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This post was last edited by Sammy_Wang on 2015-6-26 at 13:48. The function of a steam trap is to automatically remove condensed water and non-condensable gases such as air from heating equipment or steam pipelines, without allowing any steam to escape. Due to its function of blocking steam and allowing air to escape, the steam trap enables uniform heating in steam heating equipment, making full use of the latent heat of steam to prevent water hammer in steam pipes. The following summary outlines the specific requirements for various aspects of steam trap operation, including its functions, energy-saving measures, operation, and maintenance. (1) No steam leakage when condensate is discharged. Not leaking steam when condensate is excluded is the most basic requirement for a steam trap. Therefore, although it is a device for removing condensate water that accumulates due to separation from steam, it is not called a condensate water trap, but rather a steam trap. Accurate and sensitive operation of a steam trap refers to its ability to open and close in response to condensate. That is, when condensate water is excluded, the steam trap opens fully to allow rapid discharge ； It can be quickly shut off at the end of discharge to prevent the loss of valuable steam. These are the main performance characteristics of a steam trap. In other words, a steam trap can only be in either fully open or fully closed state. If its opening and closing actions are slow or incomplete, throttling will occur, which can lead to damage to the steam trap as a whole; it is also the main cause of steam leakage. As mentioned above, the operation principle of a steam trap is to be fully open or fully closed, that is, it operates in an on or off manner. Depending on the type, there may also be two types: continuous emission and intermittent emission. (2) It is possible to remove all condensate water from anywhere in the steam system. A steam trap must be capable of efficiently and accurately removing the condensate water generated in the piping of steam-using equipment, main devices such as heat exchangers, and any other part of the steam system. (3) It can discharge air and condensed water simultaneously. The air mixed into steam equipment is initially present in the steam, and it is separated only when the steam condenses into water. It forms an air layer on the heat transfer surface of steam-using equipment, severely affecting heat conduction; therefore, the air must be removed. (4) It has a wide applicable pressure range. For pressure relief valves, any slight change in pressure affects their performance; it is even impossible for them to continue operating. In such cases, it is necessary that their performance remains unaffected and that they can function under any pressure. At the same time, it is required that the backpressure tolerance of the steam trap be high. (5) Easy to repair and maintain. This requirement is related to the structure of the steam trap. The steam trap is required to have a simple structure with few moving parts. To prevent stress from being generated in the moving parts of the valve, appropriate materials should be chosen as much as possible; more importantly, its structure must be easy to machine. In short, steam traps should not require dedicated personnel for regular maintenance, thereby reducing repair costs. (6) High practicality. Hydrophobic valves should be small in size, light in weight, have a long service life, and be inexpensive. Moreover, they should not lose their drainage capacity due to the presence of air or steam, avoiding incidents such as air blockages and steam lockouts.