And single screw pump in the pump itself cannot set the reliefvalve, can only be set up inline, 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。
2
Must not be smaller than the pipe size of the reliefvalve 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。
3
Vent the air gap and drain line from the reliefvalvein accordance with code requirements.