1.before the installation of the three screw pump, check whether the oil seal of the pump is good, and check whether the pump is damaged in the transportation process. It is possible to use hand rotation coupling to have the phenomenon of clamping force. If so, the pump should be cleaned, repaired and corrected.

2.when the three screw pump installs the oil inlet and drain pipe of the pump, the diameter of the pump can't be less than the oil inlet and the oil drain diameter of the pump, and the oil inlet pipeline must not be too long, and the elbow must not be too much, otherwise, it will affect the working state of the pump.

3.when two or more three screw pumps are installed on the same line, to facilitate the start of the pump, a reverse check valve must be installed on the oil pipe of the pump.

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4.for the standby pump with high viscosity (such as heavy oil) at high temperature (above 60 degree), the hot standby pump must be hot, otherwise the pump will start overheating or pump damage if it starts at low temperature. (recommended check valve Dili tubing to exhaust near the pump in the car on a small return valve installed in parallel, one on the Weifang Diesel Engine for standby pump can enlight reflux valve, the pump slowly reversed its reverse speed.

5.the transport medium contains mechanical impurities, which will seriously affect the operation of the pump and reduce its service life. Therefore, before welding the pump, we must carefully remove the welding slag, sand and other impurities. The filter is installed near the pump at the inlet of the oil pipeline, and the size of the hole of the filter can be determined according to the working condition and the viscosity of the medium. (generally available 40-80 mesh network), the filter area of the steel pipe code machine should not be less than 20 times the section of the oil pipe.

6.try to connect the pressure gauge and the vacuum meter on the screw hole at the pump inlet and the oil outlet to facilitate the operation of the pump.

7.the shaft of the original motive and the pump must be on the same center line and can be checked at 900 intervals on the circumference of the coupling.

8.original motive and the pump must be in the same direction, and the reverse of the driving pump is strictly prohibited. When the motor is connected, the coupling between the motor and the pump should be removed first, and the motor should be run. Make it turn to the steering sign of the pump.