Johnson Controls STT17A-617R Repair Kit Freon the 550001625 is specifically designed

the 550001625 is specifically designed for Argo AT Series 4-element boilers

flex tubing

Does this part include the set screw for the 1/2-inch shaft

For a secure

Optimized Efficiency: 1/30 HP PSC design draws minimal amperage while maintaining high torque for damper and valve actuation

Johnson Controls STT17A-617R Repair Kit Freon the 550001625 is specifically designedThe Johnson Controls STT17A 617R Seat Repair Kit is a critical maintenance component designed for the T 4000 series pneumatic thermostats and specific HVAC control valve assemblies. Engineered for precise pneumatic calibration, this kit addresses common failure points such as seat leakage and inconsistent air pressure regulation. Utilizing high grade elastomers and precision machined internal components, the STT17A 617R ensures optimal pneumatic