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Liquid-control Unilateral Valve is also named Unilateral Locked Valve or Pressure-keep Valve. It is the same as Unilateral Valve, use to prevent the oil-stream from flowing backward, but it can open the unilateral valve to let the oil-stream flow two ways when necessary.
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The Liquid-control Unilateral Valve adopts a taper valve core, which supplied a good performance in airproof. This valve could be used as a unilateral lock in the oil route in order to keep pressure when the oil route needed to be close. There are two types to control the leakage of oil, inside discharge and outside discharge. Inside discharge type can be used in oil routes without back-pressure at the reverse exit, otherwise, outside discharge type is necessary to reduce the pressure of control-oil.
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