Capillary tube

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Definition

  • Small bore tube used for metering by controlling length and bore size. In refrigeration, a tube of small internal diameter used as a refrigerant pressure and flow control between high and low sides.[1]
  • Tube used to transmit pressure from the sensitive bulb of some temperature controls to the operating element.[1]
  • Refrigerating capillary tube is a tube of small bore [down to 0.020 in. i.d. (0.50 mm)] used for the simultaneous purposes of metering the refrigerant and of accomplishing the expansion process between condenser and evaporator in refrigerating systems.[1]

References

  1. ASHRAE Technical Committee (TC) 1.6, Terminology
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