Products Description
The wafer butterfly valve is one of the commonly used butterfly valves. It is named because of its structural form in which the valve stem axis, the center of the butterfly plate, and the center of the body are in the same position. The structure of the wafer butterfly valve is very simple and it is also easy to install and maintain. As a component that controls the on-off and flow rate of the pipeline system, the wafer butterfly valve is widely used in pipeline systems in the fields of petroleum, chemical industry, hydropower stations, municipal construction, water supply and drainage, etc.
The sealing form of the wafer butterfly valve is generally a soft seal, and the sealing materials are rubber or polytetrafluoroethylene, so the wafer butterfly valve is usually a soft seal butterfly valve. The advantage of this type of valve is that the seal can be replaced, the sealing performance is excellent and reliable, zero leakage can be achieved, and two-way sealing can be achieved. However, due to the limitations of its own structural characteristics, the wafer butterfly valve also has some disadvantages. Since the butterfly plate and the valve seat of the valve are always in a state of extrusion and scraping, the resistance distance is large, and the wear on the butterfly plate and the valve seat is very large, in order to overcome the extrusion and scraping phenomenon and ensure the sealing performance of the valve, the valve seat of the wafer butterfly valve adopts elastic materials such as rubber or polytetrafluoroethylene to ensure the sealing performance of the valve. However, materials such as rubber and polytetrafluoroethylene are subject to temperature restrictions in use, so the disadvantage of the wafer butterfly valve is that it is not resistant to high temperatures.
The wafer butterfly valve is not suitable for high temperature and high pressure working environments, has poor wear resistance and a short service life. These shortcomings limit the application scope of the valve. In order to overcome this problem, there is now a three-eccentric metal hard seal wafer butterfly valve. The valve stem axis of the three-eccentric metal hard seal wafer butterfly valve deviates from the center of the butterfly plate and the center of the body at the same time, and the valve seat rotation axis and the valve body channel axis have a certain angle. The three-eccentric butterfly valve is more resistant to high temperatures, and also has good sealing performance and a longer service life.
Product Features
Features of soft-sealed disc butterfly valve:
● The wafer butterfly valve is small and light, easy to disassemble and repair, and can be installed at any position.
● The structure is simple and compact, and the 90° operation can be opened and closed quickly.
●The operating torque is small, labor-saving and light.
● Achieve complete sealing and zero gas test leakage.
● Choose different parts materials, which can be applied to a variety of media.
● The flow characteristics tend to be flat and the adjustment performance is good.
●The number of opening and closing tests is as high as tens of thousands of times, and the service life is long.
● It can replace various valves such as gate valves, stop valves, plug valves, hose valves, diaphragm valves, etc.
Product features of hard seal wafer butterfly valve:
Since the wafer butterfly valve is designed with the three-dimensional eccentric principle, the spatial motion trajectory of the sealing surface is ideal. There is no friction and interference between the sealing surfaces, and the sealing material is properly selected, so the butterfly valve is sealed and corrosion-resistant. Performance, high temperature resistance and wear resistance are reliably guaranteed. Its main features are as follows:
●The opening torque of the wafer butterfly valve is small, flexible and convenient, labor-saving and energy-saving.
● The three-dimensional braided core structure makes the butterfly plate tighter and tighter, and its sealing performance is reliable, achieving no leakage.
●The wafer butterfly valve is resistant to high pressure, corrosion, wear and long service life.
●The specifications of the wafer and flange flanges are the same, but the flange bolts of the wafer butterfly valve are longer, with a length of "flange thickness + valve thickness + 2 times the thickness of the nut", and the right clamp valve itself cannot be flanged; as long as the bolts and nuts are removed, the pipes at both ends of the valve will not work properly. The flange bolts are relatively short, with a length of "2 times the thickness of the flange + 2 times the thickness of the nut", that is, the valve body flange matches the flange on the pipeline, connected by bolts, and locked with nuts; when the flange is at one end, the bolts and nuts are removed without affecting the normal operation of the other end of the pipeline.
Product Specification
| Diameter Specifications | DN50~DN1200 |
| Structural form | Wafer type (center line type, three-way type) |
| Valve body material | Ductile iron, WCB cast steel, 304, 316 stainless steel |
| Nominal pressure | PN6、PN10、PN16、PN25 |
| Applicable temperature | -40℃~450℃ |
| Application | Sewage, water, steam, oil, corrosive media |
| Features | The valve body is small and the structure is simple, which can be used in the working conditions of narrow space and short pipeline distance. |
Product Dimensions
Product Features
Features of soft-sealed disc butterfly valve:
● The wafer butterfly valve is small and light, easy to disassemble and repair, and can be installed at any position.
● The structure is simple and compact, and the 90° operation can be opened and closed quickly.
●The operating torque is small, labor-saving and light.
● Achieve complete sealing and zero gas test leakage.
● Choose different parts materials, which can be applied to a variety of media.
● The flow characteristics tend to be flat and the adjustment performance is good.
●The number of opening and closing tests is as high as tens of thousands of times, and the service life is long.
● It can replace various valves such as gate valves, stop valves, plug valves, hose valves, diaphragm valves, etc.
Product features of hard seal wafer butterfly valve:
Since the wafer butterfly valve is designed with the three-dimensional eccentric principle, the spatial motion trajectory of the sealing surface is ideal. There is no friction and interference between the sealing surfaces, and the sealing material is properly selected, so the butterfly valve is sealed and corrosion-resistant. Performance, high temperature resistance and wear resistance are reliably guaranteed. Its main features are as follows:
●The opening torque of the wafer butterfly valve is small, flexible and convenient, labor-saving and energy-saving.
● The three-dimensional braided core structure makes the butterfly plate tighter and tighter, and its sealing performance is reliable, achieving no leakage.
●The wafer butterfly valve is resistant to high pressure, corrosion, wear and long service life.
●The specifications of the wafer and flange flanges are the same, but the flange bolts of the wafer butterfly valve are longer, with a length of "flange thickness + valve thickness + 2 times the thickness of the nut", and the right clamp valve itself cannot be flanged; as long as the bolts and nuts are removed, the pipes at both ends of the valve will not work properly. The flange bolts are relatively short, with a length of "2 times the thickness of the flange + 2 times the thickness of the nut", that is, the valve body flange matches the flange on the pipeline, connected by bolts, and locked with nuts; when the flange is at one end, the bolts and nuts are removed without affecting the normal operation of the other end of the pipeline.
Product Dimensions
Product Specification
| Diameter Specifications | DN50~DN1200 |
| Structural form | Wafer type (center line type, three-way type) |
| Valve body material | Ductile iron, WCB cast steel, 304, 316 stainless steel |
| Nominal pressure | PN6、PN10、PN16、PN25 |
| Applicable temperature | -40℃~450℃ |
| Application | Sewage, water, steam, oil, corrosive media |
| Features | The valve body is small and the structure is simple, which can be used in the working conditions of narrow space and short pipeline distance. |
