译文：
这类疏水阀根据相变原理，靠蒸汽和凝结水通过时的流速和体积变化的不同热力学原理，使阀片上下产生不同压差，驱动阀片开关阀门。因热动力式疏水阀的工作动力来源于蒸汽，所以蒸汽浪费比较大。结构简单、耐水击、{zd0}背为50%，有噪音，阀片工作频繁，使用寿命短。 热动力型疏水阀有热动力式（圆盘式）、脉冲式、孔板式 1、热动力式疏水阀： 热动力式疏水阀内有一个活动阀片，既是敏感件又是动作执行件。根据蒸汽和凝结水通过时的流速和体积变化的不同热力学原理，使阀片上下产生不同压差，驱动阀片开关阀门。漏汽率3%，过冷度为8℃-15℃。 当装置启动时，管道出现冷却凝结水，凝结水靠工作压力推开阀片，迅速排放。当凝结水排放完毕，蒸汽随后排放，因蒸汽比凝结水的体积和流速大，使阀片上下产生压差，阀片在蒸汽流速的吸力下迅速关闭。当阀片关闭时，阀片受到两面压力，阀片下面的受力面积小于上面的受力面积，因疏水阀汽室里面的压力来源于蒸汽压力，所以阀片上面受力大于下面，阀片紧紧关闭。当疏水阀汽室里面的蒸汽降温成凝结水，汽室里面的压力消失。凝结水靠工作压力推开阀片，凝结水又继续排放,循环工作，间断排水。 2、圆盘式蒸汽保温型疏水阀： 圆盘式蒸汽保温型疏水阀的工作原理和热动力式疏水阀相同，它在热动力式疏水阀的汽室外面增加一层外壳。外壳内室和蒸汽管道相通，利用管道自身蒸汽对疏水阀的主汽室进行保温。使主汽室的温度不易降温，保持汽压，疏水阀紧紧关闭。当管线产生凝结水，疏水阀外壳降温，疏水阀开始排水；在过热蒸汽管线上如果没有凝结水产生，疏水阀不会开启，工作质量高。阀体为合金钢，阀芯为硬质合金，该阀{zg}允许温度为550℃，经久耐用，使用寿命长，是高压、高温过热蒸汽专用疏水阀。 3、脉冲式疏水阀： 脉冲式疏水阀有两个孔板根据蒸汽压降变化调节阀门开关，即使阀门xx关闭入口和出口也是通过{dy}、第二个小孔相通，始终处于不xx关闭状态，蒸汽不断溢出，漏汽量大。该疏水阀动作频率很高，磨损厉害、寿命较短。体积小、耐水击，能排出空气和饱和温度水，接近连续排水，{zd0}背压25%，因此使用者很少。 4、孔板式疏水阀： 孔板式疏水阀是根据不同的排水量，选择不同孔径的孔板，达到控制排水量的目的。结构简单，选择不合适会出现排水不及或大量跑汽，不适用于间歇生产的用汽设备或冷凝水量波动大的用汽设备。

“ Working principle of thermal power-type Traps ”是由提供的国际阀门新闻，译文仅供参考。另外，中国疏水阀网还提供相关产品搜索：、、、、等。

原文：
Such traps under the phase-change theory, relying on the passage of steam and condensate flow rate and volume changes in the different thermodynamic principles, so that the upper and lower valve films have different pressure, drive valve switch valve. Thermodynamic steam trap due to the work of power from steam, so steam waste is relatively large. Simple structure, water hit, the biggest back to 50%, there is noise, valve work frequently, and short service life. Thermal power-type traps with thermal power type (disc), pulse type, orifice plate 1, thermodynamic steam trap: Thermodynamic steam trap valve within an activity, not only sensitive parts is the implementation of action items. According to the passage of steam and condensate flow rate and volume changes in the different thermodynamic principles, so that the upper and lower valve films have different pressure, drive valve switch valve. Steam leakage rate of 3%, the supercooling of 8 ℃ -15 ℃. When the device starts, pipe cooling off condensed water, condensation water pushed by the pressure valve, rapid discharge. When the condensation of water discharge is completed, followed by emission of steam due to condensation of water vapor than the volume and flow, causing the upper and lower valves generate pressure, the steam valve of the suction flow rapidly closing. When the valve is closed and the valve under pressure on both sides of the valve area is less than the force below the force above the area, due to trap steam inside the pressure chamber from the steam pressure, so the force is greater than the above valve below valve tightly closed. When the steam trap steam inside the cooling chamber into a condensation of water vapor pressure inside the chamber disappear. Condensation of water pushed by the pressure valves, condensing water continued to discharge, cycle work, intermittent drainage. 2, disc-type steam trap insulation: Disc-type steam trap heat and thermal power of the working principle of the same type traps, which trap the thermal power of the steam room-style outside an additional layer of shell. Enclosure within the chamber and the steam pipe similarities, using its own steam pipe on the main steam rooms trap heat. So that the temperature of main steam room temperature is not easy to maintain steam pressure, trap tightly closed. When the pipeline produces condensation of water, trap enclosure cooling trap began to drain; in superheated steam pipeline without condensate production, trap does not open, the work of high quality. Body of alloy steel, as carbide valve core, the valve the maximum allowable temperature of 550 ℃, durable, long life is a high-pressure, high temperature superheated steam specific trap. 3, pulse-type steam trap: Pulse-type traps are two plates down according to changes in vapor pressure regulating valve switch, even if the valve is completely closed the entry and exit points are also through the first and the second hole interlinked, remains not fully closed, steam constantly overflow, large amount of steam leakage. The high frequency of trap action, wear terrible, short-lived. Small, water-resistant blow, can discharge the air and the saturation temperature of water, close to a continuous drainage, the largest 25% of back pressure, so users rarely. 4, orifice plate steam trap: Orifice plate steam trap is based on a different displacement, choose a different aperture of the orifice, to control displacement purposes. Structure is simple, choose to drainage is less than or inappropriate will be running a large number of gas, does not apply to intermittent use of production equipment or condensation of water vapor fluctuations in a large steam equipment.