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The Schneider Electric MK-4621-422 is a heavy-duty pneumatic valve actuator designed for precise proportional control in HVAC systems
verify the vacuum tubing for obstructions before replacing the switch
06" internal diameter to effectively dampen refrigerant pressure pulsation
supporting both flush mount and surface mount configurations via a standard 1/8" NPT air connection
Mueller AI15504 Relief Valve 318172-701 The Schneider Electric MK-4621-422 isThe Mueller AI15504 Relief Valve is a veteran grade SafetyMaster pressure relief valve designed for mission critical overpressure protection in commercial refrigeration and HVAC systems. Engineered for high side application on liquid receivers, this straight through 425 PSI PRV features a 1 2 inch NPTFE inlet and a 5 8 inch flare outlet connection. The brass body construction, paired with a stainless steel spring and a resilient neoprene seat disc,