Cast steel gate valve is one of the most commonly used cut-off valves, which is mainly used to connect or cut off the medium in the pipeline, and is not suitable for adjusting the flow rate of the medium. Cast steel gate valves are suitable for a wide range of pressure, temperature and caliber, especially for medium and large caliber pipes. The sealing surface adopts asbestos graphite or flexible graphite, the operation mode is manual, gear transmission, electric, pneumatic and so on, which is suitable for water, steam and oil medium pipeline. Next, the author introduces the standard of cast steel gate valve and the classification of cast steel gate valve.
Design and manufacturing standard: GB/ T12234-2007
Structural length standard: GB/ T12221-2005
Connection flange standard: GB/ T9113
Pressure temperature class:GB/ T12224-2005
Test inspection standard: GB/ T13927-2008
Truncation class: such as gate valve, stop valve, plug valve, ball valve, butterfly valve, needle valve, diaphragm valve, etc.
Vacuum type: such as vacuum ball valve, vacuum baffle valve, vacuum charging valve, pneumatic vacuum valve, etc. In that vacuum system, the vacuum system element used to change the direction of the air flow, regulate the flow of the gas, cut off or switch on the line is referred to as a vacuum valve.
Special purpose category: such as pipe cleaning valve, vent valve, sewage valve, exhaust valve, filter, etc.