Superior Quality Multistage High Pressure Pump for Mining 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, single-suction multistage segmental centrifugal pumps, carefully crafted for the seamless conveyance of water and fluids with similar physical and chemical properties, devoid of solid particles. SHD pumps gracefully operate with fluids at temperatures below 80 ºC, perfect for deployment in mining operations, industrial factories, and urban drainage systems. Meanwhile, the SHDG pumps handle fluid temperatures up to 105 ºC, making them ideal as boiler feed pumps, as well as for delivering hot water and other analogous scenarios.

Distinctive Structural Features
The SHD and SHDG pumps are composed of four integral components: the stator, rotor, bearings, and shaft seal.
1. Stator Part: Comprising the intake, mid, and discharge sections, along with guide vanes, these components are securely clamped with tension bolts to form the running part. The SHD-type pump boasts a horizontal inlet and vertical outlet, whereas the SHDG-type pump features both vertical inlet and outlet for optimal functionality.
2. Rotor Parts: Central to the assembly are the shaft, impeller, balance plate, and bushings. The shaft efficiently transfers power to the impeller, ensuring smooth operation. The balance plate adeptly counteracts axial force, while both ends of the shaft are safeguarded by replaceable shaft sleeves.
3. Bearing Part: Available in two types, our bearings cater to varied needs: rolling bearings and sliding bearings.
Sliding Bearing: Comprising a bearing body, caps, dust disk, oil level gauge, and rejection mooring rings, these are lubricated with thick oil. Rolling bearings include the main body and gland, leveraging grease for optimal lubrication.
4. Shaft Seal Parts: Choose between mechanical seals or packing seals, consisting of a water segment, sealed body filler, and retaining ring components. The seal chamber's liquid enables water sealing, cooling, and lubrication. For the SHD pump, seal water is sourced from internal pressure, while the SHDG utilizes cooling water from an external normal temperature source. The seal water pressure must exceed the chamber by 0.05-0.1 MPa, with cooling water pressure set between 0.15-0.3 MPa.

Furthermore, the pump is directly driven by a prime motor via a flexible coupling, operating in a clockwise rotation when viewed from the prime motor end, assuring reliability and performance.

The versatile SHD and SHDG pumps—single-suction multistage segmental centrifugal boosters—can be powered by either an electric motor or a diesel engine, adapting seamlessly to your power source preferences.

Detailed Photos

In the realm of multistage centrifugal pumps, the substantial thrust produced by impellers aligned in the same direction necessitates an ingenious solution. Enter the thrust balance device, such as the balance disc or balance drum, which skillfully mitigates this powerful thrust to manageable levels for a standard-sized thrust bearing, ensuring optimal performance and longevity.
Our impellers are crafted with precision and available in a variety of robust materials including cast iron, cast steel, stainless steel, and bronze, each selected for its unique properties and suitability for diverse applications.

Flexible couplings
Unlike their rigid counterparts, flexible couplings offer a remarkable adaptability to movement, allowing them to handle vibrations and thermal expansion effortlessly without succumbing to damage. This adaptability makes them ideal for settings where slight misalignment between drive and pump shafts is inevitable. They excel at absorbing vibrations, thereby significantly reducing operational noise. While their design may be more intricate and carry a higher initial cost, the promise of long-term maintenance savings through protection of shafts and bearings from premature wear and damage is invaluable.
We incorporate wear-resisting disc coupling or pin coupling in our design.

Packing seals, an enduring choice, have been the stalwart sealing solution across numerous applications for many years. These seals employ rope-like materials to encircle and safeguard the pump shaft, effectively filling dead spaces and minimizing fluid leakage. However, as time progresses, the gland packing material may wear down, leading to increased fluid loss and potentially complicating lubrication or replacement processes.

Mechanical seals, hailed for their superior design, are the preferred choice in applications demanding stringent control over leakage. Far surpassing traditional packing seals in durability, these innovative seals are engineered to withstand rigorous conditions. Their advanced configuration utilizes multiple sealing points to virtually eliminate leakage issues, providing a reliable and long-lasting solution.

Product Parameters

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

Product Application

In the realm of pressure boosting systems, these pumps stand as pillars of reliability and efficiency. The demand for a steady flow and unwavering pressure is expertly met by our pumps, making them an indispensable choice. Below are some of the most prevalent projects where horizontal multistage pumps are utilized:
Mine dewatering: Perfectly suited for extracting water, ensuring seamless operations even in the most demanding mining environments.
High density living: Delivering reliable water pressure to urban high-rise structures, enhancing the quality of residential life.
Snow making: Essential for creating pristine winter landscapes, these pumps deliver the consistency required for snow production.
Boiler feed systems: A critical component in maintaining optimal operations, our pumps ensure efficient water circulation for steam generation.
Reverse Osmosis: Facilitating the purification of water, these pumps are vital for producing clean, potable water.
Industrial applications: From manufacturing to processing, our pumps cater to a multitude of industrial needs, delivering superior performance.
Condensate: Effectively managing condensate return systems, our pumps optimize energy efficiency and reduce operational costs.
High pressure cleaning/wash down facilities: Offering powerful pressure solutions, these pumps excel in maintaining hygiene and cleanliness.
Jacking pumps for fire hydrant systems: Ensuring swift and reliable water supply in emergency situations, safeguarding lives and structures.
Irrigation and fire hose feed supply: Providing consistent water delivery, these pumps are crucial for agriculture and firefighting efforts.
Showers: Enhancing everyday comfort with consistent water pressure, ensuring a refreshing and invigorating experience.
Co-generation: Supporting the efficient production of electricity and heat, these pumps are key to modern energy solutions.
Spray: Offering precision and control, our pumps are ideal for diverse spraying applications across various industries.
Pressure Boosting: Elevating water systems to new heights, these pumps provide unparalleled pressure control for a variety of 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.