Heavy Duty Electric High Pressure Pump for Horizontal Mining Operations

• 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 series of single-suction, multistage segmental centrifugal pumps are designed to excel in transporting water or liquids with similar physical and chemical properties, devoid of solid particles. The SHD pumps are crafted for fluids with a temperature up to 80 ºC, making them ideal for applications in mining, industrial environments, and urban drainage systems. On the other hand, the SHDG pumps are engineered to handle fluids with temperatures reaching up to 105 ºC, perfectly suited for boiler feed duties and the distribution of hot water in diverse contexts.

Structural Features
The robust design of SHD and SHDG pumps encompasses essential components such as the stator, rotor, bearings, and an innovative shaft seal system.
1, Stator Part: This integral section includes the suction, middle, and discharge sections, along with guide vanes. The segments are held together securely with tension bolts, forming the core running part. The SHD-type pump boasts a horizontal inlet and a vertical outlet, while the SHDG-type pump is configured to have both vertical inlet and outlet, catering to varied installation needs.
2, Rotor Parts: Comprising the shaft, impeller, balance plate, and bushings, the rotor is pivotal in power transmission. The shaft channels energy to the impeller, enabling its functionality; axial forces are adeptly balanced using the balance plate. Protection is ensured with replaceable shaft sleeves at both ends, enhancing longevity.
3, Bearing Part: Two types of bearings are incorporated—rolling and sliding bearings—each offering unique advantages:
Sliding Bearings: These consist of a bearing body, caps, a dust disk, oil level gauge, rejection mooring rings among other components, all lubricated using thick oil. Rolling Bearings: Comprising the main body, bearings, and gland; they benefit from grease lubrication, ensuring smooth, efficient operation.
4, Shaft Seal Parts: Utilizing either mechanical or packing seals, the shaft seal is comprised of a water segment and a series of components including a sealing body, filler, and a retaining ring within the tail cover. The seal chamber liquid facilitates the water seal, cooling, and lubrication processes. The SHD pump sources seal water from the internal pump pressure, whereas the SHDG accesses cooling water externally. To function optimally, the seal water pressure should exceed the seal chamber by 0.05-0.1MPa, while cooling water pressure should range between 0.15 and 0.3MPa.

Moreover, the pumps are directly powered by a prime motor via a flexible coupling, ensuring smooth and efficient operation. These pumps feature a clockwise rotation when viewed from the prime motor end, enhancing reliability and performance.

These SHD and SHDG single-suction multistage segmental centrifugal booster pumps are versatile, capable of being powered by either an electric motor or a diesel engine, thus offering flexibility in power source choices to meet diverse operational demands.

Detailed Photos

In multistage centrifugal pumps, the powerful thrust generated by impellers aligned in the same direction necessitates a sophisticated solution—a thrust balance device such as a balance disc or a balance drum. These components masterfully reduce the thrust to manageable levels, allowing a standard-sized thrust bearing to proficiently handle the load.
The impeller construction is available in a variety of robust materials including cast iron, cast steel, stainless steel, and bronze, ensuring durability and optimal performance across various applications.

Flexible couplings
Flexible couplings are designed to adeptly accommodate movement, including vibrations and thermal expansion, without sustaining damage. These couplings are exceptional for situations where some misalignment between drive and pump shafts is unavoidable. Their ability to absorb vibrations significantly reduces operating noise, making them invaluable in maintaining a quiet environment. Although their design is more complex and costly, the long-term benefits include protection of the shaft and bearings from damage, leading to significant maintenance savings.
We utilize wear-resisting disc coupling or pin coupling to enhance durability and performance in demanding applications.

Packing seals, a longstanding sealing solution, employ rope-like materials to tightly enclose the pump shaft, effectively minimizing fluid loss. Over time, wear can increase fluid loss and may complicate lubrication or replacement processes, impacting operational efficiency.

Mechanical seals are the preferred choice over traditional packing seals in applications where leakage prevention is critical. These seals offer superior durability and are engineered to withstand considerable stress. Featuring multiple sealing points, they significantly minimize leakage concerns, ensuring reliability and performance.

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 commonly implement the robust Heavy Duty Electric High Pressure Pump for a seamless performance in demanding conditions. These scenarios typically require unwavering consistency in both flow and pressure. Notably, horizontal multistage pumps are indispensable in projects such as:
Mine dewatering - Efficiently manage water levels in mining operations, ensuring safety and productivity.
High density living - Sustain urban environments with reliable water pressure in residential areas.
Snow making - Create winter wonderlands with precision and reliability, even in mild climates.
Boiler feed systems - Maintain optimal pressure and circulation for maximum energy efficiency.
Reverse Osmosis - Deliver superior purification processes by ensuring consistent pressure levels.
Industrial applications - Enhance industrial operations with stable and high-performance water pumping.
Condensate - Efficient handling of condensate in various settings, minimizing waste and maximizing efficiency.
High pressure cleaning/wash down facilities - Achieve immaculate cleanliness standards effortlessly.
Jacking pumps for fire hydrant systems - Ensure instant readiness and reliability in emergency situations.
Irrigation and fire hose feel supply - Deliver essential water supply for irrigation and firefighting needs.
Showers - Provide consistent pressure for an invigorating shower experience every time.
Co generation - Support cogeneration systems with dependable pressure for optimal operation.
Spray - Enable versatile spraying applications with precise pressure control.
Pressure Boosting - Ensure robust performance for a variety of systems requiring enhanced water pressure.

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.