Bacon & Thomas, PLLC
Mixing valve structure for destroying pressure difference between liquids
 A valve structure is provided for destroying pressure difference between incoming fluids. The valve body includes two inlet passages and a merging passage that is communicated to an outlet. A pressure-balancing device is mounted in the merging passage and includes a shaft supported by two supports or end closures. Two bladed wheels are mounted to the shaft and may be impacted by the incoming fluids to thereby destroy the pressure difference between the incoming fluids. 
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Chen-Liang
Chang