Reliable Multistage High Pressure Pump for Mining and Water Supply

• 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 single-suction multistage segmental type centrifugal pumps, specifically engineered for the conveyance of water or fluids with similar physical and chemical properties, ensuring the absence of solid particles. Our SHD pumps are adept at managing fluid temperatures below 80 ºC, making them ideal for mining operations, industrial factories, and urban drainage systems. Meanwhile, the robust SHDG pumps handle fluid temperatures up to 105 ºC, perfectly suited for boiler feed applications and the delivery of hot water in various demanding scenarios.

Structural Features
The SHD and SHDG pumps are masterfully constructed from four main components: the stator, rotor, bearings, and shaft seal, harmonizing together to deliver exceptional performance.
1. Stator Part: This essential section includes the inhalation, middle, and spit segments, along with guide vanes, all firmly clamped with tension bolts to ensure smooth operation. The SHD-type pump boasts a horizontal inlet and vertical outlet, while the SHDG type features both a vertical inlet and outlet, catering to diverse installation needs.
2. Rotor Parts: The rotor assembly comprises the shaft, impeller, balance plate, and bushings. The shaft efficiently transfers power to the impeller, facilitating its operation, while the axial force is expertly countered by the balance plate. Both ends of the shaft are safeguarded with replaceable sleeves, ensuring prolonged durability.
3. Bearing Part: Our pumps feature two types of bearings: the rolling bearings and sliding bearings.
The sliding bearing assembly consists of the bearing body, caps, dust disk, oil level gauge, and rejection mooring rings, all lubricated with thick oil. The rolling bearing system includes the main body, bearings, and gland, utilizing efficient grease lubrication to maintain optimal performance.
4. Shaft Seal Parts: Incorporating either a mechanical seal or packing seal, this section comprises the water segment, sealed body filler, and retaining ring components at the tail end. The seal chamber’s liquid facilitates water sealing, cooling, and lubrication. For the SHD pump, seal water is sourced from the internal pump pressure, while in the SHDG variant, it is derived from cooling or normal temperature water external to the pump. The seal water pressure should exceed the seal chamber by 0.05-0.1MPa, and cooling water pressure should be maintained at 0.15-0.3MPa.

The pump is powered directly by a prime motor via a flexible coupling, operating in a clockwise direction when viewed from the prime motor end, ensuring seamless integration into existing systems.

The SHD and SHDG single-suction multistage segmental type centrifugal booster pumps offer versatile driving options, capable of being powered by either an electric motor or a diesel engine, providing flexibility and reliability in various applications.

Detailed Photos

In the realm of multistage centrifugal pumps, a remarkable engineering feat addresses the considerable thrust generated by impellers facing a singular direction. Enter the sophisticated thrust balance device, featuring advanced technology such as the balance disc or balance drum. This meticulously engineered solution adeptly diminishes thrust to levels manageable by a standard-sized thrust bearing. Such innovation ensures a harmonious blend of power and precision, optimizing performance and enhancing reliability.
Our impellers are crafted from a selection of premium materials, including robust cast iron, durable cast steel, versatile stainless steel, and timeless bronze. This array of materials is chosen to cater to diverse needs and demanding environments, ensuring longevity and exceptional performance.

Ingenious Flexible Couplings
Unlike the constraints of rigid couplings, flexible couplings stand as a testament to engineering excellence, gracefully accommodating movements like vibrations and thermal expansions without succumbing to damage. They are perfectly suited for scenarios with inevitable misalignment between drive and pump shafts. By effectively absorbing vibrations, these couplings also significantly reduce operating noise. While they come with a more complex, investment-worthy design, their ability to shield shafts and bearings from damage results in significant maintenance savings over time, making them a wise choice for long-term efficiency.
We proudly incorporate wear-resisting disc couplings or pin couplings for enhanced durability and performance.

Packing seals have long held the crown as the go-to sealing solution, utilizing rope-like materials to envelop the pump shaft, adeptly filling dead spaces and minimizing fluid escape. However, as time progresses, these seals may wear, increasing fluid loss and potentially hindering necessary lubrication or ease of replacement. This requires attention to ensure continued optimal functionality.

Mechanical seals have emerged as the preferred choice over traditional packing seals, particularly in applications where leakage must be rigorously controlled. These seals boast superior durability, crafted to withstand more strenuous conditions. Their sophisticated design employs multiple sealing points, effectively minimizing leakage and enhancing operational 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 Reliable Multistage High Pressure Pumps are vital in pressure boosting systems, where maintaining a steady flow and consistent pressure is crucial. These pumps shine in various scenarios, particularly in projects requiring a horizontal multistage pump. Here are some of the most prevalent applications:
Mine Dewatering - Efficiently manage and remove excess water in mining operations, ensuring smooth and safe production.
High Density Living - Cater to the water supply demands of densely populated areas, ensuring reliable and consistent delivery.
Snow Making - Essential in creating artificial snow for ski resorts and winter events, delivering high pressure and efficiency.
Boiler Feed Systems - Provide reliable water supply to boilers, ensuring optimal steam production and energy efficiency.
Reverse Osmosis - Perfect for water purification processes, delivering high pressure for optimal filtration and separation.
Industrial Applications - Adaptable to various industrial needs, ensuring robust and consistent performance in high-pressure scenarios.
Condensate - Efficiently manage and transport condensate in various systems, maintaining smooth operation.
High Pressure Cleaning/Wash Down Facilities - Ideal for facilities requiring thorough and efficient cleaning with high-pressure water jets.
Jacking Pumps for Fire Hydrant Systems - Ensuring fire safety with reliable jacking pumps for consistent and powerful water delivery.
Irrigation and Fire Hose Feel Supply - Support agricultural and fire safety needs with dependable water delivery for irrigation and fire hoses.
Showers - Enhance the shower experience by maintaining strong and consistent water pressure for a rejuvenating rinse.
Co-Generation - Support co-generation systems by providing necessary high-pressure water supply to maximize energy efficiency.
Spray - Deliver high-pressure water for spray applications, ensuring thorough coverage and efficiency.
Pressure Boosting - Crucial for maintaining optimal water pressure across various systems, ensuring consistent and reliable 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.