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The Williams P500118 Limit Switch is a critical OEM high-limit safety control engineered for precision temperature regulation in Williams Comfort Products heating systems
ensuring proper venting and exhaust flow according to manufacturer specs
Does this assembly include the orifice
Ease of Integration: Standard NPT threading and a compact footprint allow for efficient HVAC part installation even in tight mechanical rooms
Engineering-grade construction ensures reliable performance in FVIR (Flammable Vapor Ignition Resistant) systems
Siemens Building Technology 656-600 Valve Actuator 321894-709 The Williams P500118 Limit SwitchThe Siemens 656 600 is a heavy duty pneumatic valve actuator replacement top designed for seamless integration with Siemens Powermite series valves. This replacement actuator with trim is engineered for 3 4" line sizes and features a normally open (NO) fail safe position, ensuring the valve remains open upon loss of control air. Built for precision in pneumatic HVAC controls, the 656 600 operates on a standard 3 8 psi spring range, providing reliable