Efficient Centrifugal High Lift Booster Pump for Industrial Water Supply

• Customization: Available
• After-sales Service: Online After-Sale Service
• Warranty: 12 Months
• Model NO.: SHDG85-45/8
• Max.Head: >150m
• Max.Capacity: >400 L/min
• Driving Type: Motor
• Impeller Number: Multistage Pump
• Working Pressure: High Pressure Pump
• Influent Type of Impeller: Single Suction Pump
• Position of Pump Shaft: Horizontal Pump
• Pump Casing Combined: Verticaljoint Surface Pump
• Mounting Height: Suction Centrifugal
• Impeller: Closed
• Usage: Pump, Pumps, Condensate Pump, Circulating Pump
• Material: Cast Iron, Cast Steel, Stainless Steel, Bronze
• Seal Type: Mechanical Sea or Packing Gland Seal
• Coupling: Flexible Pins/Disc
• Driver: Electric Motor/Diesel Engine
• Transport Package: Plywood Case
• Specification: 2200*900*1500mm
• Trademark: SEMHAI or OEM
• Origin: China
• HS Code: 8413709990
• Production Capacity: 1000000sets/Year

Product Description

Product Description

The SHD and SHDG models are meticulously engineered single-suction, multistage, segmental-type centrifugal pumps. Ideal for transporting water or fluids with similar physical and chemical properties, these pumps are crafted without solid particles. The SHD pump efficiently manages fluids with temperatures below 80 ºC, perfectly suited for applications in mines, factories, and urban drainage systems. Meanwhile, the SHDG pump excels at handling fluids up to 105 ºC, making it an indispensable choice for boiler feed operations, hot water transportation, and analogous scenarios.

Design and Build Features
The SHD and SHDG pumps are masterfully constructed from four primary components: stator, rotor, bearings, and shaft seal—each contributing to their unparalleled performance.
1. Stator Segment: This section is intricately composed of intake, middle, discharge sections, and guide vanes, all held together securely with tension bolts. Notably, the SHD-type pump features a horizontal inlet and a vertical outlet, whereas the SHDG model boasts both vertical inlet and outlet configurations, optimizing fluid dynamics.
2. Rotor Assembly: Central to the pump's function, this segment includes the shaft, impeller, balance plate, and bushings. The shaft is responsible for transferring energy to the impeller, while the balance plate adeptly manages axial forces. For enhanced durability, both shaft ends are protected with replaceable sleeves.
3. Bearing Systems: The pump is equipped with two types of bearings—rolling and sliding—ensuring smooth operation and longevity:
Sliding bearings comprise the bearing body, caps, dust disk, oil level gauge, and rejection mooring rings, all lubricated with thick oil for robust performance. Rolling bearings consist of the main body, bearings, and gland, utilizing grease lubrication for optimal efficiency.
4. Shaft Sealing Mechanism: Choose between mechanical or packing seals, featuring components such as water segments and filler bodies, finalized with retaining rings at the housing's tail. The seal chamber fluid facilitates water sealing, cooling, and lubrication. The SHD pump's seal water derives from the pump's internal pressure, while the SHDG uses external cooling and normal temperature water. Seal water pressure should exceed the seal chamber by 0.05-0.1MPa, and cooling water should maintain 0.15-0.3MPa pressure.

Additionally, the pump is directly propelled by a prime motor via a flexible coupling, ensuring precision. It operates in a clockwise rotation when viewed from the prime motor end for seamless integration into your systems.

Versatility is key; the SHD and SHDG centrifugal booster pumps can be powered by either an electric motor or diesel engine, catering to diverse operational needs.

Detailed Photos

In the realm of multistage centrifugal pumps, significant thrust arises due to impellers all facing in a singular direction. To counteract this force, a sophisticated thrust balance device—either a balance disc or balance drum—is employed. This mechanism meticulously moderates the thrust, ensuring it is contained within the manageable limits of a standard-sized thrust bearing, thus safeguarding operational efficiency and longevity.
Our impellers are crafted from a selection of premium materials, including cast iron, cast steel, stainless steel, and bronze, offering a diverse choice for durability and performance.

Advanced Flexible Couplings
Flexible couplings offer a remarkable advantage over their rigid counterparts by allowing for slight movements such as vibrations and thermal expansion without sustaining damage. This makes them ideal for scenarios where there's slight inevitable misalignment between the drive and pump shafts. Not only do they adeptly absorb vibrations, but they also significantly reduce operating noise. While they entail a more complex and costly design, the investment pays off as they extend the life of shafts and bearings by preventing damage and premature wear, leading to savings on maintenance over the long term.
We specialize in using durable wear-resisting disc coupling or pin coupling, ensuring reliable performance.

Packing seals have long been the go-to sealing solution, utilizing rope-like materials that encircle the pump shaft, effectively filling voids and curbing fluid loss. However, as time marches on, the wear on gland packing materials can escalate fluid loss, hinder regular lubrication, and pose challenges to ease-of-replacement, impacting overall operational efficacy.

Mechanical seals are increasingly favored over traditional packing seals in a wide range of applications where leakage is a critical concern. These seals are engineered for superior durability, embracing robust construction that can withstand significant operational stress. Basic mechanical seals employ multiple sealing points, which are instrumental in virtually eliminating leakage concerns, offering peace of mind and enhanced reliability.

