A thermostatic steam trap is a steam trap that works by employing the concept of the temperature difference between steam and cool condensate and air. In this type of trap, steam increases pressure in a thermostatic element. This causes the thermostatic steam trap to close. When the non-condensable and condensate gases in the cooling leg back up, the temperature starts reducing and the thermostatic element contacts to open a valve. The quantity of backed-up condensate ahead of the thermostatic steam trap depends on steam pressure, load conditions, and pipe size. A thermostatic steam trap is also used to pass air from a system of steam. As the air collects, the temperature reduces and an air vent discharges air automatically at moderately below steam temperatures all-round the whole operating pressure range. Thermostatic steam traps can be available in either wafer-type elements or balanced pressure bellows. These steam traps are manufactured using a variety of materials such as carbon steel, stainless steel, and bronze. Thermostatic steam traps are used to handle light condensate loads.