Sell Sell pneumatic ball valve

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This is a kind of ball valve which can be operated by pneumatic actuator. The ball valve structure principle basically according to a polishing spool(including route way) fold in two valve seat(upward and backward position) . The revolution of spool holds up the fluid or flows the spool, then the strength from the differential pressure of upward and backward position causes the spool abut against the valve seat(floating ball structure) . In this case, the moment is decided by the multi-friction between spool and valve seat, stem and packing.