Honeywell 315917 Diaphragm

The Honeywell 315917 replacement diaphragm is a critical field-service component engineered for high-performance maintenance of pneumatic globe valve systems. Designed to restore precise pressure response and airtight sealing, this Honeywell actuator accessory allows technicians to rebuild existing units rather than replacing the entire valve assembly. Constructed from durable, high-flexibility materials, the 315917 diaphragm ensures linear stem travel and reliable modulation under varying pneumatic branch line pressures. This HVAC replacement part is essential for maintaining the calibrated spring ranges required for accurate terminal unit control in commercial building automation systems. By replacing a fatigued or ruptured pneumatic diaphragm, contractors can eliminate air leaks and restore the operational efficiency of the actuator’s rolling or flat-style mechanism. As a standard Honeywell 315917 service kit item, it provides a cost-effective solution for extending the service life of legacy infrastructure without compromising flow regulation accuracy.

• Full Compatibility: Specifically designed for seamless integration with VP525A/C, VP526A, VP527A, and VP531A/C valve series actuators.
• Enhanced Durability: Engineered for long-cycle life in demanding HVAC environments, resisting material fatigue from constant pressure modulation.
• Optimized Performance: Restores factory-standard pneumatic valve sensitivity and ensures accurate close-off force for steam and water applications.
• Direct Fit: Simplifies field repairs with precise dimensions for rapid installation within the actuator housing.

How do I know if my Honeywell pneumatic actuator needs a 315917 diaphragm?
If you notice the valve failing to reach its full stroke or hear an audible hiss of escaping air from the actuator head, the Honeywell 315917 is likely required to resolve the leak and restore pressure sensitivity.

Is the Honeywell 315917 compatible with MP953 series actuators?
While both utilize pneumatic diaphragms, the 315917 is specifically sized and rated for the VP525, VP526, VP527, and VP531 series. Always verify the actuator model number on the nameplate before installation.

Can I replace this diaphragm without removing the valve from the line?
Yes, in most configurations, the actuator top assembly can be serviced by removing the cover bolts, allowing for the 315917 replacement while the valve body remains piped in the system.

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.