Advantages of Vertical Self-Priming Pumps in Low-Level Transport of Corrosive Liquids In general, when a centrifugal pump is delivering liquid, when the liquid level is lower than that, it is necessary to fill the pump to discharge the water. To do this, install a foot valve at the pump inlet. Over time, the bottom valve is corroded or stuck, and it needs to be exchanged or repaired, so it is inconvenient to use. Submersible pumps are generally used to transport clear water and river water, and in the case of acid-alkali and other corrosive liquids, they are prone to motor erosion and leakage, which is unsafe. When the pump is clogged with garbage, the pump must be pulled up to clean it, which is inconvenient. Therefore, it is rarely used in practical applications. So people created a submerged pump to carry out the low level transport, and the submerged pump solved the problem of low transport. However, due to the use of a long shaft, combined with an unbalanced radial force of the impeller, the entire shaft is also a cantilever structure, which results in a large deflection at the impeller end during rotation. The longer the shaft, the greater the deflection. In order to solve this problem, bearings are installed on the shaft. However, because the entire shaft is a flexible shaft, the bearing is constantly subjected to unilateral wear, the amount of wear is large, the bearing shakes violently, and the wear rate is accelerated, so the liquid pump has a high frequency of damage. And the axis should not be made too long, generally within 2 meters. The bearing of the submerged pump is cooled and lubricated by the medium conveyed by the pump. If the pumped medium is not refrigerated but lubricated (this happens when the pump is empty and when the inlet is clogged with debris), burning of tiles or even burning of the motor can occur. The repair and installation of the submerged pump is very troublesome. Especially when transporting corrosive media, it is difficult to complete without lifting tools.
In summary, the submerged pump solves the problem of low transport, but it also brings many troubles in use. Shanghai Ligong Pump Co., Ltd. introduces a patented vertical self-priming pump produced by foreign advanced technology. It is designed for the low-level liquid delivery, aiming at the above-mentioned disadvantages of the submerged pump. It can replace the long-axis submerged pump on the ground, and the self-priming height can reach 8 meters. It can be used as the bilge pump and stripping pump on the ship. One: Advantages of alternative liquid pump:
1. The pump has a vertical structure. Compared with the submerged pump with the same parameters, the weight is greatly reduced and the area is also small. As the shaft is installed in the vertical direction, the shaft seal is not easy to leak.
2. The long axis has been cancelled by the self-suction pump. At the same time, the problem of the bearing has been eliminated, the maintenance period has been greatly extended, and the vibration has also been reduced.
3. Parts that may be damaged and need to be repaired are all on the ground, which brings great convenience to maintenance. The pump inlet is only a hollow tube and does not require a bottom valve. If the inlet is clogged with waste, the hollow tube can be pulled out, while the submerged pump requires the entire pump to be lifted.
4, the liquid pump at the time of purchase need to determine the pumping depth, if the liquid depth and pump shaft length does not match, you need to change the pump, and vertical self-priming pump with different lengths of hollow tubes, you can pump different depths There is no need to exchange itself.
5, the air pump operation can still be maintained for a long period of time, in order to facilitate the detection and take measures to prevent damage to the motor, reduce the loss caused by misuse, safety is good.
6. The submerged pump must be installed directly above the liquid. The self-priming pump can be installed at the top or it can be installed next to it. Even vacuum resistant hoses can be used to draw liquids that cannot be reached by the straight pipe, and the mobility is very strong.
II: Saving investment: Due to the frequent maintenance of submerged pumps, generally one pool (tank) needs two pumps, one pump for maintenance, huge investment, large maintenance. The self-priming pump can realize multi-pool (slot) string and parallel sharing of a pump, saving investment. Self-priming pump can be used for gas and liquid intermittent operation, not afraid of pumping, can save some intermediate equipment in the process, such as high or low slot, greatly simplifies the process, you really save money.
III: The principle and application of the vertical self-priming centrifugal pump: The principle of the self-priming pump adopts the unique patented impeller and separation disc to force the gas-liquid separation to complete the inhalation process. Its shape, size, weight and efficiency are similar to those of the pipeline pump. Vertical self-priming pumps do not require auxiliary equipment such as bottom valves, vacuum valves, and gas separators. The normal production starts without need of liquid filling and has a strong self-priming ability, which can replace the currently widely used submerged pump (low liquid transfer pump) and can be used as auxiliary equipment such as separators. The normal production starts without filling, and has strong self-absorption capacity, which can replace the currently widely used submerged pump (low liquid transfer pump), can be used as circulation pump, tanker transfer pump, self-priming pipeline pump, motorized pump Other uses.
