral gasketed flange simplifies mounting on sheet metal ducts

Standard HVAC manifold gauges and electrical tools are required to verify pressure setpoints and secure wire terminations during setup

Johnson Controls D-251-6002 Diaphragm 30067439-890 it triggers an automatic resetFor field technicians maintaining legacy pneumatic systems, the Johnson Controls D 251 6002 Diaphragm is the primary replacement component for Number 2 pneumatic actuators. This replacement actuator diaphragm is engineered from a durable synthetic rubber compound, specifically designed to restore the pressure seal and stroke integrity of D 251 series damper actuators. In the field, a ruptured diaphragm leads to air bypass and failed damper