Screw pump installation before the inspection 1. Check the lever is loose, if tightened immediately tightened. 2. Check the motor, reducer, bearing seat and each bracket mounting bolts are loose, whether to move. If so, adjust immediately and tighten bolt 3. Check the coaxiality of the coupling, measured in both horizontal and vertical directions should be in the range of 0.1-0.3MM. 4. Check the packing gland bolts or nuts are loose. If loose, tighten properly. 5. Check if the import and export closures are damaged. If damaged, check for foreign objects entering the pump. If you have to rule out. 6. Check whether the gear unit or transmission is refueling. If there is no immediate refueling. 7. Use aids to turn the drive shaft to hear if the pump is working properly. If there is "stuck" and different response immediately disassemble inspection, troubleshooting. Screw pump installation 1. Pump outlet from the obstacle distance of not less than 1.5 the length of the stator, and short tube connection, in order to repair. 2. Close to the pump import and export section, the laying of pipelines should try to avoid turning the right angle to increase resistance. Do need to turn right angle should be increased turning radius. 3. Pump leveling on the basis of the correct, the second grouting, until the intensity of secondary grouting up to 75%, tighten the anchor bolts. Pipeline installation 1. Import and export of pipe diameter and pump diameter should be basically the same import and export. 2. Pipe installation, you must strictly remove all the debris inside the pipe, especially welding slag. 3. Piping in the design, installation should avoid the phenomenon of suction, so that the pump body to retain a certain liquid medium. 4. The pipeline must have its own support, the pump can not withstand the pipeline gravity. 5. The flanges of the import and export pipelines must be sealed with gaskets so that the inlet pipe can not leak and the outlet pipe can not leak liquid. 6. The pressure of the outlet piping system, if transiently higher than the maximum pressure of the pump or a sudden power failure shutdown, the system pressure will cause the pump to reverse, you must install a check valve at the outlet of the pump. 7. Inlet pipe nozzle can not contact with the bottom of the pool, the effective height should be maintained within the range of 120-200MM, if the media of debris easily lead to the pump clogging, you should add a net cover in the suction port. Screw pump use and maintenance 1. The pump must be filled with clean water or liquid to be pumped into the pump for the first time and be "panned" with aids before it is energized to prevent "dry running" and "sticking" from damaging the stator. 2. Before starting the pump, all the valves in the inlet and outlet pipes must be opened, and all the valves in the inlet and outlet pipes can be closed after the pump is stopped. 3. Pump steering must be consistent with the mark on the pump, such as the need to reverse, you must swap the pump import and export. 4. Flow control can only regulate the return valve on the return pipe opening or screw speed, you can not rely on the degree of regulation of the pump outlet valve to adjust the degree of closure. 5. If the operation found suction, outlet pressure and flow down, indicating that the stator has worn, adjust the stator outside the screw, tighten the stator cavity, the pump can be normal operation. Adjustment, the feel of the hand by the hand - a tight degree of screw teeth together with the new pump is appropriate. 6. Always check around the bolts of the degree of tension, bearing temperature, is lack of oil, sealed condition, found that the problem immediately. 7. After transporting high viscosity, solid particles or corrosive media, the pump chamber must be cleaned immediately to prevent settling or corrosion. 8. Pumps in the alpine region after winter use, must be promptly cleaned, open the three leads below the Roses, drain the net liquid to prevent freezing damage. If the next use of the intermittent time is longer, you must indirectly heat the residual solvent in the melt pump (but not allowed to pass into the pump chamber). And use aids to turn a few revolutions before they can power start. 9. After the new pump is running for 300 hours, the bearing is changed to fresh oil, and after every 1500 hours of operation, the oil is changed again. After the new gearbox operation for 7-14 days for a new oil, after every 3-6 months for a change of oil. 10. If an abnormal situation occurs during operation, stop immediately to find out the cause and solve the problem.