Product Parameters

Flow rate	6-1000m3/hr
Head rate	25-650m
Speed	1450-2900rpm
Medium temperature	0-105 ºC
Diameter	40-350mm

Product Application

Our Efficient Centrifugal High Lift Booster Pump is a pivotal component in pressure boosting systems, expertly engineered to provide a reliable and consistent flow and pressure. Often indispensable in a range of scenarios, these pumps are the ideal choice for projects requiring robust solutions, such as:
Mine dewatering - ensuring smooth operations in challenging environments.
High density living - supporting water supply systems in urban areas with precision.
Snow making - facilitating artificial snow in recreational areas.
Boiler feed systems - enhancing the efficiency and reliability of industrial heating processes.
Reverse Osmosis - crucial in water purification systems for clean and safe water.
Industrial applications - meeting the rigorous demands of industrial processes with unmatched reliability.
Condensate - managing condensate systems to prevent inefficiencies.
High pressure cleaning/wash down facilities - delivering the high-pressure performance needed for thorough cleaning operations.
Jacking pumps for fire hydrant systems - providing essential support in emergency water systems.
Irrigation and fire hose feel supply - ensuring consistent water supply for agriculture and emergency scenarios.
Showers - meeting high demand with steadfast performance in domestic and commercial settings.
Co generation - optimizing energy systems with seamless integration and efficiency.
Spray - tailored for applications requiring precise and uniform distribution of water or other fluids.
Pressure Boosting - the cornerstone of systems demanding sustained pressure and flow integrity.

Facilities & Equipments

FAQ

A. What are the multi stage pump parts?
The multistage pump parts are very similar to those of the standard Centrifugal pump except for the Multistage Centrifugal pump where the additional parts are diffusers which efficiently channel the fluid into the eye of the impeller or to the following stage. In the side channel pump, there are intermediate plates with the scalloped side channel and liquid parts.
In multistage centrifugal pumps, because of the high thrust that is generated due to the impellers facing in the same direction, there will be a thrust balance device i.e balance disc or balance drum which reduces the thrust to a level which can be managed by a standard sized thrust bearing.

B. How does a multi stage pump work?
A multistage pump operates by one impeller feeding into the next impeller and the number of impellers required depend on the discharge pressure requirement. Liquid enters the pump and then passes through the various number of impellers in a sequence from the left to right.

C. What are the applications and uses for multi stage pumps?
The applications for multi stage pumps are many and varied and can be used for delivering water to high rise buildings, reverse osmosis (RO), boiler feed water, spraying, high pressure cleaning, water works, heating, condensate, fuel delivery, oil and gas production, power generation & mining and other high pressure and temperature applications..

D. What are the different types of multi stage pumps?
Types of multistage pumps include;
Horizontal Multistage Centrifugal pump (above ground)
Vertical Multistage Centrifugal pump (above ground)
Submersible/Sump pump types
Side Channel pump
Combination pumps i.e Centrifugal low NPSH first stage with side channel additional stage.
Horizontal split case pump
Vertical Turbine pump
Sanitary Multistage pump

E. What are the advantages of using a multi stage pump?
If we were to compare the Centrifugal multi stage pump to a high pressure duty pump - the Centrifugal multi stage pump even though it is more complex and costly, it would probably be a better hydraulic fit, have a better efficiency and be more reliable. With its hydraulic modules, the ability to supply additional impellers and its ability to trim those impellers, the duty point can me met exactly without compromise. The selection is more likely to be close to 'BEP' and will run efficiently and reliably.
Multi stage pumps can be configured to have an interstage bleed off if there are multiple duty points required. It may be possible to run a multistage pump at a lower speed than a single stage centrifugal pump which may offer an efficiency advantage but it will certainly run much quieter which is an important consideration in today's world. A 3 dBA increase represents a doubling of sound as the sound scale is logarithmic.

F. What is difference between a single stage and a multi stage pump?
A single stage pump uses one impeller whereas a multi stage pump uses 2 or more impellers (some manufacturers use 80 or more impellers).
There are additional components in a multi stage pump which are required for channelling the fluid from the first stage to the following stage i.e diffusers.
Multi stage pumps have a thrust balance device and there may also be intermediate bearings (lubricated by the pumpage) to steady the shaft plus other minor differences.

G. How do you read a multistage pump curve?
You read a multi stage pump curve in exactly the same way as you read any other pump type curve however some manufacturers will publish single stage curves which means that this has to be multiplied out to establish the number of stages required, however be aware that the side channel pumps have their maximum power at zero flow and the power decreases with increasing flow which is the reverse of a centrifugal pump.

H. What is the difference between a vertical multistage pump and a horizontal multistage pump?
The main differences between a vertical multi stage pump and a horizontal multi stage pump are;
1.The orientation of the pump
2.The vertical multi stage pump is above ground and may be used where there are space limitations however the motor needs to be removed before maintenance can be performed.
3.Vertical multi stage pumps are used in some applications where the motor needs to be lifted from the sump so that the unit can be maintained. It is common in vertical pumps for the thrust load to be taken by the motor e.g. VTP turbine pumps which have electric motors specifically designed for this type of pump to eliminate the need for a thrust bearing in the pump resulting in less complexity and costs. VTP pumps can be produced with column lengths of more than 100 metres.
4.Horizontal multi stage pumps are mounted using feet which for high temperature applications are a special design to allow for thermal growth and thus avoid operating issues due to expansion and contraction. They would need to be aligned with the electric motor. On vertical pumps, the mounting is perhaps simpler i.e for sump pumps, a support plate would be fixed with standard bolting and generally no alignment is required as the motor is flanged and it is self aligning with the corresponding register.

I. Which type of multistage pump is more commonly used in industry?
The most common type of multi stage pump used in Industry is the horizontal multi stage pump and vertical multi stage pump (above ground) mounted centrifugal pumps. However, multi stage side channel pumps would also be relatively common along with the vertical turbine pumps.

SEMHAI can offer a full range of Flowserve's Multi stage pumps.We provide localised technical support & on-site service engineering to support your operational needs.