Add: Mechanical&Electrical Industry Zone,Yuhuan,Zhejiang,China
The main parts of the hydraulic valve body material, first of all should take into account the physical properties of the working medium (temperature, pressure) and chemical properties (corrosive) and so on. At the same time, should also understand the degree of cleanliness of the media (with or without solid particles). Hydraulic Valve In addition, we must also refer to the relevant provisions and requirements of the State and the use of the department.
Many kinds of materials to meet the hydraulic valve body in a variety of different conditions of use requirements. However, the correct and reasonable choice of hydraulic valve body material, Hydraulic Valve you can get the most economical hydraulic valve valve life and the best performance.
Gray cast iron gray cast iron valve for its low price, Hydraulic Valve wide application and application in various fields of industry. They are usually used in the case of water, steam, oil and gas as a medium and are widely used in chemical, printing and dyeing, oiling, Hydraulic Valve textile and many other industrial products with little or no effect on iron pollution.
Applicable to the working temperature between -15 ~ 200 ℃, the nominal pressure PN ≤ 1.6MPa low pressure hydraulic valve body.
Ductile iron is a kind of cast iron, this cast iron, lumps or spherical graphite to replace the gray cast iron in the flake graphite. This change in the internal structure of the metal makes it more mechanical than ordinary gray cast iron, and does not damage other properties. Therefore, Hydraulic Valve the hydraulic valve body made of ductile iron is more pressure than the hydraulic valve body made of gray cast iron. Applicable to the working temperature between -30 ~ 350 ℃, the nominal pressure PN ≤ 4.0MPa in the low-pressure hydraulic valve body.
With the extension of the use of hydraulic valves, failure or failure is inevitable. Hydraulic valve failure or failure is mainly due to wear and tear, cavitation and other factors caused by the gap is too large, hydraulic valve leakage and hydraulic oil pollution caused by the deposition of hydraulic valve spool caused by abnormal movement or chucking. When the hydraulic valve failure or failure, the majority of enterprises to replace the new components of the way to restore the hydraulic system function, the failure of the hydraulic valve is a waste. In fact, Hydraulic Valve most of these parts of the hydraulic valve is still in good condition by partial maintenance can be restored. The significance of the study of hydraulic valve maintenance is not only to save the cost of component purchase, when the failure of the hydraulic valve without spare parts or order takes a long time, and the equipment may be due to long-term downtime through maintenance can temporarily maintain the equipment and the entire production line to run its economic benefits It is considerable.
Hydraulic valve is actually hydraulic transmission, Hydraulic Valve used to control the liquid pressure, flow and direction of the components. The hydraulic valve sealing element damage is a common phenomenon, the main factor is the impurities in the working fluid. Hydraulic Valve These impurities are milled between the sealing elements to cause leakage of the valve. Therefore, foreign countries have proposed the corresponding level of hydraulic components, should be used with the appropriate accuracy of the filter. They think 5um pump seal components, Hydraulic Valve if the filter accuracy of 3 / um of the filter, the hydraulic valve life can be improved by 10um 10 times.
= The use of hydraulic valve performance and the valve life of the proposed higher requirements. At present, the life of the valve is measured by the total flow rate of the emulsion passing through the test valve and the number of opening and closing of the valve under the conditions of a filter with a 120 mesh and a magnetic filter. But in fact the indoor type test and the actual results of the actual difference between the great. Now many countries in the form of experiments, Hydraulic Valve increased anti-pollution requirements, some in the emulsion mixed with the appropriate coal, and some add mechanical impurities。