Gate valve: There is a flat plate in the valve body perpendicular to the flow direction of the medium, which can be activated and closed by lifting.
Features: Good air tightness, small fluid resistance, small opening and closing force, wide application range, fixed flow regulation performance, and generally suitable for large-diameter official roads.
Ball valve: The ball with a hole in the middle is used as the valve core, and the rotating ball is used to control the activation and closing of the valve.
Features: Compared with the gate valve, the structure is simpler, the volume is smaller, and the fluid resistance is smaller, which can replace the function of the gate valve.
Butterfly valve: The opening and closing part is a disc-shaped valve that rotates around a fixed axis in the valve body.
Features: Simple structure, small size, light weight, suitable for manufacturing valves with larger diameters. Because there are still problems with the sealing structure and materials, it is only used for low pressure, water, air, gas and other media!
The valve plate of the butterfly valve and the spool of the ball valve both rotate around their own axis. The valve plate of the gate valve moves up and down along the axis; the butterfly valve and gate valve can use the opening to adjust the flow; the ball valve is inconvenient to do so.
1. The sealing surface of the ball valve is spherical.
2. The sealing surface of the butterfly valve is a circular cylindrical surface.
3. The sealing surface of the gate valve is flat.
Classification of valves .
Use the purpose of the valve.
Cut off: cut off the medium in the pipeline. Such as gate valve, globe valve, ball valve, plug valve, butterfly valve, etc.
Check whether it is reused: prevent the medium from flowing back. For example, check valves.
Regulation: Regulate pressure and flow. Such as: regulating valve, pressure reducing valve, throttle valve, butterfly valve, V-opening ball valve, balance valve, etc.
Distribution: Change the flow direction of the medium in the pipeline and distribute the medium. Such as distribution valve, three-way or four-way ball valve, plug valve, etc.
Purpose: Used for overvoltage protection. Such as valves, overflow valves, etc.
Other special purposes: such as traps, air traps, drain valves, exhaust valves, breathing valves, slag discharge valves, temperature control valves, etc.