Honeywell 311852 Spring

The Honeywell 311852 spring is a critical component for maintaining precise pressure control in commercial HVACR pneumatic systems. Engineering-grade and brown in color, this replacement spring is specifically designed for use with 8-inch MP953A and MP953C Series pneumatic actuators. It calibrated for a 2-7 PSI spring range, ensuring accurate proportional control of steam, hot water, or chilled water valves. This veteran technician-approved part is built to withstand the rigorous demands of pneumatic valve actuator maintenance, providing the necessary mechanical force to return the actuator to its normal position upon loss of pilot air pressure. The Honeywell 311852 is technically identical to the 311852/U (universal) model, offering seamless compatibility for field repairs without needing to modify existing actuator 8-inch series hardware. For contractors managing Honeywell MP953 sequence setups, this spring ensures consistent hysteresis performance and prevents valve sticking in critical HVAC pneumatic systems.

• Precision Calibration: Designed for an exact 2-7 PSI operating range to maintain tight control over valve positioning.
• Direct Compatibility: Form-fitted for Honeywell MP953A and MP953C 8-inch actuators, ensuring a perfect drop-in fit.
• Contractor Identification: The brown color coding allows for rapid identification in the field, preventing installation errors in multi-actuator banks.
• Industrial Durability: Metal construction designed to resist fatigue in high-cycle commercial HVACR pneumatic environments.

What actuators are compatible with this spring?
This spring is engineered specifically for the 8-inch diameter MP953A (direct-acting with Gradutrol relay) and MP953C (direct-acting without positioner) pneumatic actuators.

Are the 311852 and 311852/U parts interchangeable?
Yes, the 311852/U designation indicates the universal packaging of the same technical component, ensuring identical form, fit, and mechanical performance.

Why is the color coding important for this part?
In pneumatic actuator spring replacement, colors denote the specific PSI range. Brown signifies the 2-7# tension required for proper sequencing in Honeywell valve control applications.

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.