Stainless Steel High Lift Electric Pump for Mining and Boiler Feeding

• 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

Introducing the SHD and SHDG series: sophisticated single-suction multistage segmental type centrifugal pumps. These marvels deftly convey water or fluids that possess physical and chemical properties akin to water, devoid of solid particles. The SHD pumps are engineered to handle fluids at temperatures below 80 ºC, making them perfect for applications in mining, industrial settings, and urban drainage systems. On the other hand, the SHDG pumps are tailored for temperatures below 105 ºC, ideally suited for boiler feed operations and the distribution of hot water in various similar scenarios.

Structural Features
The SHD and SHDG pumps are masterpieces of engineering, crafted from essential components including the stator, rotor, bearings, and shaft seal.
1. Stator Part: Ingeniously composed of inhalation, middle, and spit sections, along with guide vanes, these components are precisely clamped with tension bolts, forming the running part. The SHD pump is designed with a horizontal inlet and vertical outlet, while the SHDG pump boasts both vertical inlet and outlet configurations, catering to various operational needs.
2. Rotor Parts: This pivotal section comprises the shaft, impeller, balance plate, bushings, and more. The shaft transmits power to the impeller, enabling efficient operation. Axial forces are meticulously balanced by the balance plate. Additionally, the shaft ends are adorned with replaceable sleeves, providing enhanced protection and longevity.
3. Bearing Part: Equipped with two types of bearings—rolling and sliding bearings:
The sliding bearing setup includes a bearing body, caps, bearing, dust disk, oil level gauge, and rejection mooring rings, all lubricated with thick oil. In contrast, the rolling bearing system, comprising the main body, bearings, and gland, is adeptly lubricated using grease for optimal performance and durability.
4. Shaft Seal Parts: Featuring an advanced mechanical or packing seal, this section integrates a water segment with a sealed body filler and tail cover letter retaining ring components. The seal chamber liquid serves a multifunctional role, providing water sealing, cooling, and lubrication. The SHD model utilizes internal pump pressure water for sealing, while the SHDG harnesses external cooling and normal temperature water. Seal water pressure must surpass seal chamber pressure by 0.05-0.1MPa, with cooling water pressure maintained between 0.15-0.3MPa.

Furthermore, the pump is seamlessly driven by a prime motor via a flexible coupling, ensuring smooth, efficient operation. The pump rotates clockwise, as viewed from the prime motor end.

The versatile SHD and SHDG single-suction multistage segmental type centrifugal booster pumps can be powered by either electric motors or diesel engines, catering to diverse operational requirements.

Detailed Photos

In multistage centrifugal pumps, an incredible amount of thrust is generated due to the alignment of impellers in the same direction. To counteract this powerful force, a sophisticated thrust balance device like a balance disc or balance drum is employed. This innovative solution effectively reduces the thrust to manageable levels, allowing a standard-sized thrust bearing to handle it with ease.
Our adaptable impeller materials include cast iron, cast steel, stainless steel, and bronze, offering versatility for various applications.

Versatile Flexible Couplings
Unlike rigid couplings, flexible couplings are engineered to accommodate some movement, such as vibrations and thermal expansion, without sustaining damage. This makes them exceptionally suited for applications where unavoidable misalignment between the drive and pump shafts may occur. Their ability to absorb vibrations not only minimizes excessive operating noise but also ensures quieter operations. Despite their intricate and costlier design, flexible couplings protect the shaft and bearings from damage and premature wear. This leads to significant maintenance savings over time, making them a wise investment.
For optimal performance, we employ wear-resistant disc couplings or pin couplings.

Packing seals have been a time-honored sealing solution, utilizing rope-like materials that snugly wrap around the pump's shaft to fill dead spaces and minimize fluid loss. However, as the gland packing material begins to wear over time, fluid loss may increase, potentially impairing regular lubrication and reducing the ease of replacement necessary for optimal functionality.

Mechanical seals have become the preferred choice over traditional packing seals in numerous applications where leakage prevention is paramount. These highly durable seals outperform their predecessors, enduring much harsher conditions. Basic mechanical seals are strategically designed with multiple sealing points, effectively eliminating nearly all leakage concerns, ensuring reliability and efficiency.

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 Stainless Steel High Lift Electric Pump is an essential powerhouse in pressure boosting systems. Often employed where constant flow and unwavering pressure are paramount, this superior pump shines in numerous challenging scenarios. Here are a few examples of horizontal multistage pump applications frequently encountered:
Mine Dewatering: Effectively manage and control excess water in mining operations, ensuring safe working conditions and optimized productivity.
High Density Living: Support high-rise buildings with reliable water pressure, ensuring comfort and convenience for all residents.
Snow Making: Essential for creating perfect snow conditions, our pump provides consistent water delivery for snow-making systems.
Boiler Feed Systems: Tailored for efficient and uninterrupted feedwater supply, enhancing boiler performance and longevity.
Reverse Osmosis: Key in water purification processes, providing the precise pressure needed for high-quality water filtration.
Industrial Applications: Versatile and robust, this pump meets the rigorous demands of various industrial settings with ease.
Condensate: Ensure efficient condensate recovery and handling for improved energy efficiency and process performance.
High Pressure Cleaning/Wash Down Facilities: Delivering powerful cleaning solutions for a range of equipment and surfaces, maintaining hygiene and safety.
Jacking Pumps for Fire Hydrant Systems: Critical for enhancing fire safety measures, ensuring rapid and effective emergency response.
Irrigation and Fire Hose Feel Supply: Secure dependable water supply for agricultural irrigation and fire protection, safeguarding productivity and safety.
Showers: Provide consistent water pressure for a luxurious and satisfying shower experience, enhancing everyday comfort.
Co-Generation: Optimizes energy recovery and utilization, boosting overall system efficiency and sustainability.
Spray: Ideal for efficient and precise spray applications, meeting the needs of diverse sectors with accuracy.
Pressure Boosting: Designed to elevate water pressure to desired levels, ensuring optimal performance across various applications.

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.