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Pneumatic ball valve
The release date：[2020-08-05] hits
The ball valve USES the ball with the round through hole as the opening and closing part. The ball rotates around the center of the valve stem for 90 degrees under the drive of the valve stem to complete the opening and closing function.
According to the structure of the ball valve, there are mainly floating ball valve and fixed ball valve;
According to the ball valve material composition, there are mainly cast steel ball valve, forged steel ball valve two;
According to the characteristics of the sealing surface of the ball valve, there are mainly two kinds of soft sealing ball valve and metal hard sealing ball valve;
According to the body structure of the ball valve, there are mainly three kinds of split ball valve, mounted ball valve and fully welded ball valve.
The ball valve is used to cut off or connect the medium in the pipeline, widely used in petroleum refining, long transport pipeline, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal, steel and other fields, especially in petroleum, natural gas, national reserve oil depot and refinery cracking unit.
Its strength, safety, resistance to harsh environment and other special considerations in the design, suitable for a variety of corrosive and non-corrosive media.
Different materials can be used to transport water, steam, oil, natural gas, nitric acid, acetic acid, oxidizing medium, urea, etc.
Ball valve structure is compact, reliable sealing, sealing surface and spherical often in the closed state, not easy to be eroded by the medium, easy to operate and maintain.
Structural characteristics of
1, ball valve in full open and full close, the ball and valve seat sealing surface and medium isolation, so high speed through the valve medium will not cause sealing surface erosion;
2, ball valve simple structure, good sealing, small opening and closing torque;
3. It has the lowest flow resistance (practically close to zero);
4. Reduced diameter or full diameter;
5. Flange end face or butt welding end face;
6, soft sealing ball valves are equipped with fire and anti-static devices;
7. The stem is designed to prevent blowout from the valve body due to improper operation;
8, can support a variety of driving device connection disk.
The driving device includes handle, worm wheel, electric, pneumatic, gas-liquid linkage, electro-hydraulic linkage, etc.
9. Convenient position adjustment.
The BTL ball valve provides a special "positioning slot" so that it is very easy and accurate to find the full open and closed position of the ball valve.
To facilitate the adjustment of the actuator limit device;
10. For the welded end valve, the valve end material (ITD) can be adjusted according to the user's pipe material class response to ensure the suitability and weldability of the material strength.
For the valve with sleeve at both ends, the length of the sleeve can ensure that the field welding operation does not affect the sealing material;
11. Burial design.
For valves installed underground, the stem shall be extended as required by the project for ground operation, and the corresponding grease, drain and vent devices shall be extended from the pipe to the ground.
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