Since the domestic non-leak seal technology - mechanical seal applied to industrial pumps, China has a number of pump seals the use of mechanical seals, but the effect is not satisfactory, especially in the coal washing industry, because the pump conveys the liquid solid particles Many operating conditions are poor, mechanical seals are sometimes not as reliable as packing, so the Chinese media pump sealing technology has always been the world packing, sealing effect is far behind and imported pumps.
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