Knowledge

Ball valve features



The ball valve is a ball with a circular through hole as the opening and closing pieces, the valve stem driven by 90 degrees around the center of the stem rotation, complete opening and closing function. According to the structure of the ball valve, there are mainly two types of floating ball valve and fixed ball valve. According to the material of the ball valve, there are mainly two kinds of cast steel ball valve and forged steel ball valve. According to the characteristics of ball valve sealing surface, there are mainly soft sealing ball valve and metal hard sealing Ball valve two; According to the ball valve body structure, there are three main types of ball valve, ball valve and all-welded ball valve three. The ball valve is used to cut off or connect the medium in the pipeline. It is widely used in petroleum refining, long-distance pipeline, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, steel and other fields, especially in the fields of petroleum, natural gas, As well as the widespread use of oil refining unit. Its strength, safety, resistance to harsh environments and other special considerations in the design, suitable for a variety of corrosive and non-corrosive media. Selection of different materials, can be applied to transport water, steam, oil, natural gas, nitric acid, acetic acid, oxidizing media, urea and so on. Ball valve structure is compact, reliable seal, the sealing surface and the spherical surface is often closed, easy to be media erosion, easy to operate and maintain.

Structural features

1, the ball valve in the fully open and fully closed, the sealing surface of the ball and seat isolation and media, so the high speed through the valve medium will not cause erosion of the sealing surface;

2, the ball valve structure is simple, good sealing, opening and closing torque is small;

3, with ** flow resistance (actually close to zero);

4, reduced diameter or full diameter

5, the flange face or butt welding face;

6, soft seal ball valve has a fire prevention and anti-static device;

7, the stem for the anti-spray design, to prevent improper operation caused by the valve stem ejected from the body;

8, can support a variety of drive connection plate. The driving device includes a handle, a worm gear, an electric motor, a pneumatic motor, an air-liquid motor, an electro-hydraulic motor,

9, easy to adjust the position. When replacing or installing the actuator online, the position of the ball hole can not be seen clearly. The BTL ball valve provides a special "positioning groove", which makes it easy and accurate to find the ball valve fully open and fully closed. Convenient adjustment of actuator limit device;

10, for the end of the valve for the welding connection, according to user pipe material level response to adjust the valve end of the material (transition), to ensure that the material strength of the adaptability and weldability. Both ends of the sleeve valve, the length of the sleeve tube to ensure on-site welding operation does not affect the sealing material;

11, buried design. Buried valves and levers shall be extended according to the requirements of the project so as to operate on the ground and extend the corresponding grease injecting, blowdown and venting devices from the pipe to the ground.