Pump selection and maintenance

Posted by uuuseff on November 19th, 2019

Selection of pumps used to prepare the combination of topography. Lift in the following 5 meters to the preferred axial flow pump as well; Head in 5-10 meters, should be preferred mixed flow better head lift more than 10 meters, priority centrifugal pumps can be used; if high lift, you should choose Multi-stage centrifugal pump or multi-stage pump to raise water level by level. At the same time supporting power and pump rated power to match. Install the pump base to be solid, and try to shorten the length of the suction pipe. Water inlet pipe should be sealed and reliable. Bottom valve and hose with safety rope fasten. Water sources for the channel, the bottom valve should be higher than the bottom of 0.5 meters, and screening to prevent debris into the pump. In the pump belt drive, the tight side of the belt should be in order to improve transmission efficiency. Pump impeller steering should be consistent with the direction of the arrow. Installation of pumps and power machinery should be firm and stable. To be parallel to the pump shaft and power shaft, the installation of the belt, should pay attention to the loose belt to be above. New purchase of machinery to start pumping, wipe the pump and other parts of the protective oil. Carefully check the connection of each component is solid, water hose leaks, leaks and so on. If there are problems should be promptly repaired. With the motor driven pump pumping, two pumps are prohibited at the same time start the homework to prevent the entire line current is too large and burn the motor, resulting in undue economic losses. Maintenance of new pumps, usually after 100 hours of operation to be replaced grease (oil), every 500 hours after the replacement. Pump stop pumping, you must first close the pressure valve, and then stop, remove the belt. When the machine stops for a long time, it is necessary to clean up the whole machine, put the water inside the pump completely, put some protective oil on the parts and parts that are easy to rust on the machine, so as to prevent the pump from rusting. Repair pump does not absorb or drain, can take repair bottom valve, remove the blockage, correct steering, cleaning impeller and other measures. Pipeline leakage or leakage, leakage or leaks can be painted in place of cement, or painted with asphalt mixing of cement slurry. Temporary repair can be painted wet mud or soft soap. If the joint leaks, you can use a wrench to tighten the nut, if the water leakage must be re-disassembly. Severe vibration pump, to adjust, repair, reinforcement, straightening, replacement and so on.

At present, the bottleneck and disadvantage of large scale development and manufacturing of isotropic Graphite in China still exist: the design and manufacture of large, special cold and other static presses have not kept up with it. (2) other facilities not perfect, such as the large and super large (1200 mm) Φ graphite impregnated, roasting, graphitization, purification processing, special machine tools machining must be perfect.

Fortunately, there are now cold and other static press factory to start to design and manufacture the large specification (1200mm) cold isostatic pressing machine, if the successful two years can be put into production. At the same time, the development of large scale homogenated graphite is also used in the development of vibration-forming graphite, carbon/carbon composite materials, carbon fiber and other materials used in silicon crystal production.

In the face of such a huge graphite market prospect, and graphite profound understanding to the graphite pieces processing technology progress is the precondition that the future market share, the graphite with milling, car, plane, cutting, drilling, grinding and CNC (CNC), main products including graphite, graphite mold, such as thermal field static pressure graphite, High Purity Graphite, EDM graphite, graphite crucible, graphite flake, Graphite Powder for the SPD, all kinds of graphite profiled, etc., products are now widely used in solar photovoltaic (pv), mold, electronic semiconductor, electrical discharge machining, metallurgy, chemical industry, nuclear industry and quartz, etc. We hope to cooperate with you and develop together with you in the future.

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