The Screw pump 3GR30X4W2 is a rotor-type positive displacement pump. Due to the mutual meshing of the spiral grooves on the driving screw and the driven screw and their cooperation with the inner surface of the three holes of the bushing, a multi-stage dynamic seal chamber can be formed between the inlet and outlet of the pump. These dynamic seal chambers will continuously move the liquid axially from the pump inlet to the pump outlet, and gradually increase the pressure of the delivered liquid, thereby forming a continuous, smooth, axially moving pressure liquid.

The liquid transported by the Screw pump 3GR30X4W2 is a variety of lubricating liquids that do not contain solid particles, corrosive oils and similar oils. High-viscosity liquids can also be transported by heating and reducing viscosity.

Screw pump 3GR30X4W2 installation requirements:

1. Before installation, check whether the oil seal of the pump is in good condition and whether the pump is damaged during transportation. You can turn the coupling by hand to see if there is any jamming. If so, the pump should be disassembled for cleaning, repair and correction.

2. When installing the oil inlet and oil discharge pipes of the pump, their diameter must not be smaller than the diameter of the pump’s oil inlet and oil outlet. The oil inlet pipe must not be too long and there must not be too many elbows, otherwise it will affect the working condition of the pump.

3. When more than two pumps are installed on the same main line, in order to facilitate the starting of the pump, a check valve must be installed on the oil discharge pipe near the pump.

4. For backup pumps that transport oils with high viscosity (such as heavy oil) at higher temperatures (above 60°C), they must be hot backup pumps. Otherwise, starting the pump at low temperatures will cause motor overload or pump damage. (It is recommended to install a small return valve in parallel next to the check valve on the oil discharge pipe close to the pump. For the backup pump, the return valve can be opened slightly to make the pump reverse slowly. Its reverse speed is 100 rpm, so that part of the hot oil can flow regularly. Pass through the pump to achieve the purpose of pump heat backup).

5. The conveying medium contains mechanical impurities. It will seriously affect the operation of the pump and reduce its service life. Therefore, before installing the pump, welding slag, sand and other impurities in the oil inlet pipe must be carefully removed, and a filter should be installed in the oil inlet pipe close to the pump. The size of the filter mesh can be Determine according to working conditions and medium viscosity. (Generally, 4080 mesh can be used). The filter area should generally not be less than 20 times the cross-sectional area of ​​the oil inlet pipe.

6. Try to connect pressure gauges and vacuum gauges to the threaded holes at the oil inlet and oil discharge ports of the pump to facilitate observation of the pump’s operating status.

7. The rotating shafts of the prime mover and the pump must be on the same center line. Use a ruler and feeler gauge to check at 90° intervals on the circumference of the coupling.

8. The direction of rotation of the prime mover and the pump must be consistent, and it is strictly prohibited for the prime mover to drive the pump in reverse direction. When wiring the motor, you should first disconnect the coupling between the motor and the pump and perform a test run on the motor. Make its direction consistent with the pump’s direction mark.