3 Piece Ball Valve Working Principle, Advantages And Classification

3 Piece Ball Valve Working Principle
A ball valve achieves a tight closure with only a 90-degree rotation and minimal torque. The flat inner cavity of the valve body provides a low-resistance, straight-through flow path for the medium. Ball valves are characterized by their compact structure and ease of operation and maintenance. They can be used to control the flow of various fluids, including air, water, steam, various corrosive media, slurries, oils, liquid metals, and radioactive media. Ball valve bodies can be either integral or modular. This type of valve should generally be installed horizontally in pipelines. Available categories include: stainless steel pneumatic ball valves, stainless steel electric ball valves, and stainless steel manual ball valves. Materials include 304, 316, and 32 3 Piece Ball Valve.
The ball valve operates by rotating the valve core to open or close the valve. Ball valves are lightweight, compact, and can be manufactured in large diameters. They offer reliable sealing, a simple structure, and easy maintenance. The sealing surface and spherical surface are always in a closed position, making them less susceptible to erosion by the medium. They are widely used in various industries.

Ball valves and plug valves are similar valves, except that the closing member is a sphere that rotates around the centerline of the valve body to open and close. 
3 Piece Ball Valve are primarily used in pipelines to cut off, distribute, and change the flow direction of media. They are a widely adopted new type of valve.

Advantages

1. Low fluid resistance; the resistance coefficient is equivalent to that of a pipe section of the same length.

2. Simple structure, compact size, and light weight.

3. Tight and reliable. Ball valves are widely used in vacuum systems, with plastic being the preferred sealing surface material.

4. Easy to operate and quick to open and close. A 90° rotation from fully open to fully closed facilitates remote control.

5. Ball valves are easy to maintain, with a simple structure and removable sealing rings, making them easy to disassemble and replace.
6. When fully open or fully closed, the sealing surfaces between the ball and valve seat are isolated from the media, preventing erosion of the valve sealing surfaces when the media passes through.
7. They have a wide range of applications, with diameters ranging from a few millimeters to several meters, and can be used in applications from high vacuum to high pressure.
Ball valves are widely used in various sectors, including the petroleum, chemical, power generation, papermaking, atomic energy, aviation, and rocketry, as well as in daily life.
Ball valves are divided into O-type and V-type. O-type ball valves use a floating structure, with a precision casting core and a hard chrome-plated exterior. The valve seat is made of reinforced polytetrafluoroethylene. The flow channel is the same diameter as the pipe, resulting in high flow capacity, minimal flow resistance, and no leakage when closed. They are generally used as on-off valves and are particularly suitable for high-viscosity, fibrous, and granular media. V-type ball valves use a fixed structure with a V-shaped cutout in the ball core, enabling proportional adjustment and a flow characteristic that approximates equal percentages. Depending on the process equipment, pneumatic or electric actuation can be selected, forming pneumatic and electric ball valves, respectively. Pneumatic ball valves require a valve positioner for proportional control, while electric ball valves require an electronic actuator or servo amplifier.

Based on material, ball valves can be categorized as carbon steel, 304 stainless steel, 316 stainless steel, and copper.

Based on application, ball valves can be categorized as high-pressure or low-pressure.

High-pressure ball valves are primarily used in the oil, natural gas, hydraulic oil, and construction machinery industries.

Low-pressure ball valves are primarily used in pipelines with non-corrosive media such as water.