KMC Controls HPO-0038 Diaphragm

The KMC Controls HPO-0038 Diaphragm is a precise OEM replacement part engineered for the MCP-3631 series rotary pneumatic damper actuators. Built from high-grade elastomer, this replacement diaphragm is designed to withstand continuous cycling in VAV terminal units and diverse HVAC zoning systems. In pneumatic control loops, maintaining the integrity of the 8 sq. in. effective area is critical for converting 0 to 20 psig supply pressure into the necessary torque for accurate 100?? rotation. A compromised diaphragm leads to air leaks, sluggish response, or complete pneumatic actuator failure. This component ensures the seal remains airtight, preserving the linear relationship between the control signal and the drive hub movement. Technicians should verify that the internal actuator housing is free of oil and moisture before installation to prevent premature degradation. This part is compatible with various rotary damper actuator configurations, including both round and square shaft models within the MCP-3631 family.

• Ensures airtight sealing for consistent pressure-to-rotation conversion.
• Restores original torque performance for MCP-3631 series units.
• Constructed from heavy-duty elastomer to resist industrial wear and fatigue.
• Direct-fit replacement diaphragm reduces field labor and troubleshooting time.
• Critical for maintaining energy efficiency in HVAC pneumatic systems.

Is the HPO-0038 compatible with all MCP-3631 models?
Yes, this diaphragm is designed to fit the entire MCP-3631 series, including the 3000, 5000, and 8000 sub-models used on different shaft sizes.

What are the signs that a KMC pneumonia diaphragm needs replacement?
Look for "hunting" behavior where the actuator fails to hold position, audible air leaks from the housing, or a complete lack of response to control pressure signals.

Can I use this for actuators from other manufacturers?
No, this part is precision-molded specifically for KMC Controls pneumatic hardware to ensure proper fitment and travel limits.

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.