check valve
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1.A double check valve assembly shall be installed at each noted location.
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2.and a pilot operated check valve is linked with a valve block on the oil cylinder.
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3.DUAL CHECK VALVE BACKFLOW PREVENTER For low hazard cross- connections . Continuous pressure applications .
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4.dual way check valve for the "outstanding new products in Shanxi Province. "
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5.The debris is prevented from flowing back out of the bailer by a check valve.
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