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Ball valve installation and maintenance should be paid attention to the following matters
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Ball valve installation and maintenance should be paid attention to the following matters

1, should have rotary valve handle position.
2, cannot be used for throttling.
3, belt drive mechanism of ball valve can be divided into: (1) (2) the electric ball valve (3) hydraulic pneumatic ball valve ball valve (4) air hydraulic ball valve (5) electric hydraulic ball valve 6 turbine drive ball valve

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