It is a device that works behind the scenes to help achieve a desired temperature.
Beside the capillary tube, the thermostatic expansion valve is used widely in the refrigeration and air conditioning systems. While the capillary tube is used in the small domestic systems, the thermostatic expansion valve is used in the systems of higher capacities. Thermostatic expansion valve or TEV is one of the most commonly used throttling devices in the refrigerator and air conditioning systems. The thermostatic expansion valve is the automatic valve that maintains proper flow of the refrigerant in the evaporator as per the load inside the evaporator. A 3/4 thermostatic single-handled valve is the most common thermostatic valve that is usually installed in a custom shower; but a thermostatic valve wasn't really designed for comfort. It was designed for safety. Transfer Valves. Used in conjunction with a Rite-Temp® pressure-balancing valve or with thermostatic and volume control valves, the 3-way transfer valve lets you control three different outputs to six different output options with a simple turn of the handle. Thermostatic expansion valve: An air conditioner thermal expansion valve or TEV or just expansion valve (tan colored device in the photo) is a device located at the cooling coil and connected between the incoming refrigerant line and the refrigerant inlet to the cooling coil in the air handler. The air conditioning system thermal expansion valve, or more properly called a thermostatic expansion valve, or TEV is a metering device which regulates the flow of refrigerant from the incoming high pressure side (from the compressor/condenser) into the low pressure side (in the cooling coil). A thermostatic mixer maintains an exact water temperature for the duration of your shower. It protects you from any sudden changes in the water supply to the shower, so even if somebody flushes the toilet or turns on the kitchen faucet the temperature of your shower will remain the same. Used in conjunction with a Rite-Temp® pressure-balancing valve or with thermostatic and volume control valves, the 3-way diverter valve lets you control three different outputs with a simple turn of the handle. A thermostatic valve is a device that works behind the scenes to help achieve a desired temperature. It can be used for a range of purposes, such as maintaining a consistent temperature in a room or controlling the temperature output of water from a faucet or showerhead.
http://www.brighthubengineering.com/hvac/58501-thermostatic-expansion-valve-or-tev/ http://www.brighthubengineering.com/hvac/58501-thermostatic-expansion-valve-or-tev/ http://www.plumbingpro.com/showers-baths-faq/what-is-a-thermostatic-shower-valve http://www.us.kohler.com/us/How-to-Shop-for-Shower-Valves-and-Controls/content/CNT800387.htm http://c.ymcdn.com/sites/www.rfmaonline.com/resource/resmgr/crfp/guidetothermostaticexpansion.pdf http://c.ymcdn.com/sites/www.rfmaonline.com/resource/resmgr/crfp/guidetothermostaticexpansion.pdf http://www.grohe.com/us/5897/bathroom/faucet-trends-designs/thermostatic-mixer-benefits/ http://www.us.kohler.com/us/How-to-Shop-for-Shower-Valves-and-Controls/content/CNT800387.htm http://www.wisegeek.com/what-is-a-thermostatic-valve.htm
what is thermostatic valve