我们经常将2英寸视为分界线，以决定阀门的锻造或铸造。与其他阀门不同，球阀的制造方法不受阀尺寸。即使对于大尺寸的球阀，我们也会有时使用锻造方式。与铸钢球阀相比，锻造钢球阀可以承受更多的强度和更可用的。原材料锻造的质量具有更好的质量，缺陷较差。对于高压工作状态，我们最好选择锻造钢球阀。铸球阀门的重量较少，成本低于锻造。厦门Dervos是一家API认证的止回阀制造和贸易公司，专门生产各种阀门。除了球阀外，我们还生产其他工业管道阀门，如闸阀，圆形阀门，塞阀和蝶阀。要了解有关我们行业领先产品的更多信息，请立即与我们联系。

作为管道中的部件，阀门控制流体的连接和切断。阀门就像汽车上的刹车片，一个人破裂，可能会导致意外后果。因此，阀门的性能和使用寿命直接影响系统的操作。如果阀门损坏，则系统必须关闭系统进行维护，损耗带来的损耗大致超过了这种阀门的成本。阀门的质量和寿命非常重要。波纹管密封地球阀在两个方面都特别出色。它的双密封保证零泄漏，但在氦质谱测试中也达到零泄漏。非常安全可靠。波纹管可以在没有损坏的情况下循环超过10,000次，大大超过普通全球阀门包装密封的使用寿命。此外，波纹管密封阀可以防止外部灰尘进入阀体以确保介质的清洁度。 In conditions such as high-purity silicon powder, pure oxygen, food, vacuum and other working conditions, the bellows globe valves still have a very outstanding performance. In the process of switching, common globe valves will see dynamic friction between packing and stem, and the packing will be worn and fail. When globe valves are in high and low-temperature occasions, their packing will expand or contract, packing changes, resulting in packing seal failure; As for low-temperature conditions, the packing is easy to freeze, the packing is easy to be scratched by ice in the witching process. In short, the advantages of the bellows globe valve compared with the ordinary globe valve can be summarized as follows. 1. The bellows globe valve can meet the request of zero external leakage in helium mass spectrometry. 2. The service life of the bellows sealed globe valve is much higher than that of the common globe valve, whose packing is susceptible and replacement frequency is higher. 3. The bellows sealed globe valve has a metal barrier at the stem seal, which can be used in working conditions where absolute isolation is required inside and outside the valve. 4. The bellows of the bellows sealed globe valve can expand and contract, which is not affected by thermal expansion and contraction, and it has very obvious advantages in the occasion of large temperature differences. 5. The bellows valve has double sealing. the bellows instinct, the packing is completely isolated from the medium, which protects the packing well and greatly extends the service life. Dervos is a leading valve manufacturer and provider of engineered products for different industries. If you’re looking for feasible solutions, check out our vast range of high-quality valves which includes gate valves, ball valves, butterfly valves, as well as other control valves and more. For more information regarding our high-quality products, contact us today.

有时在某些应用中很难选择使用刀闸阀还是蝶阀。两者都有各自的优点，都应该根据媒体和使用方式来选择。这两种都可以手动操作（手轮、齿轮箱或杠杆）以及气动或电动执行机构。在做出选择之前，请询问以下问题：l介质是否具有研磨性？会有大量悬浮物吗？l关闭时，管线中是否可能存在固体物质？如果上述任何一个问题的答案是肯定的，刀闸阀是你应该有的。刀闸阀的典型应用包括：厦门德孚是一家通过API认证的止回阀生产和贸易公司，专业生产各种阀门。除此之外，我们还生产其他工业管道阀门，如球阀、截止阀、旋塞阀和蝶阀。欲了解更多有关我们行业领先产品的信息，请立即联系我们。

对夹式止回阀是一种通用的流体单向阀，重量轻，体积小，易于安装在法兰之间。阀门内部由两个半圆形拉紧弹簧和用销固定在阀体上的板组成。流动的液体使弹簧变形并通过阀门。当弹簧失去流体压力时，阀门关闭。弹簧变形快，使管道不受水锤的破坏。在安装对夹式止回阀1时，请记住这些。首先，优先顺序中的优先顺序，确保在安装对夹式止回阀时，打开方向和流向一致。2.将其置于垂直管道中，对于水平管道，垂直安装止回阀。3.在对夹式止回阀和蝶阀之间使用膨胀管。不要将它们直接连接到其他阀门上。4.使管接头和堵塞物远离阀板的工作半径。5.不要在对夹式止回阀的前面或后面安装减速器。6.当必须在弯管附近安装对夹式止回阀时，应留出足够大的空间。7.如果将对夹式止回阀放置在泵的出口处，应留出至少六倍于阀门直径的空间，以确保蝶板能被流体推动。厦门德孚是一家通过API认证的止回阀生产贸易公司，专业生产各类阀门。除对夹式止回阀外，我们还生产其他工业管道阀门，如闸阀、球阀、截止阀、旋塞阀和蝶阀。欲了解更多有关我们行业领先产品的信息，请立即联系我们。

