any substance used to provide cooling (as in a refrigerator)
causing cooling or freezing; "a refrigerant substance such as ice or solid carbon dioxide"
(refrigeration) the process of cooling or freezing (e.g., food) for preservative purposes
A membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, that maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow
A device for controlling the passage of fluid through a pipe or duct, esp. an automatic device allowing movement in one direction only
(valve) a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
(valve) control consisting of a mechanical device for controlling the flow of a fluid
A cylindrical mechanism in a brass instrument that, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes
(valve) device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
Red Dot-TXV diagnosis
The thermal expansion valve—TXV—regulates the flow of refrigerant into the evaporator (the inlet is the hole on the bottom). The TXV is a needle valve and depends on clean, moisture-free refrigerant to work properly. If the valve becomes clogged, the refrigerant no longer circulates, and the A/C system fails.
Valve-body
This is the valve-body that distributes refrigerant between the three units on the second circuit. The master feed from the compressor on the bottom, the fan-outs on the right. Note the insulated shrouds around the external valve bodies, to prevent condensation - and the tap-off for the condensate drain.