因此，在优先定向阀门上具有HP标志，用于表示高压。
Therefore there is an HP stamped on the preferred direction of the valve that stands for HIGH PRESSURE.
TORQSEAL的标准阀门具有优先定向和非优先定向。
The TORQSEAL valve has a preferred and non-preferred direction as standard.
优先定向以具有较高压力的轴面作为流体压力，用于帮助阀板密封。
The preferred direction would be shaft side high pressure as the pressure in the flow would assist the disc in sealing.
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