晶圆凸耳蝴蝶阀的蝶形板安装在管道的横截面。在蝶形阀体的圆柱通道中，盘形蝶形板绕轴线旋转，旋转角度在0°和90°之间，并且当旋转到90°时，阀门完全打开。凸耳型蝶阀的结构凸耳型蝶阀连接在两个管道凸缘，双头螺栓之间。其结构简单，体积小，重量轻，仅由几个部分组成。通过旋转90°，可以快速打开和关闭，阀门具有良好的流体控制特性。当蝶阀处于完全打开位置时，蝶形板的厚度是介质流过阀体时的唯一电阻，因此通过阀门产生的压降小，因此具有良好的流量控制特性。双偏移蝶阀具有两种类型的密封，弹性密封和金属密封。对于弹性密封阀，可以在阀体上设定密封件或附接到蝶形板周边。凸耳型蝶阀蝶阀的应用不仅广泛应用于石油，天然气，化工，水处理等的一般行业，而且还用于热电站的冷却水系统。用于硫酸工业中的气体管道：炉子前鼓风机入口和出口，继电器风扇入口和出口，电雾消除串联和耦合阀，S02主鼓风机入口和出口，转换器调节，预热器入口和出口等。调节和 cut off gas volume use. It is used for sulfur burning, conversion, dry suction section in sulfur acid system, and is the preferred brand of valve for sulfur acid device, and is considered by the majority of users as a butterfly valve with good sealing performance, light operation, vice corrosion, high temperature resistance, easy operation, flexibility, safe and reliable use, and has been widely promoted and used. Lug type butterfly valve is also widely used in: chemical, petrochemical, smelting, pharmaceutical, food and other industries in SO2, steam, air, gas, ammonia, CO2 gas, oil, water, brine, lye, seawater, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid and other media in the pipeline as a regulating and intercepting device use. Structural features of lug type butterfly valve ①The unique design of three-way eccentric makes the sealing surface frictionless between the transmission, which prolongs the service life of the valve. ②Resilient seal generated by torque. ③The ingenious wedge design makes the valve have the automatic sealing function of tightening the more it is closed, with compensating and zero leakage between the sealing surfaces. ④Small volume, light weight, light operation and easy installation. ⑤Pneumatic and electric devices can be configured according to user requirements to meet the needs of r...

用于水应用的止回阀需要尽可能多的考虑因素，因为您将收集在任何其他阀门选​​择中。与各种其他介质相同，水有自己独特的特征曲线，应容纳在阀门上，以便在这些介质中使用。当然，这是一个简单的事情，但是在选择水的完美止回阀时可能包括一些不太明显的原因。水输送水锤的问题：虽然这种液压问题可以在其他流体中辨别出来，但是当介质被迫突然停止或改变方向时，水锤击。随着水或其他介质被困在管道中，只有两个方向通过，就是管道和管道噪声的振动。两者都伤害了这个系统。运输水是无数应用中的普通件，但现在仍然是一个硬壳，因为它几乎不可能无限期地保持流动。水锤最常见的原因是泵停止工作而没有任何警告。水流回泵，因为止回阀无法快速反应。水锤有时被称为水猛击。反向流动：如果不加以检查，水或任何介质的反向流动可以向后旋转泵，导致意外损坏。 Likewise,if water flows in the wrong direction, for any length of time, it will hurt the entire system seriously. Unlike a back flow preventer, which consist of, work in andem with multiple check valves, a single check valve is not a panacea. Valve chatter: Valve chatter occursif valves open and close constantly and frequently. Valve chatter can cause damage to the valve and piping and can inflict total failure to the system. Checking for water problems Though check valves areremarkable reliable and endless new model and design are brought to the field every year, all problems theytry to answer to are just these three listed above. Due toits simple structure, it can be immune from external factorslike power failure, but is still affected by flow direction, and by check valve design features and defects. There are two basic designs of check valves. One uses a disc (basically a flap) and one uses a free floating ball. They both have a single direction, which means that their job is to prevent water from flowing backwards through the pipe. Both types have advantages and disadvantages, but perform the same job with fairly equal success.Ultimately, however, the success of a check valve rest with an not-too-fast-or-too-slow action. Finally, like most valves, its sealing performance determines the success of a check valve . All of these things should be taken into account when selecting a check valve.