Johnson Controls MP8000-6325 Diaphragm & Seal Kit

The Johnson Controls MP8000-6325 Diaphragm & Seal Kit is the essential service set for maintaining MP82 and MP83 Series Pneumatic Actuators. This kit is engineered to restore factory-spec pressure control and stroke accuracy in systems managing chilled water, hot water, and steam. Periodic replacement of the EPDM synthetic rubber diaphragm prevents air leakage and ensures a constant 25 sq. in. effective area throughout the actuator's travel. The inclusion of high-grade Nitrile U-cup stem seals provides a reliable airtight barrier, protecting the internal assembly from ambient contaminants and operational wear. For technicians servicing pneumatic valve actuators, this OEM kit is critical for field-reversible units to ensure the spring-return mechanism operates within the calibrated 25 psig maximum control pressure range. Utilizing genuine Johnson Controls parts maintains the integrity of the corrosion-resistant housing and the precision of the stainless steel stem components, avoiding the risks associated with third-party elastomers.

Key Benefits:

• Broad Compatibility: Specifically designed for the 25 sq. in. MP82 and MP83 actuators.
• Durable Elastomers: Features EPDM diaphragms and Nitrile seals for high chemical and thermal resistance.
• Performance Restoration: Ensures accurate positioning of hot water and steam control valves.
• OEM Fitment: Includes the essential plastic sleeve, seal, and 25 square inch diaphragm for a complete rebuild.

Common Questions:

• How do I identify if my actuator needs an MP8000-6325 kit? This kit is specifically for Size 150 actuators (MP82/MP83) with a 25 sq. in. effective area. If you have an MP84 or larger, you will require the MP8000-6350.
• What tools are required for the diaphragm replacement? Service typically requires a 7/16-inch hex tool, stem wrench, and a strap wrench. The MP8000-6012 tool kit is recommended for professional installation.
• Can this kit be used for both direct-acting and reverse-acting units? Yes, the MP8000-6325 is compatible with the reversible in-situ design of the MP8000 series.

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.