Introduction To The Structural Features Of American Standard Ball Valves
What are the structural features of Ball Valve?
The main function of the American Standard ball valve in the pipeline is to cut off, distribute and change the flow direction of the medium. Regarding its structural design, Kaihao Valve will introduce it to you below.
1. Fireproof structure
The valve seat of the American Standard ball valve adopts a special structure, and the non-metallic sealing surface material will burn in the event of a fire. The ring uses the elastic force of the spring to push the valve seat and the ball in and seal it to prevent the spread of fire and the outflow of the medium.
2. Anti-shattering structure
When the medium passes through the valve, the pressure in the valve stem cavity may push the valve stem out. In order to avoid this situation, a boss structure is provided at the bottom of the valve stem, so that even if the packing or thrust bearing is burned or damaged, the valve stem will become a boss due to the medium pressure of the valve body, and a large amount of damaged packing parts will be used. The valve body is sealed and in close contact to prevent medium leakage.
3. Hydrostatic device
When operating the valve, static electricity is generated due to the friction between the ball and the valve seat made of non-metallic materials (such as PTFE). The charge is stored in a row of balls. In order to prevent static sparks, a special anti-static device is installed on the valve to release the generated static electricity.
4. Automatic pressure relief structure
When confined in the valve cavity, when the medium changes due to the pressure of the pipeline system or the temperature of the medium, when the pressure inside the middle cavity increases abnormally, the medium inside the middle cavity will generate its own thrust to press the valve seat to automatically release the pressure and ensure the safety of the valve.
