Precision 3-Speed Control: Provides versatile 1050/900/700 RPM settings to match specific system requirements

ensuring compliance with large commercial boiler and heater specifications

Maintaining line pressure integrity is critical in commercial and industrial plumbing

Precision Seating: Silicone-coated EPDM rubber disc ensures a tight seal and prevents "simmering" near set pressure

Durable Capillary Design: A 60-inch (5-foot) capillary tube offers flexibility for proper bulb mounting and insulation

Johnson Controls STT18A-601R Repair Kit 30067439-890 Precision 3-Speed Control: Provides versatileThe Johnson Controls STT18A 601R Seat Repair Kit is a critical maintenance component designed for the STT series temperature actuators and control valves. This OEM valve rebuild kit provides the necessary internals to restore factory spec seating and prevent bypass leakage in commercial HVAC hydronic systems. By replacing the valve seat assembly, technicians can maintain precise flow modulation without the cost of a full valve body replacement. This