Find double flange butterfly valve of high quality from China here

Oct 16, 2023 | News

Flange is a pipe and pipe interconnection parts, used for the connection between the end of the pipe, where in the two planes around the perimeter of the use of bolted connections at the same time closed connection parts, generally known as “flange”. Therefore, flange is also an important part of butterfly valve.

Flange butterfly valve design structure is novel, the overall size is small, light weight; flange butterfly valve butterfly plate adopts double eccentric, open and close quickly, easy to operate and save energy.

Double flange butterfly valve is a kind of control valve widely used in pipelines. It consists of two flange connections in which a rotatable butterfly valve is installed. The main function of the double flange connection butterfly valve is to control the fluid in the pipeline and keep it flowing steadily within a certain range.

Main features of flange butterfly valve

Stainless steel butterfly valves

  • Small and lightweight, easy to disassemble and maintenance, and can be installed in any position.
  • Simple and compact structure, small operating torque, 90 ° turn to open quickly.
  • Flow characteristics tend to straight line, good regulation performance.
  • The connection between butterfly plate and valve stem adopts pinless structure, which overcomes the possible internal leakage point.
  • The butterfly plate outer circle adopts spherical modelling, improve the sealing performance and extend the service life of the valve, with pressure opening and closing more than 50,000 times still maintain zero leakage.
  • The sealing member can be replaced, and the sealing is reliable to achieve two-way sealing.

Comparative advantages of double flange butterfly valve 

  • Space-saving: compared with other types of valves, double flange connection butterfly valve is small in size and compact in structure, which can save pipeline space and facilitate maintenance.
  • Strong corrosion resistance: double flanged butterfly valve is made of stainless steel, carbon steel and other high-quality materials, the valve has good sealing, strong corrosion resistance and long service life.
  • Easy to operate: double flange connection butterfly valve can be manually, pneumatically, electrically and other ways to achieve switch control, easy to operate, convenient.
  • Small starting power: double flange connection butterfly valve requires small starting power in the start-up process, which can be controlled manually or electrically.
  • Wide applicability: double flange connection butterfly valve is suitable for water, gas, liquid and other media pipeline, involving a wide range of industries.

Application of double flange butterfly valve

Double flange butterfly valve is widely used in chemical, water treatment, heating, air conditioning, petroleum, electric power and other industries. In these industries, double flanged butterfly valves mainly play the role of switching, regulating, flow control and so on.

Among them, double flange butterfly valves are more and more widely used in the water treatment industry. In the field of sewage treatment, water treatment and other fields, double flange butterfly valves are widely used in flow control, pressure control and other aspects.

Double flange butterfly valves are also divided into different materials and sizes, which TWT,China will introduce to you buyers next.

How to select double flange butterfly valve

When buying double flange butterfly valve, TWT,China advise buyers to consider the following aspects:

  1. Select different materials according to different use environments. For example, double flange butterfly valves used in strong acid and alkali environments need to choose materials with good corrosion resistance.
  2. According to the actual need to choose the appropriate specifications and models. Different specifications and models of double flange butterfly valve can withstand different pressure, flow and other parameters.
  3. Pay attention to the working conditions of double flange butterfly valve. For example, temperature, pressure, medium and other aspects need special attention to avoid failure caused by the use of the environment does not meet the requirements.

Common material and applicable condition of double flange butterfly valve

Grey cast iron:

Applicable pressure : ≤1.6Mpa

Applicable temperature : -15~200℃

Applicable medium:  water/air/gas etc.

Ductile cast iron:

Applicable pressure : ≤4.0Mpa

Applicable temperature : -30~350℃

Applicable medium : Water/seawater/steam/air/gas

Carbon steel:

Applicable pressure:  ≤32.0Mpa

Applicable temperature:  -29~425℃

Applicable medium: Non-corrosive applications, including water, oil and vapour

Alloy steel :

Applicable temperature: High pressure -30~593℃

Applicable medium: Non-corrosive applications, including water, oil and vapour

Stainless steel

Applicable temperature: -268~649℃

Applicable medium: Corrosive media / ultra-low temperature / high temperature corrosion-free

Copper alloy

Applicable temperature: -15~200℃

Applicable medium: Oxygen/seawater

Why we recommend China double flange butterfly valve?

China, as a major infrastructure country and a rising star in industrialisation, has become quite sophisticated in the manufacture of butterfly valves.In addition to experience and knowledge, China has better-qualified workers, strict production standards, and competitive prices. As a leading butterfly valve manufacturer in China, we TWT are more confident to win in quality and service provider.

If you need not only a supplier, but also purchasing guidance and instruction in its use, choose TWT and you will not be disappointed.