Ball Valves
Introduction:
Ball valve, a valve whose opening and closing parts (ball) are driven by the valve stem and rotate around the ball valve axis. It can also be used for fluid regulation and control. The hard sealed V-ball valve has a strong shear force between its V-ball core and the metal valve seat of hardfacing carbide, which is especially suitable for media containing fibers, small solid particles, etc. The multi way ball valve can not only flexibly control the confluence, diversion and flow direction switching of the medium on the pipeline, but also close any channel to connect the other two channels. This type of valve shall be installed horizontally in the pipeline. Ball valves are divided into pneumatic ball valves, electric ball valves and manual ball valves according to the driving mode.
Advantage:
1. The fluid resistance is small, and its resistance coefficient is equal to that of pipe sections of the same length.
2. Simple structure, small volume and light weight.
3. It is tight and reliable, and the sealing surface material of the ball valve is widely made of plastic with good sealing performance. It has also been widely used in the vacuum system.
4. It is easy to operate and can be opened and closed quickly. Only 90 ° rotation is required from full opening to full closing, which is convenient for remote control.
5. It is easy to maintain, the ball valve is simple in structure, the sealing ring is generally movable, and it is convenient to disassemble and replace.
6. It has a wide range of applications, ranging from a few millimeters to several meters in diameter, and can be applied to high vacuum or high pressure.
Functional classification:
1. Bypass valve: the ball valve is generally opened in still water, so the bypass valve is set to level pressure first, that is, both sides are filled with water;
2. Air valve: when filling water, the float will automatically close the valve after removing air; During drainage, air shall be supplemented and the pontoon shall descend automatically;
3. Pressure relief valve: when opening and closing the valve, drain the pressure water between the valve and the sealing cover to avoid wearing the sealing cover;
4. Blowdown valve: discharge the sewage from the lower part of the spherical shell.
Transmission classification:
1. Pneumatic ball valve
2. Electric ball valve
3. Hydraulic ball valve
4. Pneumatic and hydraulic ball valve
5. Electro hydraulic ball valve
6. Turbine driven ball valve
Classification characteristics:
Valve Floating Ball Valve
Valve Floating Ball Valve
Ball valves include: floating ball valve, fixed ball valve, rail ball valve, V-shaped ball valve, three-way ball valve, stainless steel ball valve, cast steel ball valve, forged steel ball valve, ash discharge ball valve, sulfur resistant ball valve, pneumatic ball valve, electric ball valve, ferrule ball valve and welding ball valve.
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