Comparative Analysis Of Welded Butterfly Valve And Clamp Butterfly Valve

Welded butterfly valves and clamped butterfly valves are common sanitary valves used to control the flow of fluids. They have some notable differences in structure and application.

The welded butterfly valve is a butterfly valve in which the valve body and the pipe are welded together. Its main feature is its compact structure and the absence of additional joints, which reduces the possibility of leakage. This type of butterfly valve is suitable for high pressure and high temperature environments because the welded connection provides high strength and sealing performance. Since there are no connecting bolts or clamps, welded butterfly valves can be installed in tight spaces, reducing the overall size of the valve.

Clamp type butterfly valve adopts clamp connection to fix the valve body and pipeline. It uses bolts and nuts to clamp the two bodies together, creating a tight connection. The clamp type butterfly valve has the convenience of disassembly and maintenance, because it can disassemble the valve body and pipe by loosening the bolts and nuts. This type of butterfly valve is suitable for low pressure and normal temperature applications, such as water supply systems and air conditioning systems.

Next, this article compares and analyzes these two sanitary butterfly valves from three aspects:

1. Structural design:

Welded butterfly valve: The main feature of the welded butterfly valve is that the valve body and the pipe are welded together to form a whole. Valve bodies are usually made of cast iron, stainless steel or carbon steel. The welded butterfly valve has a better seal and no obvious leak points because there are no additional connecting parts.

Clamp type butterfly valve: The structure of the clamp type butterfly valve is different from that of the welded type. It has a valve body and two clamps, and the valve body and clamps are fixed on the pipeline by bolts. Body material can also be cast iron, stainless steel or carbon steel.

2. Installation and maintenance:

Welded butterfly valve: Since the welded butterfly valve is welded with the pipeline, it is relatively difficult to install and requires professional welding skills. For maintenance, the entire valve body needs to be disassembled for overhaul or replacement, which may require more time and manpower.

Clamp-type butterfly valve: In contrast, the installation of the clamp-type butterfly valve is easier and does not require welding. It only needs to fix the valve body and the clamp on the pipeline through bolts. During maintenance, the clamp and valve body can be easily disassembled, and the sealing ring or other parts can be replaced.

3. Sealing:

Welded butterfly valve: Since the welded butterfly valve has no additional connecting parts, its sealing performance is better and the risk of leakage is lower.

Clamp butterfly valve: The sealing performance of the clamp butterfly valve depends on the quality and tightness of the clamp. Leakage may result if the bolts are not tightened properly or the material of the clamps is not acceptable.

Scope of application:

Welded butterfly valve: Due to its compact structure, it is suitable for some occasions that require high sealing performance and large flow, such as petroleum, chemical and other industrial fields.

Clamp type butterfly valve: Due to its convenient installation and maintenance, it is suitable for some general industrial occasions, such as water supply and drainage, air conditioning systems, etc.