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Expansion Devices

Full Product Listing http://ecatalog.smpcorp.com/fs/#/searchparts/searchText/expansion?type=p&search=s

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Pressure Regulators

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.

Expansion Valves

Features

    • Block Valves are aluminum construction; all internal parts are designed OE specifications.
    • Internally and Externally Equalized Valves are copper and brass construction
    • Designed to meet or exceed OE specifications.
    • Tubes to Cap connections are double soldered to insure integrity.
    • Coverage includes both forward and reverse flow designs.
    • Tonnage and Superheat is matched to OE specifications.
    • Power valve is seasoned for 30 days assembled and 100% function tested prior to shipping.

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

Pushrod Seal

Pushrod

Ball and Seat

Superheat Spring

Retainer Plug

Remote bulb and capillary tube (temperature sensing element)

Power valve

Pushrod

Ball and seat

Inlet

External equalizing capillary tube


Orifice Tube

Features

  • Separates High Side from low side
  • Regulates flow of liquid refrigerant into evaporator. (Creates restriction)
  • Refrigerant boils (evaporates) upon entering low pressure area in evaporator

 Fixed Orifice Tube - Must be replaced with compressor

  • Refrigerant flows through fixed diameter tube- Diameter set by system design
  • Flowrate determined by pressure drop across orifice & tube diameter
  • Performance optimized at highway speeds
  • Orifice Tubes are built application specific per OEM size and color

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Orifice Tube

Diffuser