Quality High Lift Electric Pump for Mining and Industrial Applications

• 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: our single-suction, multistage, segmental centrifugal pumps. Engineered to transport water or fluids with similar physical and chemical properties—absent of solid particles—these pumps exemplify reliability and performance. The SHD model efficiently handles fluids up to 80 ºC, making it ideal for mining, industrial factories, and urban drainage systems. The SHDG model, on the other hand, is designed for higher temperature operations up to 105 ºC, perfectly suited for boiler feed and hot water transport applications.

Structural Features
The robust SHD and SHDG pumps boast a construction comprising the stator, rotor, bearings, and a sophisticated shaft seal system.
1. Stator Part: This component includes sections for inhalation, middle, discharge, and guide vanes, all secured with tension bolts to maintain integrity during operation. The SHD model features a horizontal inlet and a vertical outlet, while the SHDG pump is designed with both vertical inlet and outlet for optimal fluid flow.
2. Rotor Parts: Comprised of the shaft, impeller, balance plate, and bushings, these elements work harmoniously to deliver power from the shaft to the impeller, ensuring efficient operation. The balance plate masterfully counteracts axial forces, while both ends of the shaft are protected with replaceable sleeves.
3. Bearing Part: Featuring two types of bearings: rolling and sliding bearings.
Sliding bearings include the body, caps, bearings, dust disk, oil level gauge, and rejection mooring rings, all lubricated with thick oil for smooth operation. In contrast, rolling bearings utilize a grease lubrication system, comprising the main body, bearings, and gland.
4. Shaft Seal Parts: These include a choice of mechanical or packing seals, with components like the water segment, sealed body filler, and retaining ring at the tail cover. The design integrates a seal chamber liquid, facilitating water sealing, cooling, and lubrication. In SHD models, seal water is sourced from within the pump, while SHDG models use external cooling water. The seal water pressure must exceed the seal chamber pressure by 0.05-0.1MPa, and the cooling water pressure should range between 0.15-0.3MPa.

For seamless operation, the pump is directly driven by a prime mover using flexible coupling, rotating clockwise when viewed from the prime mover's end.

The versatile SHD and SHDG centrifugal booster pumps can be powered by either an electric motor or a diesel engine, offering adaptable solutions for various operational needs.

Detailed Photos

In the realm of multistage centrifugal pumps, the generation of high thrust due to the impellers facing in the same orientation necessitates a robust thrust balance mechanism. This is typically achieved with a balance disc or balance drum, ingeniously crafted to mitigate the thrust to a manageable level that a standard-sized thrust bearing can handle efficiently.
Our impellers boast a diverse array of material options to cater to varying needs, including cast iron, cast steel, stainless steel, and bronze.

Versatile Couplings
Flexible couplings stand apart from their rigid counterparts by adeptly accommodating movement, such as vibrations and thermal expansion, ensuring no damage ensues. This ability makes them perfect for situations involving inevitable misalignment between the drive and pump shafts. Their exceptional capability to absorb vibrations not only safeguards the system but also results in reduced operational noise. While their design is more complex and may incur higher costs initially, the long-term maintenance savings are significant, as they provide protection against shaft and bearing damage and premature wear.
We have incorporated wear-resisting disc couplings or pin couplings to ensure durability and optimal performance.

Packing seals have long been the preferred sealing solution, utilizing rope-like materials that wrap around the pump shaft to fill dead space and minimize fluid loss. However, over time, the gland packing material may wear down, leading to increased fluid leakage and potentially impacting the regular lubrication or ease-of-replacement necessary for optimal functionality.

In applications where leakage prevention is paramount, mechanical seals are the superior choice over traditional packing seals. These seals are designed to endure rigorous conditions, offering enhanced durability and utilizing multiple sealing points to virtually eliminate leakage concerns.

Product Parameters

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

Product Application

Pressure boosting systems frequently rely on these robust pumps to deliver consistent flow and pressure in demanding situations. Some of the most prevalent projects utilizing a horizontal multistage pump include:
Mine dewatering - essential for removing excess water to ensure operational efficiency and safety in mining sites.
High density living - providing reliable water supply in urban areas where demand is high and space is limited.
Snow making - instrumental in generating artificial snow for ski resorts and recreational facilities, ensuring optimal skiing conditions.
Boiler feed systems - supplying the necessary water for steam generation in industrial and commercial boilers.
Reverse Osmosis - powering the purification process to produce clean, safe drinking water by removing impurities and contaminants.
Industrial applications - enhancing productivity and efficiency in a variety of manufacturing and processing industries with precise water management.
Condensate - effectively managing and recycling steam condensate to improve energy efficiency and cost savings.
High pressure cleaning/wash down facilities - delivering powerful cleaning capabilities for industrial and commercial environments.
Jacking pumps for fire hydrant systems - ensuring rapid and reliable response for firefighting efforts, protecting lives and property.
Irrigation and fire hose feel supply - maintaining lush landscapes and vital fire protection in agricultural and urban settings.
Showers - offering consistent water pressure for a refreshing and invigorating shower experience in residential and commercial buildings.
Co generation - supporting the simultaneous production of electricity and useful heat, optimizing energy use and reducing waste.
Spray - enabling precise and efficient application of liquids in agricultural, industrial, and commercial settings.
Pressure Boosting - enhancing water flow and pressure in a range of residential, commercial, and industrial environments for improved performance.

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.