Schneider Electric (Barber Colman) N800-9424 Diaphragm

The Schneider Electric (Barber Colman) N800-9424 Diaphragm is a precision-engineered replacement component purpose-built for the 2474 Series of pneumatic actuators. This 2474 series diaphragm is technically identical to the legacy 21-842 part number, providing a drop-in solution for service technicians maintaining Barber Colman M574 actuator assemblies. As a veteran-grade HVAC replacement part, it ensures the structural integrity of the pressure chamber, allowing for accurate linear or rotary positioning in pneumatic control systems. Whether you are performing a routine overhaul or responding to a ruptured seal in an M574-1025 actuator, the N800-9424 delivers the dependable air-flow regulation required in commercial building automation environments. Its robust construction is designed to withstand the cyclic stresses of HVAC pneumatic actuator operation, maintaining consistent control signals across the full stroke of the device.

• Universal Compatibility: Serves as a direct replacement for both N800-9424 and legacy 21-842 specifications.
• Engineered for M574 Series: Specifically designed to fit and function within the Barber Colman M574 pneumatic actuator housing.
• Durable Seal Integrity: Reinforced material construction prevents air leaks, ensuring stable pressure response for terminal unit controllers.
• OEM Precision: Genuine Schneider Electric quality ensures tolerances match original equipment performance for critical damper and valve modulation.

Is the N800-9424 compatible with older 21-842 units?
Yes, the N800-9424 is the direct electronic and physical equivalent of the 21-842 diaphragm. It is 100% interchangeable in all 2474 Series applications.

Which actuator models does this diaphragm fit?
This part is the primary replacement diaphragm for the M574 series of actuators, including high-torque models like the M574-1025 commonly found in legacy pneumatic control setups.

Can I install this without specialized tools?
While installation follows standard pneumatic actuator service procedures, a technician should ensure the housing is clean and free of debris to prevent premature failure of the new actuator diaphragm.

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.