Introduction
Multistage centrifugal pump is to have the same function of more than two centrifugal pumps together, the structure of the fluid channel, the performance of the first level of the media pressure relief port and the second level of the import communication, the second level of media leakage Pressure port is connected with the third level of imports, so the series of institutions formed a multi-stage centrifugal pump.Adopted the national recommended energy-efficient hydraulic model, with high efficiency and energy saving, wide range of performance, safe and stable operation, low noise, long life, easy installation and maintenance; By changing the pump material, sealed form and increase the cooling system can be transported Hot water, oil, corrosive and abrasive media.
LDLA, LDWA series consists of vertical two horizontal series for conveying temperature ≤ 80 ºC water and physical and chemical properties similar to clear liquid.Adapt to mine and urban water supply and drainage projects.
Application
LDLA/LDWA series is suitable for conveying clean water with temperature not more than 80 ºC and liquid with physical and chemical properties similar to clear water.Municipal water supply and booster, industrial and mining enterprises water supply, domestic water supply, air conditioning, cooling system cooling water supply system, fire sprinkler system water supply, boiler water supply and condensing systems
Structure Description
1, LDLA Vertical Multistage Centrifugal Pump and LDWA Horizontal Multistage Centrifugal Pump are vertical and horizontal dual-purpose pumps which are common to most parts, and the relative positions of inlet and outlet can be composed according to the requirements of users' installation and installation drawings Various directions.
2, the two types of pumps are rigid coupling, impeller shaft and motor shaft directly. The pump uses adjustable wear-resistant packing seal or user requirements with mechanical seal sealed two forms, to remove and replace the mechanical seal, just remove the motor and coupling, you can easily replace and check.
3, to meet the hydraulic performance and anti-cavitation performance requirements, the series of products through computer-aided design, the first impeller and the secondary impeller, guide vane to better meet the requirements of high efficiency, good anti-cavitation performance, but also to energy Each impeller is evenly distributed. The material of the impeller is two kinds of high-strength cast iron and wear-resistant cast bronze. The impeller can balance its own axial force.
4, into the water section, the middle section, the water section are high-strength cast iron, with the O-ring seal at the face seal, and by tightening the bolt tension to achieve the sealing effect.
Features
1, multi-stage centrifugal pump for the vertical structure, with a small footprint, pump center of gravity coincident with the center of the pump, which runs smoothly, small vibration, long life.
2, multi-level centrifugal pump diameter and the same horizontal centerline, without changing the pipeline structure, can be directly installed in any part of the pipeline, the installation is extremely convenient.
3, the motor plus rain cover can be placed directly in the outdoor use, without the need to build pump room, greatly saving capital investment.
4, multi-stage centrifugal pump head can be changed by pump series (number of impeller) to meet different requirements, it is applicable to a wide range.
Multi-stage centrifugal pump structure
Multi-stage centrifugal pump structure
5, the shaft seal with carbide mechanical seal, reliable seal, no leakage, mechanical loss.
6, energy efficient, beautiful appearance.
7, Note 50 caliber inner casting above forming.
