NYP high viscosity pump installation, commissioning and working pressure of the selected
October 31, 2024
NYP High Viscosity Pumps Gear pumps that deliver high viscosity fluids should deliver the most flow at lower power consumption, less leakage, and greater pressure. In determining the media to be transported, it should strictly follow the provisions of the product manual, try to use the manufacturer recommended fluid medium, and pay attention to consider the system operating temperature range. When you want to use in a wide range of temperature, the viscosity of the conveying medium should be higher. The transport medium is not only an intermediary for energy transfer but also a lubricant, seal and heat transfer medium. High liquid viscosity will increase internal friction, reduce output power, waste energy, and produce high system temperature. High viscosity gear pump outlet pipe should also be set safety valve and other protective devices, so that once the pump outlet channel blockage , You can open the safety valve pressure relief. For the need for positive and negative high-viscosity pump, the import and export pipelines are required to set the safety valve. Hang Seng simply put NYP high-viscosity pump installation and pressure testing
1, installation and commissioning
High-viscosity gear pump bearings or flanges and its drive motor should be based on a common installation foundation, foundation, flange or bearings are required to have sufficient hardness to reduce vibration and noise generated 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. Before starting the operation, fill the housing of the gear pump with liquid to be transported for safe start-up. If the ambient temperature is below the freezing point, preheat the pump with heat steam beforehand and then start the gear pump. Gear pump rotation direction with the inlet and outlet ports. 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 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. For the need for positive and negative high viscosity gear pump, the import and export pipelines are required to set the safety valve.
2, the choice of working pressure
NYP high viscosity pump rated pressure refers to the maximum allowable pressure pump continuous work, and its working pressure is determined by the external load, the pump life and its working pressure is directly related. For infrequent work gear pump, the working pressure can be taken as the rated pressure of the pump, taking into account the different product quality, it is best to reduce the rated pressure of 20% to 30%. For the gear pump that often works under higher pressure, the working pressure should be 1 ~ 2 pressure levels lower than the rated pressure of the pump. Petrochemical equipment is often 24 hours continuous operation, when the pump working pressure should be made much lower than the rated pressure, and working speed should be lower than the rated speed. If the high viscosity gear pump working pressure is adjusted too high, it will make the gear pump in overload operation.
