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- main pressure differential 周压差
- Connect wire to pressure differential switch. 连线至差速压力开关。
- Enter 0 for main pressure tolerance plus. 主压力正公差输入0。
- Activate the individual selection main pressure. 激活单个选择的主压力。
- Note the current main pressure actual value. 记录当前主压力的实际值。
- Purpose: To test operation of pressure differential relief valve. 目的:检测压差安全阀的运行。
- Enter 50% for main pressure tolerance plus and tolerance minus. 主压力正负公差输入为50%25
- Select "with filling" at the main pressure regulation. 选择“物料”调节主压力。
- Note the set value for compaction force main pressure. 记录主压力设定值。
- Adjust balancing valve until pressure differential gauge reads pressure drop required for desired flow rate gpm. 调整平衡阀直到压差表读出压降符合所要求的流量（加仑/分钟）为止。
- The combined action mechanism of the pressure and pressure differential in casing damage. 油田套管损坏的压力与压差联合作用机制。
- Connect hoses, vent meter and read pressure differential in accordance with instructions furnished with meter. 连接软管,排放仪器气体,按照仪器配置的说明书读出压差值。
- If pressure differential continues to decrease (approaching "zero"), shutoff #2 is reported to be "leaking". 如果压差继续降低(接近"零")，则说明关闭阀2号"泄漏"。
- Maximum pressure differential required for valves with lever actuators should not exceed the limits listed. 采用杠杆执行器要求阀门的最大压差不能超过下表所列的极限。
- Open VB to reestablish first check valve differential pressure. Close VB. Record pressure differential. 开启VB，重新恢复第一止回阀的压差。关闭VB。记录压差。
- Direct connection to mains pressure water supply is not permitted. 严禁直接连在有压力的供水装置上。
- Thus it was demonstrated that the main pressure zone was little affected by the downstream flow condition. 由此可见，下游的流动情况对主要压力区几乎没有影响。
- The punch diagram displays that the increased compaction force main pressure will be regulated to the set value. 冲杆图表显示主压力增加校准设定值。
- Observe the pressure differential gauge. If there is a decrease in the indicated value, the No. 1 check valve is reported as "leaking". 观察压差表。如果读数没有减少,则1号止回阀报告为“泄漏”。
- Enter a value for main pressure set value that is approximately 10% higher than the displayed revolution average value. 输入一个主压力设定值,大约比旋转平均值高10%25。
