A Ball Valve is a valve whose opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. It can also be used for fluid regulation and control. The hard-sealed V-type ball valve has a strong shear force between its V-type ball core and the metal valve seat welded with hard alloy, which is particularly suitable for media containing fibers, tiny 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 should generally 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.
Ball Valve Introduction
The ball valve has a 90-degree rotation action, and the sealing body is a sphere with a circular through hole or channel passing through its axis.
The ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium. It only needs to rotate 90 degrees and a very small torque to close tightly. The ball valve is most suitable for use as a switch and cut-off valve, V-type ball valve.
What are the Categories of Ball Valves
Function classification
- Bypass valve: ball valves are generally opened by static water, so bypass valves are set to level pressure first, that is, both sides are filled with water;
- Air valve: when filling with water, the air is removed and the float closes the valve automatically; when draining, air is added and the float drops automatically;
- Pressure relief valve: when opening and closing the valve, the pressure water between the valve and the sealing cover is removed to avoid wearing the sealing cover;
- Drain valve: drain the sewage from the lower part of the ball shell.
Drive mode classification
- Pneumatic ball valve
- Electric ball valve
- Hydraulic ball valve
- Pneumatic and hydraulic ball valve
- Electro-hydraulic ball valve
- Gear box ball valve
Classification by body material
- Metal material valves: such as carbon steel valves, alloy steel valves, stainless steel valves, cast iron valves, titanium alloy valves, monel valves, copper alloy valves, aluminum alloy valves, lead alloy valves, etc.
- Metal valve body lined valves: such as rubber lined valves, fluorine lined valves, lead lined valves, plastic lined valves, enamel lined valves.
- Non-metallic material valves: such as ceramic valves, glass valves, plastic valves.
Other characteristics classification
Ball valves are divided into: floating ball valves, trunnion mounted ball valves, track ball valves, V-type ball valves, three-way ball valves, stainless steel ball valves, cast steel ball valves, forged steel ball valves, ash unloading ball valves, sulfur-resistant ball valves, pneumatic ball valves, electric ball valves, ferrule ball valves, and welded ball valves.
Ball Valve Product Features
- The fluid resistance is small, and its resistance coefficient is equal to that of the pipe section of the same length.
- Simple structure, small size, and light weight.
- Tight and reliable, and the sealing surface material of the ball valve widely uses plastic, good sealing, and has been widely used in vacuum systems.
- Easy to operate, quick opening and closing, just rotate 90° from full open to full closed, convenient for long-distance control.
- Easy to maintain, the ball valve has a simple structure, the sealing ring is generally movable, and it is convenient to disassemble and replace.
- Wide range of applications, diameters range from a few millimeters to several meters, and can be used for high vacuum or high pressure.
This type of valve is a commonly used high-pressure ball valve in existing mines. It withstands high pressure and adopts a U-shaped card quick connection method. It can be quickly installed and disassembled in daily production and use in mines, and is easy to use.
Technical Parameter of Ball Valve
- Nominal pressure or pressure level: PN1.0-32.0MPa, ANSI CLASS 150-900, JIS10-20K;
- Nominal diameter or caliber: DN6~900, NPS 1/4~36;
- Connection method: flange, butt welding, thread, socket welding, etc.;
- Applicable temperature: -196℃~540℃;
- Drive mode: manual, worm gear transmission, pneumatic, electric, hydraulic, gas-liquid linkage, electro-hydraulic linkage;
- Valve body material: WCB, CF8(304), CF3(304L), CF8M(316), CF3M (316L), Ti. Different materials can be used for water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and other media.
Application of Ball Valve
Ball valves are widely used in petroleum, chemical industry, electric power, environmental protection, water conservancy, heating, water supply and drainage, industry and machinery. Due to its simple structure, convenient operation and small fluid resistance, ball valves play an important role in these industries.