Johnson Controls DPM18A-600R Diaphragm Kit

Maintain the integrity of your pneumatic control systems with the Johnson Controls DPM18A-600R Diaphragm Kit. Engineered as a direct OEM replacement, this kit is vital for technicians performing field service on Johnson Controls D-3153 pneumatic actuators. When an actuator exhibits leaking seals or sluggish response, replacing the internal rubber diaphragm restores the precise linear stroke required for accurate damper positioning. This kit is specifically designed for high-performance environments, featuring a temperature rating of -40°F to 200°F to ensure HVAC pneumatic system stability in mechanical rooms or rooftop units. By utilizing this actuator repair kit, you can avoid full component replacement and ensure proportional volume control or 2-position actuation remains within specified equilibrium. The high-flexibility membrane handles standard 0-20 psig control air pressure and is rated for safety damper functions up to 30 psig, providing the structural resilience needed for pneumatic damper control.

• OEM Compatibility: Precision-fit for Johnson Controls D-3153 series pneumatic piston actuators.
• Environmental Resilience: Heavy-duty rubber construction maintains flexibility from -40°F to 200°F (-40°C to 93°C).
• Pressure Handling: Supports standard HVAC operation up to 20 psig and safety override pressures up to 30 psig.
• Cost-Effective Maintenance: Resolves air leaks and restores actuator torque without the expense of a new cylinder assembly.
• Complete Seal Restoration: Includes the primary diaphragm and necessary internal components for a comprehensive rebuild.

How do I know if the DPM18A-600R is the correct kit for my actuator?
This kit is the standard replacement for the D-3153 series. Check the actuator housing for the model number; if you have a D-3153-1 through D-3153-18, this diaphragm replacement is the specified service part.

Can this kit be used for smoke or fire dampers?
Yes, the D-3153 actuators this kit services are UL component recognized for use on 555/555S smoke and combination fire/smoke dampers, provided the degradation temperature does not exceed 250°F.

What are the signs that the diaphragm needs to be replaced?
Technicians should look for audible air hissing (leaks), failure of the piston to reach full stroke at 20 psig, or erratic "hunting" when receiving a signal from a pneumatic controller.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.