High viscosity pump installation and commissioning

High viscosity pump before starting operation, to the gear pump filled with liquid to be transported within the housing, for safe start. If the ambient temperature is below the freezing point, preheat the pump with heat steam beforehand and then start the gear pump. The direction of rotation of high-viscosity pump with inlet and outlet port line. If the first gear pump operation, or long-term idle after use, it is best to run at no-load or light load first about an hour. If abnormal temperature rise, leakage, vibration and noise are detected in advance during running-in, the machine should be shut down for inspection. High-viscosity gear pump bearings or flanges and its drive motor should be installed on a common basis, foundation, flange or bearings are required to have sufficient rigidity to reduce vibration and noise generated when the gear pump operation. Motor and gear pump shall be connected with flexible coupling, concentricity less than 0.1 mm, the angle of inclination shall not be greater than 1 degree. Do not use hammer hammer when installing the coupling, so as to avoid damage to gear pump gear and other parts. If the pulley, sprocket and other drive support bracket should be set to prevent the driving gear bearing radial force. Tighten the gear pump, motor ground screw, the screw force should be uniform, reliable connection. Turn the coupling by hand, should feel the gear pump can easily rotate, there is no clamping and other anomalies, and then can be piping. High-viscosity gear pump suction pipe diameter should be large enough and to avoid narrow passage or sharp turn, reduce elbows, remove unnecessary valves, accessories, as far as possible to reduce the pump installation height, shorten the length of the suction pipe to reduce the pressure loss. Pipe joints and other components of the seal should be good to prevent air intrusion, thereby controlling the occurrence of cavitation and cavitation. Check Valve and Safety Valve It is advisable to install a check valve on the output line of the gear pump. In this way, when repairing the pump and the output pipe, the liquid in the system will not flow backwards. Gear pump with a load of parking, but also prevent the pump reversing and produce a partial vacuum in its output pipe. It should be noted that the outlet check valve can not be installed anti-jamming phenomenon or appear. High viscosity gear pump outlet pipe should also be set safety valves and other protective devices, so once the pump outlet channel blockage, you can open the relief valve relief. The safety valve can be cast in one piece with the pump body or pump head and can also be assembled separately. For the need for positive and negative high viscosity gear pump, the import and export pipelines are required to set the safety valve.