Screw pump should be in suction stop valve fully open under the condition of starting, in case of overload or empty.
螺杆泵应在吸排停止阀全开的情况下起动，以防过载或吸空。
Pump stop, they would first close the discharge stop valve, and switch to a complete halt until pump suction stop valve was closed.
泵停车时，应先关闭排出停止阀，并待泵完全停转后关闭吸入停止阀。
Pump stop, they would first close the discharge stop valve, and switch to a complete halt until pump suction stop valve was closed.
泵停车时，应先关闭排出停止阀，并待泵完全停转后关闭吸入停止阀。
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