, LG vertical multistage centrifugal pump Product Overview: 

 LG-type vertical multistage centrifugal pump for the transport of the room temperature water and the physical and chemical properties similar to water in the liquid. LG Series pumps for vertical installation, motor shaft and pump shaft connection through Jaw Couplings, with a compact, low noise, small footprint advantages, mainly used in high-rise building water supply can also be used in factories, mines, enterprises water supply drainage and low pressure boiler water recycling. 
 LG-type vertical multistage centrifugal pump products the execution JBT2727-93 vertical multi-level simple type of centrifugal pump types and basic parameters of the Standard, its inhalation, and outlet are located in the water segment. Rotor components from the shaft, impeller, impeller gear, bushings and other parts, the water segment, the middle of the water segment, tighten bolts links. Seal with soft packing seal or mechanical seal, balance the pressure on water for lubrication and cooling. The multistage centrifugal pump due to the excellent hydraulic model of energy-efficient, high efficiency, wide range of performance advantages, and better meet the requirements of users. In addition, the multi-stage centrifugal pumps used in the structure of a vertical, segmented form of operational safety, smooth, long life, small footprint, easy installation and maintenance. 

 LG-type vertical multistage centrifugal pump is under the constant pressure water supply of high-rise building and fire industry need to develop the new generation to the aquatic products. Excellent hydraulic model of the pump, high efficiency, stable performance, low noise, long life, good looks, small footprint, easy maintenance, light weight advantages. LG-B type pump with clip from the motor and pump shaft and motor shaft coupling connection of the shell history to ensure that the pump and motor is absolutely coaxial pump runs smoothly, low noise phenomenon. For the Y-shaped three-phase induction motor to facilitate support to replace the motor, is the machine for the rigid connection, when used without correction, seal, mechanical seals, pumps for the demolition of the structure to facilitate the replacement of mechanical seals. 

 Second, the LG vertical multistage centrifugal pump features: 

 1, compact structure, small size, less area. 
 2, the replacement of wearing parts (mechanical seal), that is, "will be demolished," do not need to remove the motor. 
 3, the assembly without adjustment, disassembling and maintenance. 
 4, radial force, axial force is balanced by hydraulic bearing combination. 
 Noise, small vibration, smooth operation. 
 The six main wear parts are made of high-quality wear-resistant materials. 
 7, the same model can be equipped with ordinary motor. 
 8, the mechanical seal of special design, good sealing, enhanced life expectancy. 
 9, using the hot water type-specific mechanical seal to pump hot water. 
 LG-type vertical sectional multistage centrifugal pump uses the temperature below 80 ℃, flow :5-150m3h The head :20-120m speed 2900rmin 

 Third, the structure of the LG-type vertical multistage centrifugal pump: 

 , Multistage pump vertical multistage structure with bolts to the water segment, the middle, the water segment fastening into one multi-stage centrifugal pump an impeller mounted to each stage and the guide vanes, the axial force hydraulic balance, the residual axial force from one or a pair of ball bearing; 
 2, seal with a specially designed mechanical seal, such Xu demolition of mechanical seals, without removing the motor, sandwiched between the coupling to take out the sealing element, with the advantages of a replacement, maintenance 
 3, the transmission of multi-stage centrifugal pumps Vertical motor-driven clamp coupling, looking from the motor, pump rotation is clockwise; 
 4, the multi-stage centrifugal pump suction below the outlet at the top, its relative position in accordance with the requirements of the user to select 0 °, 90 °, 180 °, 270 ° out of the factory. General pump factory at 180 °. 
 5, the assembly without having to adjust, easy accessibility; 
 6, the motor can be equipped with the standard Y series ordinary models. 

 Fourth, the LG-type vertical multistage centrifugal pump working conditions: 

 1, multi-stage centrifugal pump can transport water or physical and chemical properties similar non-corrosive medium and water, solid insoluble volume does not exceed 0.1% of unit volume, such as the medium with small particles in when placing an order; 
 2, medium temperature: -15 ℃ - +120 ℃ 
 3, the maximum system working pressure greater than 2.5MPa; 
 4, the ambient temperature should be low, and 40 ° C, relative humidity less than 95% the LG vertical multistage centrifugal pump 

 Five, LG Vertical multistage centrifugal pump main purposes: 

 LG-type vertical multistage centrifugal pump for high-rise building domestic water, fire water of the high-rise buildings, factories, mines, enterprises water, drainage, low pressure boiler water recycling. Medium temperature 0 ° C ~ 80 ° C transport clean water or physical properties similar to liquid water. 

 Sixth, the LG-type vertical multistage centrifugal pump model justice: 

 For example: 100LG-B (R), 72-206 
 100 - The pump inlet diameter (mm) 
 The demolition of the structure of the LG-B-vertical multistage pump 
 R-Hot Water 
 72 - The flow of the design point (m3h) 
 20 - design point 
 6 - pump series 

 7, the structure of the LG-type vertical multistage centrifugal pump: 

 LG-type vertical multistage centrifugal pump for the vertical structure, the suction in the pump base, the outlet is located on, showing the layout of the horizontal direction of 180 °, according to the needs of the inlet and outlet was 0 °, 90 °, 270 ° arrangement, the pump can be selected according to the needs of Head of progression. 
 The main parts of the LG-type pump: pump seat, the middle, the posterior segment, impellers, guide vanes sets of guide vanes, after the guide vanes, bearings, motor base, shaft, bearings, bushings, seal rings, balance drum and balanced drum covers. (25LG, three kinds of pumps 32LG and 40LG balance drum and balanced drum sets, equipped with water seal ring mounted on the bottom of the packing chamber). Pump seat, the middle of the posterior segment, impellers, guide vanes, guide vanes, after the guide leaves, bearing, motor base, sleeve B, sealing rings are made of cast iron. 
 LG-type vertical multistage centrifugal pump shaft is made of quality alloy steel, the middle of the impeller, sleeve B, balance drums, keys and small round nut fixed on the shaft rotor parts, equipped with the lower end of the shaft sleeve A compatible with the sliding sleeve, the upper end of the shaft is equipped with two angular contact ball bearings, in order to support the rotor components, the top and the bottom of the motor shaft of the shaft connection through Jaw Couplings. 
 Seals soft packing seal and mechanical seal. Soft packing seal with the sleeve of the friction C for high-quality carbon steel, and the quenching process, in order to increase the surface grinding. 
 Impeller made of cast iron, pressure ranging from around the impeller, there is bound to the axial force, the vast majority of this axial force borne by the balancing drum. (25LG, 32LG and 40LG formed by the water seal ring balance pipeline commitments), the remaining small portion of the residual axial force from the shaft end of the two angular contact ball bearings to withstand the balancing device consisting of balance drum and balanced drum sets can be replaced after wear. 
 The middle seat in the pump, were fitted with a sealing ring and the Sandy Bay, to reduce the leakage back to the water part of the high-pressure water, replace the sealing ring wear. 
 Pump the top of the angular contact ball bearing slide with calcium-based grease, and the bottom of the sliding bearing (bearing) to pump liquid lubrication, the direction of rotation of the pump from motor rotation is counterclockwise.