just as a voice for the adverse effects of the body, some frequency can give full play to the mechanical equipment lead to damage. When the pressure regulating valve are reasonably selected, the risk of wind erosion, which will cause high noise and vibration level, cause very rapid destruction of the internal and the middle and lower reaches of the pipe. In addition, general can cause vibration and high noise level is likely to destroy pipeline, equipment and other machinery and equipment.

the valve with the passage of time, parts of a recession, due to valve cavitation caused by pipeline system software is very easy to produce serious harm. This kind of damage, mostly by the kinetic energy of the vibration noise, speed up the etching process. And cavitation reflect the high noise caused by the pulse signal of the vibration of the flame image bubble surrounding and middle and lower reaches of shrinkage and collapse. Although this generally result in gate and rotary valve in the valve body, it can in fact produce in a short, high efficiency wafers similar behavior main body part of the v-shaped ball valve, very is a disc valve valve tube side of the middle and lower wear. When the valve is the endurance of a part of the case is very easy to cause cavitation phenomenon, that is very easy to wear of valve tube and welding welding to repair the leak, the Industrial Valves is unfavorable the section of the pipeline.

no matter whether in the middle and lower reaches of the interior of the valve or valve cavitation and cavitation of machinery and equipment will suffer widespread destruction. Thin pulse dampers, yellow and small cross section structure of the type that hang a wall, flame picture can provoke shock vibration common faults. The common point of failure often is discovered in the instrument and equipment, such as the barometer, intelligent transmitter, thermal resistance and waterproof casing, steam flowmeter, sampling system. Electric actuators, locator and travel switch with yellow will speed up any possible damage, installation support frame, standard parts and rf connector will be loose and not succeed because of the vibration.

the shaft body etching, among this produce damage surface exposure in vibration, is a common peripheral valve cavity. This creates a hard metal oxide as wear-resisting material damage to the surface in the middle of the damage of speed up. Affected machines include protection and the product, except the pressure regulating valve, pump, rotary screen, the rotation of the sampler and everything else or drag organization.

gao zhen4 amplitude of vibration will also make metal material valve parts and pipe wall crack and erosion. The scattered particles or corrosion metal materials chemical materials are probably the pollution of the environment the pipe material, in environmental health level of valves on the pipeline and high purity of pipe material are causing major workplace hazards. This is not allowed.

cock of cavitation damage prediction analysis is more complex, not simple to calculate the resistance of flow pressure drop. Experience shows that liquid is likely to be the mainstream of work pressure to reduce to the vapor pressure of liquid is part of the gasification and vapor bubble collapses. Some valve manufacturers forecast analysis according to the defined at the beginning of the year erosion destroy an early damage pressure drop. A valve manufacturer of cavitation damage prediction analysis way of beginning, is based on objective facts, it is the collapse of vapor bubbles, cavitation and noise.

clear way of cavitation damage

unique valve clearance cavitation design scheme selection pressure of separation and classification:

& quot; The valve separation & quot; Is to put a large total flow area into multiple small total flow, flow in valve design, make the total flow according to the multiple parallel surface small openings. Because the size of the cavitation bubbles is part of the circulation of commodities through the opening of measure. Small openings air bubbles, less and less noise and less damage.

' Grading pressure drop & quot; Represents the design of valve is better to have two or several series adjustment, therefore, not all the pressure drop of the separate process, it is a lot of smaller processes. Under certain pressure drop can be avoid in the flow of work pressure, the lower the vapor pressure of liquid, then remove the valve cavitation like now.

separation and in the same valve connected with the pressure drop of installment according to the following method to improve the cavitation resistance. changes in the whole process, accurate positioning of the regulating valve, pressure at the inlet of the valve is higher ( Such as far upstream and downstream side, or in the low aspect ratio) , and sometimes to eliminate cavitation problem.

in addition, the accurate positioning of the pressure regulating valve parts of the temperature of the liquid, and vapor pressure, low ( Such as ultra-low temperature side heat exchanger) Can help to remove the cavitation problem.

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