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I. What is a steam trap? A steam trap is a device installed in systems that require steam; it is designed to automatically remove condensate, air, and non-condensable gases from the steam system, while preventing steam from escaping. II. Important functions of steam traps: (1) They can quickly remove the condensed water that is generated ； (2) Prevent steam leakage ； (3) Remove air and other non-condensable gases. III. The necessity of removing condensate and air from steam-using equipment: (1) Preventing water hammer: If there is condensate in the steam pipes, the high-speed flow of steam drives this condensate to strike violently against the pipe walls, valves, and steam-using equipment, thereby causing damage to these components at the bends in the pipes, as well as at the valves and equipment itself. (2) Preventing a reduction in the efficiency of steam-using equipment: Steam-using equipment (especially indirect heating devices) is designed to make effective use of the latent heat of steam. Excessive condensate retained in these devices comes into contact with the heating surfaces, reducing the heating area and causing uneven heating from top to bottom, thereby significantly lowering the efficiency of the equipment. (3) Preventing corrosion inside equipment used for steam: When water and oxygen in the air come into contact with the equipment, chemical reactions occur that cause rusting. (4) Preventing damage to steam-using equipment: Due to the difference in temperature between steam and water, condensate water within the equipment creates local temperature differences, resulting in thermal stress that can cause damage to the equipment. IV. Specific requirements regarding the functions of steam traps, energy-saving measures, operation, maintenance, and management: (1) No steam leakage when draining condensate water ； (2) It is possible to remove all the condensate water from anywhere in the steam system ； (3) Capable of discharging both air and condensed water simultaneously ； (4) Wide applicable pressure range ； (5) Easy to maintain and service: simple structure with few moving parts ； (6) High practicality: small size, light weight, long service life, low cost, and no loss of emission capacity due to air or steam.