Soft Seal Butterfly Valve Instruction
Concept about soft seal butterfly valves.
The soft seal butterfly valve, as a component used to achieve pipeline system cutoff and flow control, has been extremely widely applied in many fields such as petroleum, chemical engineering, metallurgy, hydropower, etc. The butterfly disc of the soft seal butterfly valve is installed in the diameter direction of the pipeline. Inside the cylindrical channel of the butterfly valve body, the disc-shaped butterfly disc rotates around the axis, with the rotation angle between 0° and 90°. When it rotates to 90°, the valve is in the fully open state.
Structure characteristics of the soft seal butterfly valves.
- 1. The soft seal butterfly valve opens and closes quickly;
- 2. Soft seal butterfly valve adopts advanced double eccentric seal structure, which has low friction and good sealing performance;
- 3. The soft seal butterfly valve sealing ring is precisely matched with the valve body, effectively avoiding the washing of the medium, and improving the service life and sealing effect;
- 4. The material of the soft seal butterfly valve plate seal ring is high-quality rubber, and the seal ring has good anti-aging, anti-wear and long service life;
- 5. The valve switch limit device of the soft seal butterfly valve is reliable, there is no over-open or over-close phenomenon, and the switch indication is consistent with the actual position of the plate.
- 6. The valve body, disc and stem of the soft seal butterfly valve have sufficient strength and rigidity. After the disc seal is installed, it can be adjusted and replaced inside the valve body.
Soft seal butterfly valve implementation standard.
- Design and manufacturing standard: GB / T 12238
- Standard length of valve structure: GB / T 12221
- Connecting flange standards: GB / T9113.1, GB / T17241.6
- Inspection and test standard: GB / T 13927
Main features of the soft seal butterfly valve.
First, in terms of valve body structure, it generally adopts an integral structure, formed by integral casting, which features high strength and good sealing performance. The internal flow channel of the valve body is designed to be simple and smooth, capable of reducing fluid resistance and improving fluid passing capacity, especially suitable for flow control in large-diameter pipelines.
Second, the valve disc of the soft seal butterfly valve typically adopts a disc-shaped structure, which is connected to the valve body through a rotating shaft. The sealing surface of the valve disc is made of soft materials such as rubber and polytetrafluoroethylene. These soft sealing materials have good elasticity and wear resistance, enabling them to closely fit the sealing surface of the valve body and ensure the sealing performance of the valve in the closed state. Moreover, when the soft sealing materials come into contact with the medium, no friction or wear will occur, reducing the leakage rate of the valve and improving its service life.
Furthermore, soft seal butterfly valves can be equipped with various driving methods, such as manual, electric, pneumatic, etc. The manual drive has a simple structure and is easy to operate, suitable for use in some small-scale occasions or emergency situations; electric and pneumatic drives can realize remote control and automated operation, improving the control precision and work efficiency of the valve.
In addition,the soft seal butterfly valve is convenient to install. The valve body is usually provided with standard flange connection interfaces or wafer-type connection structures, which can be quickly connected to various pipeline systems. At the same time, the maintenance of the valve is relatively simple—just regularly check the wear condition of the sealing materials and replace them in a timely manner if necessary.
