对夹式蝶阀和法兰式蝶阀连接方式不同

The connection methods of clamp butterfly valve and flange butterfly valve are different

对夹和法兰是两种不同的连接方式。

Clamp and flange are two different connection methods.

对夹式蝶阀：阀体上没有带法兰，用双头螺栓将阀门连接在两管道法兰之间，就是两片法兰把蝶阀来夹在其中，然后用螺栓把两片法兰给固定住。

Clamp type butterfly valve: There is no flange on the valve body, and the valve is connected between two pipeline flanges with double headed bolts. This means that two flanges clamp the butterfly valve between them, and then the two flanges are fixed with bolts.

法兰式蝶阀：阀体上带有法兰，用螺栓将阀门上两端法兰连接在管道法兰上就可以了。

Flange butterfly valve: The valve body is equipped with a flange, and the flanges at both ends of the valve are connected to the pipeline flange with bolts.

对夹式蝶阀和法兰式蝶阀结构不同

The structure of clamp butterfly valve and flange butterfly valve is different

对夹式蝶阀配的螺栓比较长，且本身没有法兰，所以一般不要安装在管道末端和下游需要拆卸的位置，因为在拆卸下游法兰时，对夹式的阀门会掉落，这样阀门两端的管道都不能正常工作了；而法兰蝶阀没有存在这样的问题，法兰本体就有法兰，与管道上的法兰配对时，用螺栓连接，螺母锁紧，所以当一端被拆掉，也不会影响另外一端的运行。

The bolts used for the clamp type butterfly valve are relatively long and do not have flanges, so it is generally not recommended to install them at the end of the pipeline or downstream where disassembly is required. This is because when disassembling the downstream flange, the clamp type valve will fall off, causing the pipelines at both ends of the valve to not function properly; However, flange butterfly valves do not have such problems. The flange body has a flange, and when paired with the flange on the pipeline, it is connected with bolts and locked with nuts. Therefore, when one end is removed, it will not affect the operation of the other end.

对夹式蝶阀和法兰式蝶阀造价不同

The cost of clamp butterfly valve and flange butterfly valve is different

对夹式蝶阀的螺栓长度较长。对施工精度要求较高，如果出现两面的法兰不对中，螺栓就会受到比较大的剪切力，导致阀门容易泄漏；相比之下，对夹式蝶阀拆卸会更方便一些，阀门造价较低，但有缺点是，如果一个密封面出问题，那么两个密封面都得拆开。

The bolt length of the clamp type butterfly valve is longer. High precision is required for construction. If the flanges on both sides are misaligned, the bolts will be subjected to significant shear force, leading to valve leakage; In contrast, the disassembly of clamp type butterfly valves is more convenient and the cost of the valve is lower. However, the disadvantage is that if one sealing surface has problems, both sealing surfaces need to be disassembled.

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