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Installation and Maintenance Best Practices for Loose Flange Connections

Installation and Maintenance Best Practices for Loose Flange Connections

Apr 09,2024

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The Difference Between Electric Clamps and Flange Butterfly Valves and Its Selection

As one of the common valves in the current pipeline, the electric butterfly valve is used to achieve the intermediary quality of the pipeline system and the control of flow. It has been very widely used in many fields such as petroleum, chemical, metallurgy, hydropower and others. So in the commonly used electric butterfly valves, it can be divided into two types. Electric -pairing butterfly valve and electric flange butterfly valve, and these two valves have their own characteristics, and they are different in performance, which can be selected in different industries.

For these two valves, in addition to different structural forms, if they are in the same parameter, the difference is that the connection method is different, that is, the form of installation is different, depending on the live conditions.


1. The difference between electric clamping butterfly valve and electric flange butterfly valve

The thickness of the electric valve on the butterfly valve will be a bit thinner than the flange butterfly valve. There is no flange at both ends of the valve body. There are only a few orientation bolt holes. The space is relatively narrow, or there are restrictions on the pipeline. The advantage is that disassembly is more convenient. The valve cost is low and the space occupies small, but the disadvantage is that there is a problem with a seal. Both cover must be disassembled!

The ends of the electric flange butterfly valve have flanges at both ends of the valve, which are connected to the pipeline flange. The sealing properties will be more reliable than the clamping butterfly valve. They are generally used in places with large caliber or higher pressure, but the cost is higher than electric clamping butterfly valve.


2. The selection between the electric and the flange butterfly valve

However, there are still some things to pay attention to in design. For example, the bolt of the butterfly valve is generally relatively long. Under high temperature, it may cause leaks after the bolt swells, so it is not suitable for large tube diameters under high temperature conditions. Another example is an occasion that cannot be used for the end and downstream of the pipeline for the butterfly valve, because when the flange is disassembled in the next reaches, the clamp valve will fall off. In order to disassemble, and the flange butterfly valve does not have the above problems, but the cost will be relatively high.


Our MSTN service fields include petrochemical, chemical, oil and natural gas, mining, oil refining, power generation, general industrial, long-distance pipelines and high temperature, high pressure and ultra -low temperature environment in water treatment. We provide ordinary valves, such as ball valve, deeper valve, stop valve, gate valve, etc. In addition, we can provide special applications or customized valves, such as balance valves, cyclical valves, filters, heat system and other related valves. Welcome everyone to consult online!

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