Henan valve stem manufacturers say that the valve stem is an important component part of the valve. The valve stem will continue to be subjected to tension, pressure, and torsion during the opening and closing of the valve. It will also rub against the medium and the packing during the process, so The quality of the valve stem must be excellent, and it must have certain characteristics such as high temperature resistance, friction resistance, corrosion resistance, and aging resistance.The characteristic of traditional valve stem processing is that the thread is not high enough, and the quality of the chip-free thread rolling is not good enough, which makes the entire valve body easy to deform, twist and break, and has poor anti-aging effects.The grinder of the polished rod part is not good and takes a long time.
The valve stem is an important part of the valve, which plays the role of transmission and connection.The upper part of the valve stem is connected with the actuator, and the lower part is connected with the valve core. As long as the valve's actuator has an action, it will drive the valve stem and realize the action of opening the valve.According to the different materials of the valve stem, it can be divided into several kinds of valve stems, copper alloy stem, carbon plastic steel stem, alloy steel stem, stainless steel stem and bearing chrome steel stem.
The chamfering part adopts double clamping, turning and pulling back sealing. The concentricity is not good, and the inverted sealing is easy to leak. The end part is indexed by the indexing plate of the milling machine, the processing speed is slow, the processing procedure is many, and the processing time is long.The new valve stem has perfected the shortcomings of the traditional valve stem, the thread strength is high, accurate, the thread part and the polished stem part are concentric, and the reverse sealing performance is good.
In our country, the thread of the traditional valve stem uses a threaded flying knife. This design will easily cause wear, deformation, and even distortion of the valve stem.The current new type of valve stem in our country avoids this problem very well, and its performance in other aspects has been improved.The new valve stem makes the torque of the valve smaller, so that the staff can save effort and time when opening and closing the valve.Not only that, it also improves the sealing effect of the valve sealing surface, increases the strength, and effectively extends the service life of the valve.