译文：
这类疏水阀是利用蒸汽和凝结水的温差引起感温元件的变形或膨胀带动阀芯启闭阀门。热静力型疏水阀的过冷度比较大，一般过冷度为15度到40度，它能利用凝结水中的一部分显热，阀前始终存有高温凝结水，无蒸汽泄漏，节能效果显著。是在蒸汽管道，伴热管线、小型加热设备，采暖设备，温度要求不高的小型加热设备上，最理想的疏水阀. 热静力型疏水阀有膜盒式、波纹管式、双金属片式 1、膜盒式疏水阀： 膜盒式疏水阀的主要动作元件是金属膜盒，膜盒内充有一种汽化温度比水的饱和温度低的液体,有开阀温度低于饱和温度15℃和30℃两种可供选择。膜盒式疏水阀的反应特别灵敏，不怕冻，体积小，耐过热，任意位置都可安装。背压率大于80%，能排不凝结气体，膜盒坚固，使用寿命长，维修方便，使用范围很广。 装置刚启动时，管道出现低温冷凝水，膜盒内的液体处于冷凝状态，阀门处于开启位置。当冷凝水温度渐渐升高，膜盒内充液开始蒸发，膜盒内压力上升，膜片带动阀芯向关闭方向移动，在冷凝水达到饱和温度之前，疏水阀开始关闭。膜盒随蒸汽温度变化控制阀门开关，起到阻汽排水作用。 2、波纹管式疏水阀： 波纹管式疏水阀的阀芯不锈钢波纹管内充一种汽化温度低于水饱和温度的液体。随蒸汽温度变化控制阀门开关，该阀设有调整螺栓，可根据需要调节使用温度，一般过冷度调整范围低于饱和温度15℃-40℃。背压率大于70%，不怕冻，体积小，任意位置都可安装，能排不凝结气体，使用寿命长。 当装置启动时，管道出现冷却凝结水，波纹管内液体处于冷凝状态，阀芯在弹簧的弹力下，处于开启位置。当冷凝水温度渐渐升高，波纹管内充液开始蒸发膨胀，内压增高，变形伸长，带动阀芯向关闭方向移动，在冷凝水达到饱和温度之前，疏水阀开始关闭，随蒸汽温度变化控制阀门开关，阻汽排水。 3、双金属片式疏水阀： 双金属片疏水阀的主要部件是双金属片感温元件，随蒸汽温度升降受热变形，推动阀芯开关阀门。双金属片式疏水阀设有调整螺栓，可根据需要调节使用温度，一般过冷度调整范围低于饱和温度15℃-30℃，背压率大于70%，能排不凝结气体，不怕冻，体积小，能抗水击，耐高压，任意位置都可安装。双金属片有疲劳性，需要经常调整。 当装置刚启动时，管道出现低温冷凝水，双金属片是平展的，阀芯在弹簧的弹力下，阀门处于开启位置。当冷凝水温度渐渐升高，双金属片感温起元件开始弯曲变形，并把阀芯推向关闭位置。在冷凝水达到饱和温度之前，疏水阀开始关闭。双金属片随蒸汽温度变化控制阀门开关，阻汽排水。 　　

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原文：
Type of trap is the use of steam and condensation of water temperature caused by thermal expansion of components of the deformation or driven spool valves open and close. Static-type trap heat in relatively large undercooling, the general undercooling of 15 ° to 40 degrees, it can use part of the sensible heat of condensation water, the valve is always there before the high-temperature condensation of water, no steam leakage, energy-saving results are obvious . In the steam pipe, with heat pipes, small heating equipment, heating equipment, temperature and less demanding of small heating equipment, the best trap. Heat Static-type traps are bellows, corrugated tube, double-metal piece 1, bellows steam trap: The main action bellows trap components are metal film box, film box filled with a vaporization temperature lower than the water saturation temperature of the liquid, there are open valve temperature below saturation temperature of 15 ℃ and 30 ℃ two kinds to choose from. Bellows trap response to the special sensitivity, not afraid of cold, small size, resistant to overheating, any position could be installed. Back-pressure ratio greater than 80%, to row non-condensing gas, film boxes solid, long service life, easy maintenance, using a wide range. Device just starts the pipeline appears low-temperature condensate in the condensate liquid film box state, the valve in the open position. When the condensate water temperature gradually increased, the membrane began to evaporate liquid-filled box, the membrane box pressure rise, driven spool to close the diaphragm moving in the condensate to saturation temperature before the trap began to close. Diaphragm control valve with the steam temperature switch, play a role in blocking the drainage steam. 2, corrugated tube type steam trap: Bellows-type Traps spool of a stainless steel corrugated tube filled vaporization temperature is lower than the temperature of the liquid water saturation. With the steam temperature control valve switch, the valve has to adjust bolts needed to be adjusted according to temperature, the general cooling-degree adjustment range below the saturation temperature of 15 ℃ -40 ℃. Back-pressure rate of more than 70%, not afraid of cold, small size, can be installed at any position can be ranked non-condensing gas, long service life. When the device starts up, cooling off condensation water pipe, corrugated tube of liquid in the condensate state, under the spool in the spring elasticity, in the open position. When the condensate water temperature gradually increased within the fluid-filled bellows expansion began to evaporate, inner pressure increased, deformation elongation, led to the closure of the direction of spool movement, in the condensate to saturation temperature before the trap began to close, with the steam temperature control valve switch, blocking drainage steam. 3, pairs of metal-piece trap: Pairs of metal trap of the main components is a two-metal temperature sensing element, with the steam heat distortion temperature of movements to promote the switch valve spool. Bimetallic steam trap has to adjust bolts needed to be adjusted according to temperature, the general cooling-degree adjustment range below the saturation temperature of 15 ℃ -30 ℃, the rate of more than 70% back pressure can be ranked non-condensing gas, are not afraid of cold , small size, resistant to water hammer, high pressure, can be installed anywhere. There are pairs of metal fatigue, requiring constant adjustment. When the device has just started, low-temperature condensed water pipe occurs, double metal film is flat, the spool of elastic in the spring, the valve in the open position. When the condensate water temperature gradually increased, from bimetal temperature sensing element began to bend, and to spool into the closed position. In the condensate to saturation temperature before the trap began to close. Pairs of metal sheets with the steam temperature control valve switch, blocking drainage steam.