What are the types of valve bodies that can be divided according to the driving method introduced by the casting manufacturer
According to the classification of driving methods, active valves refer to valves that do not require external force to drive, but rely on the energy of the medium itself to make the valve operate. Such as safety valves, pressure reducing valves, drain valves, check valves, active regulating valves, etc. Power driven valve: Power driven valve can be driven using various power sources.
Electric valve: a valve driven by electricity. Pneumatic valve: a valve driven by compressed air. Hydraulic valve: A valve that is driven by the pressure of a liquid such as oil. In addition, there are combinations of the above driving methods, such as pneumatic electric valves.
Manual valve: The manual valve is operated manually by means of a handwheel, handle, lever, and sprocket. When the valve has a large opening and closing torque, this wheel or worm gear reducer can be set between the handwheel and the valve stem. If necessary, universal joint and transmission shaft can also be used for remote operation.
In summary, there are many methods for classifying valves, but they are mainly classified based on their effectiveness in pipelines. General valves in industrial and civil engineering can be divided into 11 categories, namely gate valves, globe valves, plug valves, ball valves, butterfly valves, diaphragm valves, check valves, throttle valves, safety valves, pressure reducing valves, and drain valves. Other special valves, such as valves for external use, valves for hydraulic control pipeline systems, and valves for various chemical machinery equipment bodies, are not within the scope of this book.