Efficient Cast Steel High Lift Booster Pump for Electric Systems

• 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 remarkable SHD and SHDG single-suction multistage segmental type centrifugal pumps, expertly engineered for the seamless transmission of fluids akin to water, devoid of solid particles. The versatile SHD models are perfect for conveying liquids with temperatures below 80 ºC, making them ideal for application in mines, factories, and urban drainage systems. Meanwhile, the SHDG pumps gracefully handle fluids up to 105 ºC, serving as exceptional boiler feed pumps or effortlessly delivering hot water in various other critical scenarios.

Structural Features
The SHD and SHDG series pumps are meticulously crafted, composed of a robust stator, dynamic rotor, durable bearings, and a reliable shaft seal.
1. Stator Part: This section is adeptly designed with inhalation, middle, and spit segments, alongside guide vanes. These components are skillfully secured by tension bolts, all working in harmony to facilitate the operation. Notably, the SHD-type pump features a horizontal inlet and vertical outlet, whereas the SHDG variant boasts both vertical inlet and outlet configurations.
2. Rotor Parts: At the core lies the rotor, comprising the shaft, impeller, balance plate, bushings, and other vital components. The shaft efficiently transfers power to the impeller, ensuring optimal operation; axial force is counterbalanced by the balance plate. Both ends of the shaft are protected by interchangeable shaft sleeves, ensuring longevity and performance.
3. Bearing Part: These pumps incorporate two distinct types of bearings – rolling bearings and sliding bearings – each serving a unique purpose:
Sliding Bearing: Comprising the bearing body, caps, bearings, dust disk, oil level gauge, and rejection mooring rings, these components are lubricated with thick oil. Rolling Bearing: Features the main body, bearings, and gland, all lubricated using grease, ensuring seamless operation.
4. Shaft Seal Parts: Offering either mechanical seal or packing seal options, the design includes a water segment and sealed body filler, with retaining ring components at the tail cover. The sealing chamber liquid provides water seal, water-cooled, and water lubrication functions, ensuring optimal performance. For the SHD pump, sealing water is sourced from the pressure water inside the pump, while the SHDG model utilizes cooling water from outside the pump. The pressure of sealing water must exceed that of the seal chamber by 0.05-0.1MPa, with cooling water pressure maintained between 0.15-0.3MPa.

Furthermore, the pump is driven effortlessly by a prime motor via a flexible coupling, with its operation observed as clockwise rotation from the prime motor end.

The SHD and SHDG centrifugal booster pumps embody efficiency and versatility and can be powered by either an electric motor or a robust diesel engine, catering to a diverse range of operational needs.

Detailed Photos

In the realm of multistage centrifugal pumps, a remarkable phenomenon occurs due to the substantial thrust generated by impellers aligned in a singular direction. To masterfully counteract this force, an ingenious thrust balance device, such as a balance disc or balance drum, is employed. This device elegantly diminishes the thrust to a manageable level, perfectly suited for a standard-sized thrust bearing.
Our impellers are available in a variety of robust materials, including cast iron, cast steel, stainless steel, and the timeless elegance of bronze.

Sophisticated and Versatile Flexible Couplings
In contrast to the rigidity of their counterparts, flexible couplings offer a harmonious blend of movement accommodation, such as vibrations and thermal expansion, without succumbing to damage. This adaptability renders them ideal for scenarios where a degree of unavoidable misalignment exists between the drive and pump shafts. Their superior vibration absorption capabilities also excel in curbing excessive operating noise. While a more intricate and costly design accompanies these advantages, the long-term benefits are undeniable. By safeguarding the shaft and bearings from premature wear and damage, flexible couplings present significant maintenance savings over time.
Our selection features wear-resistant disc couplings or pin couplings, chosen for their durability and reliability.

For countless years, packing seals have stood as the cornerstone of sealing solutions. These ingenious devices utilize rope-like materials to envelop the pump shaft, effectively filling dead space and minimizing fluid escape. However, as time progresses, the gland packing material may wear, leading to increased fluid leakage and potentially impacting regular lubrication or ease of replacement.

Mechanical seals, favored over traditional packing seals, offer superior performance in applications where leakage prevention is paramount. Boasting enduring durability, these modern marvels are engineered to withstand substantial stress. Basic mechanical seals employ multiple sealing points to virtually eradicate leakage issues, setting a new standard in 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

These pumps are an indispensable component in pressure boosting systems, providing the essential steady flow and pressure needed for optimal performance. Our efficient cast steel high lift booster pump is a prime choice for various demanding applications. Below are some of the most frequent projects and industries that harness the capabilities of our horizontal multistage pump:
Mine dewatering - Ensuring safe and efficient removal of water from mining sites.
High density living - Perfect for residential complexes, delivering reliable water pressure to all units.
Snow making - Essential for creating snow in ski resorts, ensuring optimal snow conditions.
Boiler feed systems - Providing the necessary pressure for steam generation systems.
Reverse Osmosis - Critical in water purification processes, ensuring clean, safe water.
Industrial applications - Versatile enough for diverse industrial needs requiring high pressure.
Condensate - Managing and recycling condensate in various systems efficiently.
High pressure cleaning/wash down facilities - Delivering high-pressure water for thorough cleaning applications.
Jacking pumps for fire hydrant systems - Providing essential pressure support for emergency fire response systems.
Irrigation and fire hose feel supply - Ensuring consistent water supply for agriculture and emergency services.
Showers - Providing powerful and consistent water flow for an enhanced shower experience.
Co generation - Facilitating the energy-efficient process of simultaneous electricity and heat production.
Spray - Ideal for applications requiring precise and consistent spray patterns.
Pressure Boosting - Elevating pressure levels to meet the demands of various systems and 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.