... HPV high pressure valve 高压阀 ILRV in-line relief valve 管道泄压阀 INO inlet open 进气阀打开 ...
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And single screw pump in the pump itself cannot set the relief valve, can only be set up in line, increase the investment of equipment cost and installation cost.
而单螺杆泵在泵本身不能设置安全阀，只能在管路中设置，提高了设备投入成本和安装成本。
Must not be smaller than the pipe size of the relief valve or have any reducing coupling installed in the discharge line.
不能小于安全阀的管道口径，也不能在排泄管上安装任何缩径管接头。
Vent the air gap and drain line from the relief valve in accordance with code requirements.
按照规程的要求，排出安全阀气隙和排放管道的空气。
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