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Product overview:

The water supply pump of high-rise building is a vertical single suction multistage segmented centrifugal pump, which is used to transport clean water at room temperature and its physical and chemical properties are similar to that of clean water. LG series pumps are installed vertically. The motor shaft and pump shaft are connected by claw type coupling. The suction port is located on the pump base, and the discharge outlet is located on the rear section, arranged in a 180 ° horizontal direction. The suction port and discharge outlet can also be arranged in 0 °, 90 ° and 270 ° according to the needs of the lift. The pump stages can be selected according to the needs of the lift. It has the advantages of compact structure, low noise and small floor area. The main It can also be used in water supply and drainage of factories, mines, enterprises and low-pressure boiler.

 
The main parts of LG pump include: pump seat, middle section, rear section, impeller, guide vane sleeve, guide vane, rear guide vane, support, motor seat, shaft, bearing, shaft sleeve, seal ring, balance drum, balance drum sleeve, etc. (25lg, 32lg and 40lg pumps do not have balance drum and balance drum sleeve, but they are equipped with water seal ring, which is installed at the bottom of the packing chamber). The pump seat, middle section, rear section, impeller, guide vane sleeve, guide vane, rear guide vane, support, motor seat, shaft sleeve b and sealing ring are all made of cast iron. The pump shaft is made of high-quality alloy structural steel. The impeller, shaft sleeve b, balance drum are fixed on the shaft with keys and small round nuts to form rotor parts. The lower end of the shaft is equipped with shaft sleeve a to match with the sliding shaft sleeve. The upper end of the shaft is equipped with two angular contact ball bearings to support the rotor parts. The upper end of the pump shaft and the lower end of the motor shaft are connected by claw type coupling. The sealing device adopts soft packing seal and mechanical seal. When the soft packing is used for sealing, the shaft sleeve C friction with it is made of high-quality carbon steel and quenched to increase the surface abrasiveness. The impeller is made of cast iron. Due to the unequal pressure before and after the impeller, there must be axial force, most of which is borne by the balance drum. (25lg, 32lg and 40lg are assumed by the balance pipeline composed of water seal ring), the remaining small part of residual axial force is borne by two angular contact ball bearings at the upper end of the shaft, and the balance device composed of balance drum and balance drum sleeve can be replaced after wear. A sealing ring and an opening ring are respectively installed on the pump base and the middle section to reduce the leakage of high-pressure water back to the water inlet part, and the sealing ring can be replaced after being worn. The angular contact ball bearing at the upper end of the pump is lubricated with calcium base grease, and the sliding bearing (bearing bush) at the lower end is lubricated with the liquid delivered by the pump. The rotation direction of the pump is counterclockwise from the motor end.

Model meaning:
Product features:

1. Advanced hydraulic model: high efficiency and wide performance range

2. Less operation and maintenance costs: adopt high-quality mechanical seal, wear-resistant, no leakage, long service life, low failure rate, with less operation and maintenance costs.

3. Unique components and noise reduction: unique hydraulic components, good flow performance and maximum flow noise reduction.

4. Vertical structure, small floor area.

Working conditions:

The maximum working pressure of LG vertical multistage centrifugal pump system is 2.4Mpa, that is, the suction pressure + pump head ≤ 2.4mp, and the static pressure test pressure of the pump is 3.6mpa.

Please indicate the working pressure of the system when ordering. If the working pressure of the pump system exceeds 2.4Mpa, please indicate it when ordering, so as to design and manufacture separately.

Vertical multistage centrifugal pump can transport clean water ≤ 105 ℃ or other liquids with physical and chemical properties similar to clean water.

Application scope:

It is mainly used for water supply of high-rise buildings, as well as for water supply and drainage of factories and mines, enterprises and low-pressure boilers.

The shaft seal adopts packing or mechanical seal, the latter is the improved type of the former: made of stainless steel, titanium tungsten, fluororubber and other materials, with high temperature resistance, long service life, no leakage, no wear on the shaft, and clean working environment.

Impeller and rotating friction parts are made of alloy, corrosion-resistant and rust free. Meanwhile, it can avoid producing rust water, blocking spray and other fire-fighting devices, extending the service life of the pump.

Performance parameters:


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