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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
significantly reducing labor time for mechanical contractors
typically jumper-selectable between 0-2000 ppm and 0-5000 ppm
Does this assembly include the orifice
ensuring proper venting and exhaust flow according to manufacturer specs
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