Double Flange Butterfly Valve

Features:

1. Small in size, light in weight, easy installation and maintenance.

2. Simple and compact construction, quick 90 degree on-off operation.

3. Minimized operating torque, energy saving.

4. Flow curve tending to straight line, excellent regulation performance.

5. Long service life, standing the test of tens thousands opening/closing operations.

6. Wide selection of materials, applicable to various medium.

Performance:

Standard:

Material List:

 butterfly valve flange type

Equipment used in industries such as water supply and drainage, metallurgy, energy systems, and light textiles with 

temperatures ≤120°C or ≤150°C and nominal pressures ≤1.6MPa.

The butterfly valve has a simple structure, small size and light weight, and is composed of only a few parts. Moreover, it only needs to be rotated 90° to quickly open and close, which is simple to operate. At the same time, the valve has good fluid control characteristics. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipe. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0° and 90°. When it rotates to 90°, the valve is fully open. When the flange butterfly valve is in the fully open position, the thickness of the butterfly plate is the resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has good flow control characteristics. Butterfly valves have two sealing types: elastic seal and metal seal. For elastic sealing valves, the sealing ring can be embedded in the valve body or attached to the periphery of the butterfly plate.

Introduction

The rotation center of the butterfly plate (that is, the center of the valve stem) is located on the center line of the valve body and the sealing surface section of the butterfly plate. The valve seat is made of synthetic rubber. When closing, the outer circular sealing surface of the butterfly plate squeezes the synthetic rubber valve seat, causing the valve seat to elastically deform, thereby forming elastic force as the sealing specific pressure to ensure the sealing of the butterfly valve. The sealing structure of the flange butterfly valve uses polytetrafluoroethylene and synthetic rubber to form a composite valve seat. Its characteristic is that the elasticity of the valve is still provided by synthetic rubber and it uses the characteristics of polytetrafluoroethylene such as low friction coefficient, not easy to wear, not easy to age, etc., so that The life of the butterfly valve is improved.

The sealing principle and structural characteristics of the flange butterfly valve are the same as those of the ordinary centerline butterfly valve.

The sealing structure of the flange butterfly valve uses polytetrafluoroethylene, synthetic rubber and phenolic resin to form a composite valve seat, which makes the valve seat elastic and stronger at the same time. At the same time, the butterfly plate is fully covered with polytetrafluoroethylene, so that the butterfly plate has strong corrosion resistance.

The main features of flange butterfly valve are:

1. Small and lightweight, easy to disassemble and repair, and can be installed at any location.

2. The structure is simple and compact, the operating torque is small, and the 90° rotation opens quickly.

3. The flow characteristics tend to be linear and the adjustment performance is good.

4. The connection between the butterfly plate and the valve stem adopts a pinless structure, which overcomes possible internal leakage points.

5. The outer circle of the butterfly plate adopts a spherical shape, which improves the sealing performance and extends the service life of the valve. It can maintain zero leakage for more than 50,000 times of opening and closing under pressure.

6. The seals are replaceable and the sealing is reliable and achieves two-way sealing.

7. The butterfly plate can be spray-coated according to user requirements, such as nylon or polytetrafluoroethylene.

8. The valve can be designed with flange connection and wafer connection.

9. The driving mode can be manual, electric or pneumatic.

Flange butterfly valves are suitable for industries such as water supply and drainage, sewage, food, heating, gas, ships, hydropower, metallurgy, energy systems, and textiles with temperatures ≤120°C or ≤150°C and nominal pressures ≤1.6MPa. They are especially suitable for two-way sealing and In situations where the valve body is prone to rust, it is used as a flow regulating and intercepting medium.