Selection and configuration instructions for three screw insulation pump unit and precautions for use and startup

Selection and configuration instructions for the three screw insulation pump group and precautions for use and startup

※ It is strictly prohibited to use pipeline filters or Y-shaped filter devices. When configuring filters, please ensure that the filtering area is 20-30 times the cross-sectional area of the pump diameter. And correctly configure the mesh size of the filter according to the cleanliness of the medium

※ It is strictly prohibited for the inlet and outlet pipelines of the pump to not match the inlet and outlet pipelines of the pump. The pipeline diameter configuration must be consistent with the inlet and outlet diameter of the pump. To avoid cavitation or inability to self suction. Thin pipelines can lead to cavitation, causing the pump to work in a state of insufficient food, resulting in a decrease in flow and pressure of the three screw pump unit, and even abnormal vibration and noise. Long term operation can also cause pump jamming and serious damage to the screw pump

※ It is strictly prohibited to idle without any medium. Before starting and driving, please make sure to add lubricating or conveying media

※ It is strictly prohibited to start the machine with back pressure and close the outlet valve

※ It is strictly prohibited to start rotation in a direction that does not comply with the pump rotation label

※ It is strictly prohibited to adjust the stability valve bolts arbitrarily. The stabilizing valve is only used to protect the stability of the pump and match the motor power with the pump's working state. It is strictly prohibited to use it as a pressure regulating valve or an overflow valve

The installation height of the three screw pump must fully consider the cavitation conditions of the pump and the self suction capacity of the pump (the cavitation margin is related to the viscosity and speed of the medium and the lead of the screw)

※ It is strictly prohibited for foreign objects such as welding slag to enter the pump chamber, and it is necessary to maintain the cleanliness of the pump chamber and pipeline inside

※ Double pumps in parallel must be equipped with a one-way valve at the pump outlet to prevent medium backflow from driving the three-screw pump in reverse

※ Due to the packaging, transportation, lifting, loading and unloading, as well as the tightening of pipeline bolts, the original factory positioning of the pump may change or even be severely misaligned. Therefore, after the installation and fixation of the three screw pump unit piping system, it is necessary to recheck the coaxiality of the three screw pump and motor before starting and driving