Four Seasons expansion devices are specifically calibrated to provide proper flow to the evaporator as well as restricting or modulating high pressure liquid causing a pressure drop to lower the refrigerant temperature. They also provide optimum cabin comfort for both the driver and passengers.
Four Seasons expansion valves are built to match O.E. design. After assembled, each valve is tested and calibrated to match it’s O.E. specifications. Some competitors build multiple valves to just one specification setting which can lead to poor cooling performance.
Power Element (Diaphram)
Equalizing Pressure Port
Temperature Sensing Element
Pushrod Upper Guide and Seal Plug
Ball and Seat
Remote bulb and capillary tube (temperature sensing element)
Ball and seat
External equalizing capillary tube
Fixed Orifice Tube - Must be replaced with compressor