The shape of the guide valve is trapezoidal, and it is combined with the rectangular valve to form the combined guide valve tray. The combined guide valve tray has both the advantages of the rectangular guide valve tray and the trapezoidal guide valve tray, overcomes the disadvantages of both, and has a wider application range and better operating performance.The critical gas velocity of the valve hole of the combined guide valve tray is the same as that of the guide valve tray under the corresponding conditions.
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