Honeywell 314100 Replacement Diaphragm

The Honeywell 314100 Replacement Diaphragm is a critical service component engineered specifically for the Honeywell MP909A series of pneumatic damper actuators. As a high-performance rolling diaphragm, it enables the proportional control necessary for air handling units, terminal boxes, and mixing applications. When an actuator fails to maintain a seal or exhibits sluggish response, a diaphragm replacement often restores full pneumatic actuator performance without the need for a complete unit overhaul. Field technicians rely on the 314100 OEM part to ensure leak-free operation and precise pressure sensing in building automation systems.

This genuine Honeywell replacement part is built to withstand rigorous industrial cycles and fluctuating control pressures. By utilizing a piston-type rolling diaphragm design, the 314100 allows for a consistent 3-1/2 inch stroke, maintaining the HVAC damper control accuracy required in modern facilities. Integrating this part into your preventative maintenance schedule helps prevent unexpected system downtime and ensures that your MP909A actuator continues to provide reliable airflow modulation.

Key Benefits for Technicians:

• Exact OEM Compatibility: Specifically designed as the direct replacement diaphragm for MP909A actuators, ensuring a perfect fit and restored actuator sealing integrity.
• Cost-Effective Repair: Eliminates the expense of replacing entire aluminum-body actuators by restoring the internal pressure-sensing mechanism.
• Durable Construction: High-grade materials resist wear and chemical degradation in demanding HVAC environments, supporting long-term reliability.
• Simplified Field Service: Designed for straightforward replacement, allowing for rapid restoration of actuator function and minimal disruption to the air system.

Common Questions About the Honeywell 314100 Diaphragm:

How do I know if my MP909A needs a new diaphragm?
If the actuator is leaking control air or failing to achieve its full stroke under typical pressure ranges (such as 3-13 psi or 5-10 psi), the diaphragm likely has a tear or has lost its flexibility. Replacing it with the Honeywell 314100 restores the required seal.

Is the 314100 compatible with newer MP909D or E models?
The 314100 is the dedicated service part for the MP909A Series. While newer D and E models serve similar purposes in damper control, always verify the specific part number in the manufacturer's technical literature to ensure compatibility with your legacy steel-housing or aluminum-housing units.

What is the typical weight and size of this part?
This replacement diaphragm weighs approximately 2.0 lbs and is sized precisely to fit the internal piston assembly of the MP909A, ensuring the 2.82 sq in effective diaphragm area remains consistent with original specifications.

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.