High Performance Horizontal Booster Pump for Electric 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 series: single-suction, multistage segmental centrifugal pumps, expertly engineered to deliver superior water conveyance and more. The SHD model is perfect for transporting fluids up to 80 ºC, making it ideal for use in mines, factories, and urban drainage systems. Meanwhile, the SHDG model is designed to handle fluids with temperatures up to 105 ºC, ensuring seamless performance as a boiler feed pump or in hot water transportation and similar demanding applications.

Structural Features
The SHD and SHDG pumps boast a robust construction, meticulously crafted from four key components: the stator, rotor, bearings, and shaft seal. Each part plays an integral role in ensuring durability and efficiency.
1. Stator Part: This segment is ingeniously designed with elements like the suction, middle, and discharge sections, along with guide vanes. The clamping segments are secured with tension bolts, ensuring stable operation. The SHD pump features a horizontal inlet paired with a vertical outlet, whereas the SHDG pump is equipped with both vertical inlet and outlet for versatile use.
2. Rotor Parts: At the heart of the operation, these components include the shaft, impeller, balance plate, and bushings. The shaft efficiently transmits power to the impeller, facilitating optimal performance. The balance plate adeptly manages axial force, while the replaceable shaft sleeves at both ends offer added protection and longevity.
3. Bearing Part: This section features two types of bearings - rolling and sliding - each crafted for specific benefits:
Sliding bearings encompass the bearing body, caps, bearings, dust disk, oil level gauge, and rejection mooring rings. These components are lubricated with thick oil to ensure smooth operation. Rolling bearings, on the other hand, include the main body, bearings, and gland, utilizing grease for effective lubrication and minimal friction.
4. Shaft Seal Parts: Offering a choice between mechanical seal and packing seal, these components include a water segment and a series of retaining ring elements at the tail. The seals are designed for water-cooled and water lubrication functions. The SHD pump draws seal water from its own pressure, while the SHDG pump sources seal water from external cooling systems. The seal water pressure is maintained at 0.05-0.1MPa higher than the seal chamber, while the cooling water pressure is kept at 0.15-0.3MPa for optimal performance.

Moreover, the pump is directly driven by a prime mover via a flexible coupling, ensuring stability and efficient energy transfer. It rotates clockwise, as viewed from the prime motor end, signifying robust and reliable operation.

These SHD and SHDG single-suction, multistage segmental centrifugal booster pumps offer flexible operation, powered by either electric motors or diesel engines, catering to a variety of operational needs with efficiency and precision.

Detailed Photos

In the realm of multistage centrifugal pumps, the significant thrust generated due to impellers moving in unison necessitates a thrust balance device such as a balance disc or balance drum. This innovative component effectively reduces thrust to levels manageable by a standard-sized thrust bearing, ensuring the seamless and reliable operation of the system.
Our high-quality impellers are available in a variety of durable materials, including cast iron, cast steel, stainless steel, and bronze, to cater to diverse operational needs and enhance pump longevity.

Flexible couplings
In contrast to rigid couplings, our flexible couplings are engineered to adapt to slight movements like vibrations and thermal expansions without sustaining damage. This makes them ideal for environments where some misalignment between the drive and pump shafts is unavoidable. By effectively absorbing vibrations, they significantly reduce operating noise. The intricate design may come at a higher cost, but the benefits include safeguarding shafts and bearings from damage and premature wear, ultimately leading to long-term maintenance savings.
Our advanced systems utilize wear-resisting disc couplings or pin couplings to ensure robust and reliable performance.

Packing seals have long been the preferred sealing solution, utilizing rope-like materials that encircle the pump shaft to minimize fluid loss. However, as these materials inevitably wear, fluid loss increases, potentially impairing regular lubrication and ease of replacement, which are essential for optimal performance.

Mechanical seals have become the preferred choice over traditional packing seals in a wide range of applications where preventing leakage is crucial. These advanced seals are more durable and capable of handling extensive wear, featuring multiple sealing points that virtually eliminate leakage issues, ensuring superior 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

Our cutting-edge High Performance Horizontal Booster Pumps are the keystone in pressure boosting systems. Engineered for scenarios that require unwavering flow and pressure, these pumps stand out as indispensable solutions. They are the go-to choice for a diverse range of ambitious and essential projects including:
Mine dewatering
High density living
Snow making
Boiler feed systems
Reverse Osmosis
Industrial applications
Condensate
High pressure cleaning/wash down facilities
Jacking pumps for fire hydrant systems
Irrigation and fire hose feel supply
Showers
Co generation
Spray
Pressure Boosting

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.