KMC Controls VTD-9424 Diaphragm

The KMC Controls VTD-9424 is a professional-grade 4-inch pneumatic replacement diaphragm designed for high-precision HVAC actuator maintenance. Engineered specifically for use with KMC MCP-8031 series actuators and similar pneumatic valve controllers, this neoprene diaphragm ensures consistent pressure response across a standard 0 to 20 psi operating range. With an effective area of 8 square inches and a 1-11/16" stroke, the VTD-9424 provides the mechanical force necessary to modulate VAV terminals, dampers, and air handling units. Its robust construction is rated for temperatures ranging from -20?? to 180??F, making it a reliable choice for ceiling plenum installations where environmental stability is critical. For technicians performing field service, this 4" replacement diaphragm restores OEM-spec performance to aging actuators, preventing air leaks and ensuring accurate damper control in demanding commercial automation systems.

• Precision Control: Maintains exact calibration for MCP-8031 actuators, ensuring accurate stroke and torque delivery.
• Industrial Durability: High-grade neoprene material resists fatigue and environmental degradation in plenum environments.
• Broad Compatibility: Standardized 4-inch fitment facilitates direct replacement in KMC pneumatic systems without modifications.
• Thermal Stability: Reliable operation in extreme temperatures, supporting both heating and cooling cycle demands.

• Which actuators are compatible with the VTD-9424? This diaphragm is specifically sized for 4-inch pneumatic actuators, most notably the KMC MCP-8031 series used in VAV and damper control.
• What is the maximum pressure rating for this part? While it operates within a standard 0-20 psi range, the diaphragm and housing assembly can typically withstand a maximum surge of 30 psi.
• How do I know if the diaphragm needs replacement? Look for signs of leakage at the actuator housing, failure to reach full stroke, or visible cracking/stiffening of the neoprene material during inspection.

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.