旋塞阀一般应用在不同的领域，但是如何选择合适的类型呢?在本文中，我们将对其进行简要介绍。1.润滑旋塞阀这种类型的旋塞阀采用在旋塞面和阀体阀座之间的压力下注入润滑油，这样可以减少摩擦和密封端口。对于包括研磨颗粒在内的流体，如污染的上游应用、带有旁通阀的天然气管道系统，它们的性能都很好。2.非润滑旋塞阀非润滑旋塞阀的阀座部分配有套筒，可以减少旋塞和阀体之间的摩擦，它更常用于不需要太多维护的应用，如硫、氟化氢。但由于套筒为非金属材料，在温度和压力上有一定的限制。3.偏心旋塞阀偏心旋塞阀只有一半，当您需要更高的阀座力和最小的摩擦，从开启到关闭位置，您可以考虑偏心旋塞阀。

如何维护阀门，使其更好的为我们服务?1.阀门应储存在干燥通风的室内，并堵住出入的两端。2.安装和使用中的阀门应定期检查，以确保其正常运行。3.检查阀门密封面是否磨损，根据情况进行修复或更换。4.检查阀门阀杆和阀杆螺母。如果包装过期，应进行更换。 5. The sealing performance of the valve shall be tested to ensure its performance. 6. The valve in operation should be in good condition, flange and bracket bolts are complete, threads are not damaged, no loosening phenomenon. 7. If the valve is used in a poor environment, vulnerable to rain, snow, dust, sand and other contaminants, it should be installed for the valve stem protective cover.

浮动球阀球阀的球体浮动，在中压的作用下，球体可以产生一定的位移并在出口端上压在密封面上，确保出口密封。浮动球阀的结构很简单，密封，但是在工作介质下方的球的负载通过了出口密封圈，因此需要考虑密封环材料是否能承受球体的工作负荷当受更高压力影响时，介质和球体可能被偏移。该结构通常用于中型和低压球阀。耳轴球阀球阀的球体固定，压力后不会移动。固定球阀配有浮动座椅，受介质压力，产生座椅移动，使得密封环被压在球体上以确保密封。轴承通常安装在上部和下轴上，带球。用于操作的小扭矩导致其适用于高压和大尺寸阀门的适用性。弹性球阀球阀的球体是弹性的。球体和座椅密封环由金属材料制成。 This valve is suitable for high-temperature and high-pressure media. An elastic sphere is an elastic slot at the lower end of the wall inside the sphere, which obtains elasticity. When closing the channel, use the wedge head of the stem to make the sphere rise and hold to tighten to seal. Release the wedge head before turning the sphere, and the sphere reverts to its original shape, allowing for a small gap between the sphere and the seat, reducing friction and operating torque of the sealing surface. V Type Ball Valve The V-shaped regulating ball valve has a shear effect on the seat because the core has a V-shaped structure. Therefore, it is suitable for paper, chemical, metallurgy and other industrial enterprises containing fiber or tiny solid particles in the suspension fluid medium of the relevant process parameters control. V-ball valve belongs to the fixed ball valve and has a single seat. Its adjustment performance is the best ball valve. Plus, its flow characteristics are equal percentage, adjustable ratio of up to 100:1. Three-way Ball Valve The tee ball valves are T-type and L-type. The T-type can connect three orthogonal pipes to each other and cut off the third channel, which acts as a diversion and convection. The L-type can only connect two orthogonal pipes to each other, and cannot maintain the interconnection of the third pipe at the same time, only for distribution.

虽然闸阀和刀闸阀有许多相似之处，例如，它们都用于开关应用，但存在着更根本的区别。工作原理闸阀是通过将楔形闸板从流体通道中提起而开启的。它只用于关闭。以前，一般的闸阀用于纸浆和造纸工业，但是粘稠的纸浆会卡在楔形闸板和阀座之间，导致流量无法关闭。针对这一问题，设计了刀闸阀。它有一个锋利的边缘，可以切断纸浆，保持液体流动。如前所述，闸阀用于许多需要关闭阀的工业应用，如发电厂、水处理、采矿和海上应用。可用于高温高压等苛刻环境。刀闸阀是浆液应用的首选，因为它们的刀可以很容易地切割浓稠液体。应用范围包括但不限于稠油、轻脂、浆料、纸浆、清漆和废水等。 ADVANTAGES AND DISADVANTAGES The advantage of gate valves is that they are bi-directional, suitable for demanding working conditions like high pressure & high temperature. Besides, it is quite efficient that there won’t be much pressure drop when gate valves is fully open. However, the torque of gate valves will be larger compared with other types of valves, so they will need a large force to open and close. For larger sizes, pneumatic or electric actuators will be a must, and this, of course, will lead to higher cost. Also, they take longer time to operate and need more space for installation. By contrast, knife gate valves are cheap, light and easy to operate, but the design makes them only limited to low-pressure working environment.

偶尔我们将看到一些相对大的阀门安装旁通阀。旁路阀的功能是什么？在哪些情况下您需要安装它们？相应设备的旁路阀的尺寸是多少？实际上，旁通阀的两个主要功能用于保护和紧急情况。保护旁通阀可以通过高压保护主阀免受破坏。在打开高压管道之前，压力通过旁通阀释放，以避免高压突然浪涌和对下游阀的影响。另外，阀门两端之间的压力差太大，这将导致可能损坏阀门的高扭矩。因此，在释放旁路压力之后打开阀门。紧急最大的优势是，当主阀门发生故障或需要维护和维修时，可以通过打开旁通阀而不会影响正常生产的管道循环。 When do we need a bypass valve? When the main valve is with specifications below, we can install a bypass valve. (Just for reference) 2.5MPa, DN400 above 4.0MPa, DN250 above 6.4MPa, DN200 above 10MPa, DN150 above When the main valve is between DN100~DN200,its bypass valve should be DN20; When the main valve is between DN250~DN600, its bypass valve should be DN25; When the main valve is above DN600, its bypass valve should be DN40.

当阀完全打开时，防止介质泄漏到填充盒中的密封装置被称为后部。当闸阀，全球阀和节流阀处于关闭状态时，体腔中没有或很小的压力，因此杆填料的压力很小。打开时，填料受到工作压力。如果存在后部结构，可以防止工作介质压力作用在密封填料上，并且可以延长密封填料的寿命，使得阀门没有外部泄漏。另一个功能是当密封填料处存在泄漏时，阀可以完全打开以密封上密封部分，从而可以松开包装腺或填料套以更换包装。因此，闸阀，全球阀和节流阀所需的上密封装置。