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The MCC POWERS 3918221 is a stem plate replacement kit designed to restore proper valve stem sealing and alignment in commercial HVAC and building automation valve assemblies. This kit provides the necessary components to rebuild a worn or damaged stem plate without replacing the entire valve body, reducing downtime and material cost. It is a direct service component intended for installation by licensed HVAC technicians or qualified building controls contractors working on valve actuator assemblies.
This stem plate replacement kit is suited for commercial and light industrial HVAC applications where MCC POWERS valve assemblies are in service. Typical install scenarios include air handling unit control valves, hydronic zone valves, and chilled or hot water system control points. The kit is used during scheduled preventive maintenance or in response to stem seal failure, leakage, or actuator binding.
Designed as an OEM-style replacement stem plate kit for MCC POWERS valve assemblies used in commercial HVAC control applications.
Installation should be performed by a licensed HVAC technician or qualified controls contractor. Shut off and isolate the hydronic circuit and depressurize the valve assembly before disassembly. Refer to the MCC POWERS valve service documentation for proper stem plate seating and torque procedures. Ensure the system is fully repressurized and leak-checked after reassembly before returning the circuit to service.
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