Principles and characteristics of stainless steel flange butterfly valves. What are the price advantages of stainless steel butterfly valves?

Principle of stainless steel flange butterfly valve:

Stainless steel flange butterfly valve, also known as stainless steel flap valve, mainly adopts a three-eccentric multi-layer metal hard seal structure. It is widely used in metallurgy, petrochemical, electricity, drainage, and some municipal construction industrial pipelines with medium temperatures below 425 degrees to regulate flow and cut off fluids. In addition, stainless steel flange butterfly valves also have good corrosion resistance, so their service life is also very long. Here I will introduce the principles, advantages and disadvantages of stainless steel flange butterfly valves, hoping to help you.

1. Principle of stainless steel flange butterfly valve

The opening and closing part of the butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to open, close or adjust the valve. The stroke of the butterfly valve from full open to full closed is usually less than 900. The butterfly valve and the butterfly stem themselves do not have self-locking force. In order to position the butterfly plate, a worm gear reducer must be installed on the valve stem. The use of a worm gear reducer not only makes the butterfly plate self-locking, so that the butterfly plate can stop at any position, but also improves the operating performance of the valve. The characteristics of industrial butterfly valves are high temperature resistance, high applicable pressure range, large nominal diameter, the valve body is made of carbon steel, and the valve plate sealing ring uses a metal ring instead of a rubber ring. Large high-temperature butterfly valves are made of steel plate welding and are mainly used in flues and gas pipelines with high-temperature media.

2. Advantages and disadvantages of stainless steel flange butterfly valve

(1) Advantages:

1. It is convenient, quick, labor-saving to open and close, with small fluid resistance, and can be operated frequently.

2. Simple structure, small size and light weight.

3. It can transport mud with very little liquid accumulation at the pipe mouth.

4. Good sealing can be achieved under low pressure.

5. Good adjustment performance.

(2) Disadvantages:

1. The working pressure and working temperature range are small.

2. Poor sealing. Butterfly valves can be divided into offset plate type, vertical plate type, inclined plate type and lever type according to their structural form.

3. Characteristics and methods of stainless steel flange butterfly valve

1. Features

The butterfly valve has the characteristics of simple structure, small size, light weight, low material consumption, small installation size, fast switching, 90-degree reciprocating rotation, and small driving torque. It is used to cut off, connect, and adjust the medium in the pipeline, and has good fluid control characteristics and cutting and sealing performance.

2. How to use

Connection method: flange, thread or welding.

Driving mode: manual, electric, pneumatic, bevel gear, spur gear rotation.

Applicable media: water, oil, gas, steam, etc.