Heavy-Duty Cast Steel Multistage Booster Pump for Water Transportation

• 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

Experience unmatched efficiency with the SHD and SHDG single-suction multistage segmental centrifugal pumps, designed specifically for transporting water or fluids with similar physical and chemical properties, free of solid particles. The SHD model is adept at handling fluids at temperatures below 80°C, making it ideal for applications in mining, industrial factories, and urban drainage systems. Meanwhile, the SHDG model is engineered to manage fluids up to 105°C, making it the perfect choice for boiler feed pumps or the conveyance of hot water in various settings.

Structural features
Our SHD and SHDG pump models are meticulously crafted from four key components: stator, rotor, bearings, and shaft seal.
1. Stator Part: The stator consists of key elements such as the suction, middle, and discharge sections, as well as guide vanes, all secured with tension bolts to form the operational core. The SHD pump features a horizontal inlet and a vertical outlet, while the SHDG pump boasts vertical inlets and outlets, ensuring versatile adaptability.
2. Rotor Parts: Comprising of a robust shaft, impeller, balance plate, and protective bushings, the rotor is engineered for optimal power transfer to the impeller, ensuring efficient operation. The balance plate effectively neutralizes axial forces, and both ends of the shaft are equipped with replaceable sleeves for enhanced durability.
3. Bearing Part: Featuring two types of bearings—rolling and sliding—each designed for peak performance:
Sliding Bearings: Include a comprehensive assembly of bearing body, caps, dust disks, oil level gauges, and mooring rings, all lubricated with thick oil for seamless operation. Rolling Bearings: Composed of the main bearing body and gland, these bearings utilize grease for superior lubrication.
4. Shaft Seal Parts: Equipped with either mechanical or packing seals, these components are crafted from water segment and sealed body filler, along with retaining rings at the tail cover. The seal chamber uses liquid to facilitate water sealing, cooling, and lubrication. For SHD pumps, seal water is sourced from internal pump pressure, while SHDG pumps use external cooling or normal temperature water. The seal water pressure must exceed the chamber's pressure by 0.05-0.1MPa, with cooling water pressures ranging from 0.15-0.3MPa.

Additionally, each pump is directly driven by a prime motor via a flexible coupling, ensuring consistent clockwise rotation as viewed from the motor end, guaranteeing reliable performance.

SHD and SHDG pumps offer versatile power options, as they can be driven by either an electric motor or a diesel engine, providing flexibility and convenience to meet diverse operational needs.

Detailed Photos

In the realm of multistage centrifugal pumps, the impressive force generated by the impellers facing a singular direction demands a sophisticated solution. Enter the thrust balance device—a marvel of engineering, featuring either a balance disc or a balance drum. This ingenious mechanism effectively mitigates the high thrust to a manageable level, enabling standard-sized thrust bearings to operate seamlessly.
The choice of impeller material is crucial in optimizing pump performance. Options include robust cast iron, durable cast steel, resilient stainless steel, and versatile bronze, each contributing unique properties to ensure the longevity and efficiency of the pump system.

Flexible couplings
Flexible couplings stand out from their rigid counterparts by allowing room for movement, such as vibrations and thermal expansions, without sustaining damage. This capability makes them indispensable in scenarios with unavoidable misalignment between drive and pump shafts. Their ability to absorb vibrations not only minimizes excessive operating noise but also translates into significant maintenance savings over time, despite their complex and costlier design. By safeguarding the shaft and bearings from damage and premature wear, flexible couplings represent a wise investment in longevity and operational efficiency.
Our design incorporates wear-resisting disc couplings or pin couplings, ensuring durability and performance.

Packing seals have held the title of the most widely used sealing solution for countless years. Constructed from rope-like materials, they wrap snugly around the pump shaft, filling vacant spaces and curbing fluid loss. However, as time progresses, the gland packing material may begin to wear, potentially increasing fluid loss and complicating necessary lubrication and replacement processes.

Mechanical seals have increasingly become the preferred choice over traditional packing seals, especially in applications where leak prevention is paramount. Renowned for their robustness, mechanical seals offer enhanced durability and are engineered to endure more rigorous conditions. By employing multiple sealing points, they virtually eliminate leakage concerns, ensuring optimal performance and 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 Heavy-Duty Cast Steel Multistage Booster Pump is the backbone of sophisticated pressure boosting systems. These innovative pumps are essential in situations requiring unwavering flow and pressure consistency. Here are the most prevalent projects where horizontal multistage pumps like ours excel:
Mine Dewatering: Efficiently manage and extract water in mining operations, ensuring smooth and safe operations.
High-Density Living: Perfect for supplying consistent water pressure in densely populated residential areas, ensuring comfort and convenience.
Snow Making: Essential for creating snow, providing consistent performance in winter sports and recreational facilities.
Boiler Feed Systems: Deliver steady water supply for industrial boilers, optimizing performance and reliability.
Reverse Osmosis: Integral for high-performance water purification systems, ensuring pure and clean water.
Industrial Applications: Versatile enough to handle various industrial tasks, providing reliability and efficiency.
Condensate: Manage condensate recovery systems effectively, contributing to energy conservation and cost savings.
High-Pressure Cleaning/Washdown Facilities: Delivers powerful pressure for thorough cleaning in industrial and commercial settings.
Jacking Pumps for Fire Hydrant Systems: Essential for maintaining optimal pressure in fire safety systems, ensuring readiness and reliability.
Irrigation and Fire Hose Reel Supply: Ensure robust water supply for agriculture and fire safety, vital for protection and productivity.
Showers: Provide a steady and luxurious water flow for residential and commercial showers, enhancing user experience.
Co-Generation: Supports combined heat and power systems, promoting energy efficiency and sustainability.
Spray: Ideal for a variety of spray applications, delivering precision and control.
Pressure Boosting: Elevate your water pressure to new heights with our state-of-the-art solutions, designed for excellence.

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.