What Is So Called Stainless Steel Flanged Ball Valve
Published on:
2019-06-28
What Is So Called Stainless Steel Flanged Ball Valve ?
What Is So Called Stainless Steel Flanged Ball Valve
The ball valve and the gate valve are the same type of valve. The difference is that the closing member is a ball, and the ball rotates around the valve body to achieve a valve that opens and closes. The ball valve is mainly used in the pipeline to cut, distribute and change the flow direction of the medium. Flange ball valve standard GB/T21465-2008 "Valve terminology" is defined as: the opening and closing member (sphere) is driven by the valve stem and rotates around the axis of the valve stem.
Ball valve advantage
Ball valves are a new type of valve that is widely used and has the following advantages:
1. The fluid resistance is small, and its resistance coefficient is equal to the pipe length of the same length.
2. Simple structure, small size and light weight.
3. Close and reliable, the sealing surface material of the ball valve is widely used in plastics, and has good sealing performance. It has also been widely used in vacuum systems.
4. It is easy to operate, and it can be opened and closed quickly. It can be rotated by 90° from full opening to full closing, which is convenient for long-distance control.
5. Easy maintenance, the ball valve has a simple structure, the sealing ring is generally active, and it is convenient to disassemble and replace.
6. When fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium. When the medium passes, it will not cause erosion of the sealing surface of the valve.
7. Wide range of applications, from small to a few millimeters, up to a few meters, from high vacuum to high pressure can be applied. This type of valve should generally be installed horizontally in the pipeline.
Installation and maintenance considerations
Ball valve installation and maintenance should pay attention to the following:
1. Leave the position where the valve handle rotates.
2. Cannot be used for throttling.
3. The ball valve with transmission mechanism should be installed upright.
New features
Folding to adapt to harsh working conditions
The ball valve only needs to be rotated 90 degrees and a small turning torque to close tightly. The fully equal valve body cavity provides a small, straight-through flow path for the medium. Ball valves are generally considered to be the most suitable for direct opening and closing, but recent developments have designed ball valves to provide throttling and control flow. The main features of the ball valve are its compact structure, easy operation and maintenance, suitable for general working media such as water, solvent, acid and natural gas, and also suitable for medium with harsh working conditions such as oxygen, hydrogen peroxide, methane and ethylene. The ball valve body may be integral or combined.
Folding applies to strict cutting conditions
The track ball valve is a relatively new type of ball valve. It has some unique features unique to its structure. For example, the switch has no friction, the seal is not easy to wear, and the opening and closing torque is small. This reduces the size of the actuators that are supplied. With multi-turn electric actuators, the medium can be adjusted and tightly closed. It is widely used in petroleum, chemical, urban water supply and drainage and other conditions that require strict cutting.
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