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Foreign PDS valve performance comparison analysis
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2017, 53(2):
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Asbtract
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In each unit of polyolefin, generally USES the PDS valve, this valve requires high switch frequency, long service life, safe and reliable.Through the China and South Korea petrochemical field repair situation can be seen, due to the high frequency switch valve, and polyolefin powder easily in the valve cavity agglomeration.Valve design, manufacturing and material use, the valve used to start running is not smooth, binding, and, ultimately, holding in death of the valve can't action, causing parking device.
This kind of high frequency valves at present monopoly by foreign brands, such as AUGUS, TYCO, KITZ, etc. These PDS valve manufacturers, have their own advantages and disadvantages in use.Owing to the high price of this kind of valve, and key spare parts spare parts cycle is long, some price is higher than the whole valve price.Once appear fault,looking for foreign manufacturers to maintain or provide spare parts, from the perspective of process production need, also not realistic.So how to select suitable for polyolefin device and high cost performance, the use of reliable performance of PDS valve is very important. The PDS valve through the overhaul, overhaul, maintenance, surveying and mapping, summarize the fault reason, and comparing the usage of each manufacturer of the valve.To complete the PDS valve structure optimization, to promote the localization lay the foundation of the valve.