Implementation standards
Collapse national standards:
"Centrifugal pump technical conditions ()" GB / T16907-1997
"Centrifugal pump technical conditions ( class)" GB / T5656-1994
"Centrifugal pump technical conditions (Class )" GB / T5657-1995
"Determination of pump flow method" GB / T3214-91
"Centrifugal pump efficiency" GB / T13007-1991
"Centrifugal pumps, axial flow pump conditions" GB / T13009-91
"Centrifugal pump, mixed flow pump, axial flow pump and scroll pump test method" GB3216-89
"Centrifugal pump, mixed flow pump and axial flow pump hydraulic performance test specification precision class" GB / T18149-2000
"Centrifugal pumps, mixed flow pumps and axial flow pump NPSH" GB / T13006-1991
Collapse industry standards:
"Small multistage centrifugal pump type and basic parameters" JB / T6435.1-92
"Small multistage centrifugal pump technical conditions" JB / T6435.1-92
Engineering standards:
"Building Water Supply and Drainage and Construction Quality Acceptance Code" GB50242-2002
"Building Water Supply and Drainage Design Code" GB50015-2003
Attributes
| Discharge diameter: | 40-80 (mm) | Lift: | 5-250 (m) |
| Inlet diameter: | 50-100 (mm) | Impeller Structure: | Closed Impeller |
| Structure Principle: | Jet Pump | Impeller Number: | 1 |
| Shaft position: | Side vertical | Material: | cast iron |
| Impeller Inhalation: | Single suction | Model: | LVP (LHP) Series Multistage Centrifugal Pump |
| Flow: | 3.6-150 (m3 / h) | NPSH: | 2.5-7 (m) |
| Uses: | Pipeline pump shaft | power: | 0.37-90 (kW) |
| Performance: | Frequency | Attributes: | Industrial |
Performance parameters
| Q=4.9~216m³/h | H=18~230m |
| n=1480/2950 r/min | P=0.37~90kw |
| Dna=50~100mm | DNm=40~80mm |
| Pump inlet maximum working pressure≤1.0Mpa | Pump maximum working pressure≤3.0Mpa |
Maintenance
Cleaning items
First, scrape the inner and outer surface of the impeller and seals and bearings and other places accumulated scale and rust and other objects, and then water or compressed air cleaning, blowing clean.
Second, clean the housing surface of the joint accumulation of grease and rust.
Third, clean the water seal tube and check the tube is smooth.
Fourth, clean bearings and bearings, remove grease, and then wash the oil ring and oil surface meter. Ball bearing application of gasoline cleaning.
Fifth, temporary zero assembly, parts, after cleaning should be oiled protection.
Fundamentals of folding and cleaning
1, to ensure that meet the requirements of the degree of cleanliness of parts, in the repair, a variety of mechanical parts, the degree of cleanliness requirements are not the same. In the assembly, the cleaning requirements of the mating parts are higher than those of the non-matching parts, the moving parts are higher than the static parts, and the precision parts are higher than the non-precision parts. For spray, plating, bonding the surface of the workpiece, the cleaning requirements are high. Cleaning must be based on different requirements, take a different cleaning agent and cleaning
Method to ensure the required cleaning quality.
2, to prevent corrosion of parts, precision parts do not allow any degree of corrosion. When the parts to be parked for some time after cleaning, should consider the antirust ability of cleaning fluid or consider other anti-rust measures.
3, to ensure safe operation, to prevent fire or poison the human body and cause environmental pollution.
Package
Liansheng Team
A professional team
A dedicated team
A service team
LianSheng development team adhering to the "source of drinking water, sincere feedback," the sense of service to meet the various business water treatment, providing customers with quality products and services.
Enterprise Honor
LianSheng adhere to only Ldla Multistage Vertical Centrifugal Pumps on safety, intentions to do a good job in the pump, Liansheng people with a dedicated attitude, secure products get a piece of positive.
tive.
Enterprise Introduct
Shanghai Liansheng Pump Manufacturing Co., Ltd. (ShanghaiLiansheng Pump Factory), established in the sixties, is a well-known large-scale water supply and drainage equipment manufacturing enterprises. Professional research and development, manufacturing, testing, identification, sales services, such as advanced "Lian Sheng" brand pump (fire pump), electrical (frequency) automation and control of water supply complete sets of equipment, products widely used in cities, mines, chemical industry, boiler, air-conditioning, fire water supply and drainage and other industries as well as guesthouses, hotels, buildings, tourism, entertainment and other fields of engineering applications. Development of Pump-ShengLin was one of the first through the ISO9001: 2000 domestic and international quality system certification, and China Pump Industry Association, Shanghai Trademark Association, Shanghai advanced enterprises, the Chinese brand-name products for the corporate image maintenance guidelines, to create a another excellent product results. Products in ShanghaiWe hold true to the "WTO door step, take the road to go abroad, " the faith, will be brand new and quality products and services to the world around.
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