Johnson Controls MP843C001F Actuator

The Johnson Controls MP843C001F is a robust pneumatic valve actuator designed for the precise positioning of terminal units and small valves. Engineered with a 50 square inch effective diaphragm area, this unit operates across a 3-7 PSI spring range, providing reliable spring return stem up action upon loss of control pressure. The actuator features a 3/4-inch stroke and is equipped with a standard 1/4-inch OD barbed fitting for secure air connection. Built to handle a maximum control pressure of 25 PSI, the MP843C001F ensures consistent performance in demanding HVAC environments. This kit includes the necessary actuator mounting hardware, streamlining the installation process for field technicians. Whether you are performing a pneumatic actuator replacement or a new system integration, this Johnson Controls MP843 series component offers the mechanical durability required to maintain accurate flow control in commercial building automation systems.

• Precise Control: The 3-7 PSI spring range allows for fine-tuned modulation in pneumatic control loops.
• Durable Construction: Features a high-strength molded synthetic rubber diaphragm for extended cycle life.
• Easy Integration: Included mounting kit facilitates direct installation on compatible Johnson Controls valve bodies.
• Fail-Safe Operation: Spring return (stem up) configuration ensures a known state during pneumatic signal failure.

Common Questions

What is the maximum signal pressure for the MP843C001F?
The maximum control pressure for this actuator is 25 PSI. Exceeding this limit can damage the internal diaphragm.

Is this unit compatible with non-Johnson Controls valves?
While primarily designed for Johnson Controls valve assemblies, it can be adapted to other valves provided the 3/4-inch stroke and mounting footprint match the valve’s requirements.

What type of air connection is required?
The unit features a 1/4-inch OD barbed fitting, designed for standard plastic or copper pneumatic tubing used in terminal unit controllers.

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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.