pneumatic knife gate valve is closed, sealing surface can only rely on medium pressure to seal, that depend on medium pressure, the disc will be to the other side of the valve seat sealing surface pressure to ensure that the seal face seal, this is the seal. Most of the pneumatic knife gate valve is forced sealing, the valve is closed, to rely on outside force forced the ram pressure to the valve seat, to ensure the sealing surface sealing. This valve shall generally be installed in the pipeline. The use of the pneumatic knife gate valve as follows: 1. Mining, iron and steel industry - - - - - - Used in coal, the residue slurry, etc. ; 2. Purification plant - - - - - - - Used in waste water, mud, dirt and suspended solids with clear water; 3. Papermaking industry - - - - - - - For any concentration of the pulp and the mixture of material to water; 4. Power plant ash - - - - - - - Used for ash slurry.

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