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Our company specializes in the production of (b) gfy, YJd series air shutoff (air shutoff), star unloader, DS series electric air lock, DN type rotary valve, quick opening valve, cleaning valve, air driven rotary valve and other products. It is widely used in lithium cathode materials, grain, feed, petrochemical, pharmaceutical, starch, grease, chemical drying, dust removal, metallurgy, environmental protection, electronics, coal, construction, electric machinery and other industrial equipment. It is used for unloading solid particles, powders and ultra-fine powders under the conditions of pneumatic conveying and positive and negative pressure of pipe network.