A valve is a mechanical device that controls the flow, flow direction, pressure, temperature, etc. of a flowing fluid medium, and a valve is a basic component in a piping system. Valve fittings are technically the same as pumps and are often discussed as a separate category. So what are the types of valves? Let’s find out together.
At present, the most commonly used valve classification methods internationally and domestically are as follows:
1. According to the structural features, according to the direction in which the closing member moves relative to the valve seat, it can be divided into:
1. Cut-off shape: the closing part moves along the center of the valve seat.
2. Gate shape: the closing member moves along the center of the vertical seat.
3. Cock and ball: The closing member is a plunger or a ball that rotates around its own centerline.
4. Swing shape; the closing member rotates around the axis outside the valve seat.
5. Disk shape: the disc of the closing member rotates around the axis in the valve seat.
6. Slide valve shape: the closing member slides in the direction perpendicular to the channel.
2. According to the driving method, it can be divided according to different driving methods:
1. Electric: driven by motor or other electrical devices.
2. Hydraulic power: driven by (water, oil).
3. Pneumatic: use compressed air to drive the valve to open and close.
4. Manual: With the help of handwheels, handles, levers or sprockets, etc., it is driven by manpower. When transmitting large torque, it is equipped with reduction devices such as worm gears and gears.
3. According to the purpose, according to the different uses of the valve, it can be divided into:
1. For breaking: used to connect or cut off the pipeline medium, such as globe valve, gate valve, ball valve, butterfly valve, etc.
2. For non-return: used to prevent backflow of medium, such as check valve.
3. For adjustment: used to adjust the pressure and flow of the medium, such as regulating valves and pressure reducing valves.
4. For distribution: used to change the flow direction of the medium and distribute the medium, such as three-way cocks, distribution valves, slide valves, etc.
5. Safety valve: When the pressure of the medium exceeds the specified value, it is used to discharge excess medium to ensure the safety of the pipeline system and equipment, such as safety valve and emergency valve.
6. Other special purposes: such as steam traps, vent valves, sewage valves, etc.
Post time: Feb-17-2023