Shanghai valve cast steel ball valve come out In the 1950s, with the rapid development of science and technology, production technology and product structure of the continuous improvement in a short period of 40 years, has rapidly developed into a major valve. In the developed countries of western c
Read full articleHydraulic support is a supporting device in coal mining machinery. After overhauling it, it can be used for five years underground. However, the service life of various hydraulic valves in hydraulic support is very low. For a long period of 3 months and a short period of only a few weeks, Foreign
Read full articleSafety valve installation, due to improper use, often cause many failures. If these failures are not promptly ruled out will affect the safety valve's role and service life. Common failures are: (1) discharge valve does not back seat This is the main spring bent stem, valve installation location
Read full articleTo ensure the reliable operation of the control valve, here not only refers to the manufacturing quality of the control valve itself, but also involves the correct calculation of the control valve, valve selection, as well as including the operator training and quality improvement. 1, in order to pr
Read full articleButterfly valve seal refers to the seal on both sides of the metal material are harder or other materials are known as "hard seal." This seal sealing performance is poor, but high temperature, abrasion resistance, good mechanical properties such as : Steel + steel; steel + copper; steel +
Read full articleZS stainless steel horizontal single-stage centrifugal pump Installation conditions: ZS-type stainless steel horizontal single-stage centrifugal pump for the direct connection of the pump shaft, the pump, pump shaft and standard motor: 1) The pump should be installed in a ventilated and anti-icy
Read full articleOrdinary eccentric rotary valve body is a long-necked clip-on valve body, arcuate intercepting or hemisphere coronal ball valve, seat, retainer, stem (main, countershaft), guide sleeve and packing and other components. Parts of a single type, did not do between the different specifications of standa
Read full articleWhen setting the safety valve should pay attention to the following points: (1) container gas, liquid two-phase material safety valve should be installed in the gas phase. (2) Safety valve for the release of combustible liquid, the safety valve outlet should be connected with the accident tank. When
Read full articleElectric valve to rely on electricity to run, the average daily power consumption is usually a few degrees or so. Usually through the sensor on the downstream water level (water pressure) to monitor the control system depends on the water level or water pressure to control the implementing agencies,
Read full articleâ— Overview: SNH three screw pump is designed and manufactured according to the national standard GB10887-89. Three-screw pump is a positive displacement pump, which is the use of screw meshing principle, relying on the rotation of the screw in the pump sleeve intermeshing, the medium is clos
Read full articleValves important parameters are the valve flow coefficient and cavitation coefficient, which in the advanced industrial countries generally available in the valve information, and even printed in the sample also. China's production of the valve is basically no information in this area, because a
Read full articleButterfly butterfly valve installed in the pipe diameter direction. Valve in the butterfly valve body cylindrical channel, the disc-shaped disc rotates about the axis, the rotation angle is between 0 ° ~ 90 °, rotated to 90 °, the valve is fully open state card. Butterfly valve structure
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