expansion valve

A part of an air-conditioning system, located between the condenser and the evaporator that regulates the flow of liquid refrigerant to the vaporator. If cooling needs are low, the valve is almost closed; as additional cooling is required, the valve opens wider so that more liquid refrigerant flows to the evaporator. It reduces the pressure from the high side to the low side and is operated by pressure. Also called an automatic expansion valve (AEV) or "thermostatic expansion valve."

Dictionary of automotive terms. 2015.

Look at other dictionaries:

  • Expansion valve — Expansion Ex*pan sion, n. [L. expansio: cf. F. expansion.] 1. The act of expanding or spreading out; the condition of being expanded; dilation; enlargement. [1913 Webster] 2. That which is expanded; expanse; extend surface; as, the expansion of a …   The Collaborative International Dictionary of English

  • expansion valve — noun : a valve through which liquid or gas under pressure is allowed to expand to a lower pressure and greater volume …   Useful english dictionary

  • Expansion valve — Расширительный клапан …   Краткий толковый словарь по полиграфии

  • Expansion Valve —   The device that reduces the pressure of liquid refrigerant thereby cooling it before it enters the evaporator coil in a heat pump …   Energy terms

  • Thermal expansion valve — A thermostatic expansion valve (often abbreviated as TXV or TX valve) is a component in refrigeration and air conditioning systems that controls the amount of superheat at the outlet of the evaporator. This is accomplished by use of a temperature …   Wikipedia

  • automatic expansion valve — (AEV) pressure controlled valve which reduces high pressure liquid refrigerant to low pressure liquid refrigerant. See expansion valve …   Dictionary of automotive terms

  • thermostatic expansion valve — [1] Metering device that removes pressure from liquid refrigerant, permitting it to expand and vaporize in evaporator [2] Control valve operated by temperature and pressure within evaporator. It controls flow of refrigerant. Control bulb is… …   Dictionary of automotive terms

  • Expansion — Ex*pan sion, n. [L. expansio: cf. F. expansion.] 1. The act of expanding or spreading out; the condition of being expanded; dilation; enlargement. [1913 Webster] 2. That which is expanded; expanse; extend surface; as, the expansion of a sheet or… …   The Collaborative International Dictionary of English

  • Expansion coupling — Expansion Ex*pan sion, n. [L. expansio: cf. F. expansion.] 1. The act of expanding or spreading out; the condition of being expanded; dilation; enlargement. [1913 Webster] 2. That which is expanded; expanse; extend surface; as, the expansion of a …   The Collaborative International Dictionary of English

  • Expansion curve — Expansion Ex*pan sion, n. [L. expansio: cf. F. expansion.] 1. The act of expanding or spreading out; the condition of being expanded; dilation; enlargement. [1913 Webster] 2. That which is expanded; expanse; extend surface; as, the expansion of a …   The Collaborative International Dictionary of English

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.