Year1
- 功率：
- 3 4 5.5 7.5
- 流量：
- 6.2
- 扬程：
- 30-150
The D-type vertical multi-stage centrifugal pump is standard.
The D-type vertical multi-stage centrifugal pump is a new product developed by our company according to my country's regulations on water supply, drainage and fire protection in high-rise buildings. Since it adopts the hydraulic model of high-efficiency and energy-saving product pumps recommended by the country, the D-type pump has high efficiency and a wide range of performance to better meet the use requirements. The structure adopts vertical and segmented form, so it operates safely, stably, has a long life, occupies a small area, and is easy to install and maintain. This type of pump is particularly suitable for fire protection, domestic water supply, circulation of air conditioning units, and cooling water transportation in high- and low-rise buildings, hospitals, hotels, department stores, etc.
Product Overview of Vertical Multistage Centrifugal Pump
Type D. pump is a vertical single-suction multistage centrifugal pump used to transport clean water without solid particles and liquids with physical and chemical properties similar to water. It is mainly used for water supply in high-rise buildings and can also be used for water supply and drainage in factories and mines, and for transporting liquids. The flow range is .~/the head range is ～ and the matching power range is .～. The caliber range is ～.
Type D pumps are suitable for industrial and urban water supply and drainage, high-rise building pressurized water supply, fire pressurization, long-distance water supply, heating, bathrooms, boiler hot and cold water circulation pressurization, air conditioning and refrigeration system water supply and equipment matching, etc. The operating temperature of the medium of the D-type vertical multi-stage centrifugal pump does not exceed ℃. The operating temperature of the medium of the vertical multi-stage hot water centrifugal pump does not exceed ℃.
Model Series Speed Efficiency Flow Lift Power Weight
r /% /
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Vertical multi-stage centrifugal pump model meaning
For example: *
- Pump suction inlet diameter
Vertical Type multi-stage centrifugal pump
- Design flow rate (/)
- Single-stage head
- Number of stages
D-type vertical multi-stage centrifugal pump structure description:
D The pump is a vertical multi-stage structure. Use bolts to clamp the water inlet section, middle section, and water outlet section into one body. Each stage of the pump is equipped with an impeller and a water guide vane. The axial force balancing method of the pump resolves the residual axial forces by a ball bearing and is lubricated with grease. Shaft seals are available in two structures: soft packing or mechanical seal.
The main parts of the D pump are: water inlet section, middle section, water outlet section, motor base, impeller, guide vane, final guide vane, shaft, sleeve, sealing ring, upper bearing, lower bearing, gear sleeve, etc. .
The shaft material is steel, the bearing is made of copper, and the remaining parts are made of cast iron.
The shaft sleeve, upper and lower bearings, sealing ring, and impeller are vulnerable parts and should be replaced according to the degree of wear during maintenance.
The efficiency of a multi-stage centrifugal pump is the product of mechanical, volumetric and hydraulic efficiencies. The efficiency of the pump set is the product of the efficiency of the multi-stage centrifugal pump and the efficiency of the motor. The main factors causing the low efficiency of multi-stage centrifugal pump units are as follows.
． The efficiency of the multi-stage centrifugal pump itself is the most fundamental impact. Pump efficiency under the same working conditions may vary by more than %.
． The operating conditions of the centrifugal pump are lower than the rated operating conditions of the pump, resulting in low pump efficiency and high energy consumption.
． Motor efficiency remains essentially unchanged during use. Therefore, it is very important to choose a high-efficiency motor.
． The impact of mechanical efficiency is mainly related to design and manufacturing quality. After the pump is selected, the later management will have less impact.
． Hydraulic losses include hydraulic friction and local resistance losses. After the pump has been running for a certain period of time, it will inevitably cause surface wear of the impeller, guide vanes and other components, which will increase the hydraulic loss and reduce the hydraulic efficiency.
． The volume loss of multi-stage centrifugal pumps, also known as leakage losses, includes three types of leakage losses: impeller seal ring, interstage, and axial force balance mechanism. The level of volumetric efficiency is not only related to design and manufacturing, but also to post-management. After the pump has been running continuously for a certain period of time, the volumetric efficiency decreases due to the increase in the friction gap between the components.
． Due to blockage of the filter cylinder, air intake in the pipeline and other reasons, the centrifugal pump is evacuated and idling.
． Before starting the multi-stage centrifugal pump, employees do not pay attention to the basic preparatory work before starting the centrifugal pump, such as warm pump, disc pump, perfusion pump, etc. Incomplete implementation of the operating procedures often results in cavitation of the pump, causing loud noise and vibration of the pump. , low pump efficiency.
Factory address: Liying Industrial Park, Rencheng District, Jining, Shandong
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