Fixed ball valve, the sphere by a rotary valve to control the opening and closing of the valve. The sphere in the middle there is a hole, can rotate 90 °, the diameter of the hole is equal to or less than the diameter of pipe. When the ball rotated 90 °, import and export of pipeline surface is spherical, and close the valve to cut fluid. When the ball valve turn 90 °, the pipe surface are the ball hole surface of imports and exports, the fluid through valves, ball valves can rotate to a different point of view, which can control the size of the fluid. Fixed ball valve commonly used in general line, such as conveying water, oil, steam, etc.
The globe valve is also known as the cut-off valve, can completely seal off the valve seat outlet by rotating the stem and applying pressure, thus preventing the flow of fluid; Stop valve is commonly used in natural gas, liquefied gas, sulfuric acid and other corrosive gases, liquid pipeline.
The gate valve acts like a gate, rotating the stem and controlling the gate to move vertically up and down to control the flow. The sealing ring on both sides of the gate can completely seal the whole section, and the gate valve can only be fully opened and closed, and cannot be used as the valve to regulate the flow rate.
Swing check valves rely on fluid pressure to open the cover. When the pressure in the valve inlet and outlet pipe is balanced, the valve cover can close by its own gravity, preventing the flow through. Its main role is to prevent fluid back flow, belongs to the automatic valve class. It is mainly used in petroleum, chemical, pharmaceutical and other pipelines.
Butterfly valve is also known as flap valve, can rotate 90°. By rotating the valve stem to drive disc rotation, change the disc Angle can control the flow of fluid, can be used to cut, connect, adjust the flow in the pipeline. It is often used in water supply, gas supply and other pipelines, as a regulating and intercepting device.
Control valve is also known as the control valve, used to control the size of the fluid, when the valve regulating position receives the regulating signal, the valve stem will automatically control the valve according to the signal switching degree, so as to achieve the speed of fluid and pressure regulation.It often used in heating, gas, petrochemical and other pipelines.