p>译文：

 

闸阀是作为截止介质使用，在全开时整个流通直通，此时介质运行的压力损失最小。闸阀通常适用于不需要经常启闭，而且保持闸板全开或全闭的工况。不适用于作为调节或节流使用。对于高速流动的介质，闸板在局部开启状况下可以引起闸门的振动，而振动又可能损伤闸板和阀座的密封面，而节流会使闸板遭受介质的冲蚀。从结构形式上，主要的区别是所采用的密封元件的形式。 根据密封元件的形式，常常把闸阀分成几种不同的类型，如：楔式闸阀、平行式闸阀、平行双闸板闸阀、楔式双闸板闸等。最常用的形式是楔式闸阀和平行式闸阀。这种类型的阀门的作用是只允许介质向一个方向流动，而且阻止方向流动。通常这种阀门是自动工作的，在一个方向流动的流体压力作用下，阀瓣打开；流体反方向流动时，由流体压力和阀瓣的自重合阀瓣作用于阀座，从而切断流动。其中止回阀就属于这种类型的阀门，它包括旋启式止回阀和升降式止回阀。旋启式止回阀有一介铰链机构，还有一个像门一样的阀瓣自由地靠在倾斜的阀座表面上。为了确保阀瓣每次都能到达阀座面的合适位置，阀瓣设计在铰链机构，以便阀瓣具有足够有旋启空间，并使阀瓣真正的、全面的与阀座接触。阀瓣可以全部用金属制成，也可以在金属上镶嵌皮革、橡胶、或者采用合成覆盖面，这取决于使用性能的要求。旋启式止回阀在xx打开的状况下，流体压力几乎不受阻碍，因此通过阀门的压力降相对较小。升降式止回阀的阀瓣座落位于阀体上阀座密封面上。此阀门除了阀瓣可以自由地升降之外，其余部分如同截止阀一样，流体压力使阀瓣从阀座密封面上抬起，介质回流导致阀瓣回落到阀座上，并切断流动。根据使用条件，阀瓣可以是全金属结构，也可以是在阀瓣架上镶嵌橡胶垫或橡胶环的形式。像截止阀一样，流体通过升降式止回阀的通道也是狭窄的，因此通过升降式止回阀的压力降比旋启式止回阀大些，而且旋启式止回阀的流量受到的限制很少。在生产过程中，为了使介质的压力、流量等参数符合工艺流程的要求，需要安装调节机构对上述参数进行调节。调节机构的主要工作原理，是靠改变阀门阀瓣与阀瓣与阀座间的流通面积，达到调节上述参数的目的。属于这类阀门的统称为控制阀，其中分为依靠介质本身动力驱动的称为自驱式控制阀如减压阀、稳压阀等，凡{lx1}上来动力驱动的（如电力、压缩空气和液动力）称为他驱式控制阀，如电动调节阀、气动调节阀和液动调节阀等。

“ valve performance characteristics, installation and maintenance of”是由提供的国际阀门新闻，译文仅供参考。另外，中国闸阀网还提供相关产品搜索：、、、、等。

 

原文：
Medium used as a cut-off valve in the full-time through the entire flow, this time the pressure medium to run minimal loss. Valve is usually applied to less frequent open and close, but also to maintain full-or full-closed gate of the working conditions. As a regulator or throttling does not apply to the use of. For high-speed flow of medium, open the gate in local conditions can cause the vibration of the gate, but they may damage the vibration damper and the valve seat sealing surface, while the throttling damper will suffer erosion of the medium. From a structural form, the main difference is that the sealing component used in the form of. According to the form of sealed components, often divided into several different types of valve, such as: wedge gate valve, parallel-type valve, parallel Shuangzha plate gate valve, wedge gate, etc. Shuangzha board. The most common form of wedge gate valves and parallel-type valve. This type of valve is the role of media in one direction only allows movement, but also prevents the direction of flow. Usually the valve is automatically work, the fluid flow in one direction under pressure, valve flap open; fluid flow in the opposite direction from the fluid pressure and valve flap valve flap from the coincidence of acting on the valve seat and thus cut off the flow. One check valve belonging to this type of valve, which includes Swing check valve and lift check valve. Swing Check Valve with ordinary hinge, there is a door the same as the free flap valve leaning tilt seat surface. In order to ensure that the valve flap seat every time to reach the right side position, the valve flap design in the hinge body to valve flap has enough room for a swing and make a real flap valve, comprehensive engagement with the valve seat. Valve flap can all be made of metal can also be embedded in the metal on leather, rubber, or synthetic coverage, depending on the use of performance requirements. Swing check valve in the fully open position, the fluid pressure virtually unimpeded, so the pressure drop through the valve is relatively small. Check the valve lift valve is located in the valve body on the valve seat sealing surface. In addition to this valve flap valve is free to lift, the other part of the same as the cut-off valve, the fluid pressure valve from the valve seat sealing surface of valve lift, medium return valve flap led to a seat on the back, and cut off the flow. According to conditions of use, the valve flap can be all-metal structure can also be rack mounted in the valve flap rubber mat or rubber ring form. The same as the cut-off valves, fluid channels through the lift valve is narrow, so that by elevating the pressure drop valve Swing check valve than the bigger, and the flow of Swing Check Valve restrictions on rarely. In the production process, in order to make media pressure, flow and other parameters meet the process requirements, need to install the adjusting mechanism to adjust these parameters. Regulating the organization's main working principle is to rely on changing the valve and the valve flap and the flap valve between the flow area of valve seat to achieve the purpose of regulating the above parameters. Such valves are referred to as control valves, which are divided into relying on media itself is called self-drive power-driven control valve such as valve, regulator valve, all leading up power-driven (such as electricity, compressed air and fluid power) as he was driving control valve, such as the electric control valve, pneumatic control valve and hydraulic control valve and so on.

原文来源：