In coal liquefaction plant, liquefied coal slurry to switch and the continuous control, in the metallurgical industry, pneumatic conveying ore powder need continuous control, there are many similar occasions, gaseous and liquid media containing large amount of hard particles in the medium, the medium flow control and flow control, for similar applications should be how to choose control valve:
1, the switch control can choose ceramic ball valve or prevent particle design metal hard seal ball valve, valve parts special hardening treatment.
2, regulation and control can choose the seal of the V regulator valve or camflex valve, valve parts special hardening treatment, special attention should be given to prevent axial particle design, in order to prevent the shaft of the death card.
If the particles containing medium, and the need for continuous operation, and even the fluid is corrosive in nature, so if the metal valve (either stainless steel or hard alloy) are due to wear and leakage, affect valve life and the daily production, more important is because particles and metal to metal affinity at wear process, and make the pipeline plugging, the problem that exists in reality, in order to fundamentally solve the problem, we should use the industrial ceramic valve. Although the price is higher than the valve metal valve general, but compared to the "price", we will find, the use of ceramic valve is put things right once and for all. In fact, power plant desulfurization now (medium: the limestone slurry), chemical process relatively harsh environment, ceramic ball valve is becoming more and more popular.
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