Honeywell 312817 Actuator Cover

Maintain the structural integrity of your pneumatic systems with the Honeywell 312817 Actuator Cover. Specifically engineered as a replacement component for 5-inch MP953C Series pneumatic actuators, this high-grade plastic housing provides a precise fit to shield internal moving parts from environmental debris and mechanical impact. In industrial and commercial HVAC applications, protecting the internal diaphragm and spring assembly is essential for consistent pressure response and valve modulation. Field technicians often utilize the Honeywell 312817 to prevent dust accumulation and moisture ingress, which can lead to premature failure of the actuator's core mechanics. This cover is a direct OEM match for the MP953C1026 and compatible 5" models frequently paired with V5011 and V5013 valve bodies. Its streamlined design ensures that the diaphragm bead remains properly seated in the retention groove during high-cycle operations, allowing for reliable temperature control and airflow management across complex heating and cooling loops. Secure this Honeywell pneumatic part to ensure your actuators remain operational under demanding conditions.

• Precise 5-Inch Fit: Designed specifically for the frame of Honeywell MP953C Series 5" actuators to ensure total component coverage.
• Internal Component Protection: Shields the sensitive actuator diaphragm and feedback spring from dirt, moisture, and accidental physical damage.
• Durable Construction: Manufactured from high-impact resistant materials to withstand the rigors of mechanical rooms and industrial environments.
• Optimized Performance: Assists in maintaining the necessary seal for the pneumatic valve actuator to operate at designated pressure ranges.

• Is this cover compatible with the larger 8-inch or 13-inch MP953 models? No, the Honeywell 312817 is strictly designed for the 5-inch Series 2 models. For larger actuators, specific 8-inch or 13-inch covers must be used to ensure a proper seal.
• Does this include the replacement diaphragm or mounting screws? This part number typically identifies the actuator cover housing alone. Internal hardware or soft goods like diaphragms are generally ordered as separate repair kits.
• How do I ensure the diaphragm is seated correctly during installation? When tightening the cover, technicians should verify that the diaphragm bead is flush within its retention groove to prevent air leaks and ensure accurate stem positioning.

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.