Tag Archives for expansion valve

Thermostatic-expansion valve

The thermostatic-expansion valve, used primarily in commercial refrigeration and air-conditioning, is a refinement of the automatic-expansion valve (see Fig. 11-3). A bellows or diaphragm responds to pressure from a remote bulb charged with a substance similar to the refrigerant in … Continue reading

16. January 2011 by admin
Categories: Controlling Refrigerant | Tags: , | Leave a comment

Automatic-expansion valve

The automatic-expansion valve controls liquid flow by responding to the suction pressure of the unit acting on its diaphragm or bellows (see Fig. 11-2). When the valve opens, liquid refrigerant passes into the evaporator. The resulting increase in pressure in … Continue reading

16. January 2011 by admin
Categories: Controlling Refrigerant | Tags: , | Leave a comment

Hand-expansion valve

Of the several types of metering devices. the hand-expansion valve is the simplest (see Fig. 11-1). Used only on manually controlled installations, the hand-expansion valve is merely a needle valve with a fine adjustment stem. When the machine is shut … Continue reading

16. January 2011 by admin
Categories: Controlling Refrigerant | Tags: | Leave a comment