Four: Material: reinforced polypropylene, steel lining, F46, PVDF, cast steel, stainless steel, 304, 316, 316L, 904L (UB6), and duplex stainless steel.
Five: Vertical self-priming centrifugal pumps have been applied in many occasions. Units that have been operating for three consecutive years without faults and maintenance records (including mechanical seals) include Sichuan Yinshan Chemical Group (ammonium phosphate) and Sichuan Neijiang Power Generation Co., Ltd. Plant, Yunnan Huize lead-zinc mine, Qingdao Luda Company, Qilu Petrochemical, Suzhou Resin Factory, Shanghai Chlor-alkali Chemical Plant, Shanghai Fuhai Wood and other nearly 100 companies.
In summary, the submerged pump solves the problem of low transport, but it also brings many troubles in use. Shanghai Ligong Pump Co., Ltd. introduces a patented vertical self-priming pump produced by foreign advanced technology. It is designed for the low-level liquid delivery, aiming at the above-mentioned disadvantages of the submerged pump. It can replace the long-axis submerged pump on the ground, and the self-priming height can reach 8 meters. It can be used as the bilge pump and stripping pump on the ship. One: Advantages of alternative liquid pump:
1. The pump has a vertical structure. Compared with the submerged pump with the same parameters, the weight is greatly reduced and the area is also small. As the shaft is installed in the vertical direction, the shaft seal is not easy to leak.
2. The long axis has been cancelled by the self-suction pump. At the same time, the problem of the bearing has been eliminated, the maintenance period has been greatly extended, and the vibration has also been reduced.
3. Parts that may be damaged and need to be repaired are all on the ground, which brings great convenience to maintenance. The pump inlet is only a hollow tube and does not require a bottom valve. If the inlet is clogged with waste, the hollow tube can be pulled out, while the submerged pump requires the entire pump to be lifted.
4, the liquid pump at the time of purchase need to determine the pumping depth, if the liquid depth and pump shaft length does not match, you need to change the pump, and vertical self-priming pump with different lengths of hollow tubes, you can pump different depths There is no need to exchange itself.
5, the air pump operation can still be maintained for a long period of time, in order to facilitate the detection and take measures to prevent damage to the motor, reduce the loss caused by misuse, safety is good.
6. The submerged pump must be installed directly above the liquid. The self-priming pump can be installed at the top or it can be installed next to it. Even vacuum resistant hoses can be used to draw liquids that cannot be reached by the straight pipe, and the mobility is very strong.
II: Saving investment: Due to the frequent maintenance of submerged pumps, generally one pool (tank) needs two pumps, one pump for maintenance, huge investment, large maintenance. The self-priming pump can realize multi-pool (slot) string and parallel sharing of a pump, saving investment. Self-priming pump can be used for gas and liquid intermittent operation, not afraid of pumping, can save some intermediate equipment in the process, such as high or low slot, greatly simplifies the process, you really save money.
III: The principle and application of the vertical self-priming centrifugal pump: The principle of the self-priming pump adopts the unique patented impeller and separation disc to force the gas-liquid separation to complete the inhalation process. Its shape, size, weight and efficiency are similar to those of the pipeline pump. Vertical self-priming pumps do not require auxiliary equipment such as bottom valves, vacuum valves, and gas separators. The normal production starts without need of liquid filling and has a strong self-priming ability, which can replace the currently widely used submerged pump (low liquid transfer pump) and can be used as auxiliary equipment such as separators. The normal production starts without filling, and has strong self-absorption capacity, which can replace the currently widely used submerged pump (low liquid transfer pump), can be used as circulation pump, tanker transfer pump, self-priming pipeline pump, motorized pump Other uses.
Four: Material: reinforced polypropylene, steel lining, F46, PVDF, cast steel, stainless steel, 304, 316, 316L, 904L (UB6), and duplex stainless steel.
Five: Vertical self-priming centrifugal pumps have been applied in many occasions. Units that have been operating for three consecutive years without faults and maintenance records (including mechanical seals) include Sichuan Yinshan Chemical Group (ammonium phosphate) and Sichuan Neijiang Power Generation Co., Ltd. Plant, Yunnan Huize lead-zinc mine, Qingdao Luda Company, Qilu Petrochemical, Suzhou Resin Factory, Shanghai Chlor-alkali Chemical Plant, Shanghai Fuhai Wood and other nearly 100 companies.
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