Reliable Horizontal Centrifugal Pump for High Pressure Water Boosting

• 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, exceptional single-suction multistage segmental centrifugal pumps expertly crafted to convey water and liquids with similar physical and chemical properties, free from solid particles. The SHD model is designed to handle fluids at temperatures below 80 ºC, making it ideal for applications in mines, factories, and urban drainage systems. Meanwhile, the SHDG model accommodates fluids up to 105 ºC, making it the perfect choice for boiler feed operations or hot water delivery in various demanding environments.

Structural Features
The SHD and SHDG pumps boast a meticulously engineered construction featuring a stator, rotor, bearings, and shaft seal. Every component is designed to ensure optimal performance and durability.
1, Stator Part: Ingeniously structured with sections for inhalation, center, discharge, and guide vanes, all securely clamped with tension bolts, the stator is the operational heart of the pump. The SHD model showcases a horizontal inlet with a vertical outlet, while the SHDG features both vertical inlet and outlet configurations.
2, Rotor Parts: Comprising the shaft, impeller, balance plate, and bushings, the rotor parts play a crucial role. The shaft transfers power to the impeller, ensuring efficient operation, while the balance plate meticulously balances axial forces. Both ends of the shaft are safeguarded by replaceable sleeves for enhanced protection.
3, Bearing Part: Features two types of bearings: rolling and sliding bearings tailored for specific needs.
The sliding bearing assembly includes the body, caps, bearings, dust disk, oil level gauge, and rejection mooring rings, all lubricated with thick oil for seamless operation. The rolling bearing consists of the main body, bearings, and gland, utilizing grease lubrication to ensure smooth function.
4, Shaft Seal Parts: Offering a choice between mechanical or packing seals, these components, including the water segment and sealed body filler, ensure a reliable seal. The SHD pump uses internal pressure water for sealing, while the SHDG employs cooling water from an external source. It's essential that the seal water pressure exceeds the seal chamber pressure by 0.05-0.1MPa, and the cooling water pressure ranges from 0.15-0.3MPa to maintain optimal performance.

Moreover, the pump is directly driven by a prime motor using a flexible coupling, rotating clockwise when viewed from the prime motor end, ensuring reliable and efficient operation.

The SHD and SHDG pumps, versatile single-suction multistage segmental type centrifugal booster systems, can be driven by either an electric motor or a diesel engine, providing flexibility and adaptability for various industrial needs.

Detailed Photos

In the realm of multistage centrifugal pumps, a significant thrust is produced due to the alignment of impellers in the same orientation. To counteract this high thrust, a sophisticated thrust balance device, such as a balance disc or balance drum, is incorporated. This device ingeniously mitigates the thrust to a manageable level, allowing it to be handled by a thoughtfully designed standard-size thrust bearing. This not only enhances performance but ensures longevity and reliability.
The impeller material options are versatile and robust, including cast iron, cast steel, stainless steel, and bronze. Each material is selected to meet specific operational demands, ensuring optimal performance and durability in various environments.

Ingeniously Designed Flexible Couplings
Unlike their rigid counterparts, flexible couplings are engineered to accommodate slight movements, such as vibrations and thermal expansions, without incurring damage. This adaptability makes them perfect for scenarios where there's unavoidable misalignment between drive and pump shafts. Not only do they excel at absorbing vibrations, thus reducing operational noise, but their sophisticated design also translates into long-term cost savings by safeguarding the shaft and bearings from undue damage and premature wear.
We expertly utilize wear-resisting disc couplings or pin couplings for superior performance.

Packing seals have long been the go-to sealing solution, employing durable rope-like materials that encircle the pump shaft. This method efficiently fills voids and minimizes fluid loss. However, as the gland packing material experiences wear over time, fluid loss may increase, potentially affecting lubrication and ease of replacement—key factors for optimal functionality.

Mechanical seals are increasingly preferred over traditional packing seals, especially in applications where preventing leakage is paramount. These advanced seals offer enhanced durability and are engineered to withstand more rigorous demands. With their innovative design featuring multiple sealing points, mechanical seals effectively minimize leakage issues, making them the superior choice for reliable 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 are the unsung heroes behind various water management scenarios, and our Reliable Horizontal Centrifugal Pump is at the forefront of this innovation. These systems excel in environments necessitating a consistent flow and unwavering pressure. Among the diverse and pivotal projects where a horizontal multistage pump is indispensable, you will find:
Mine dewatering - Efficiently manage and expel water from mining sites, ensuring operational continuity and safety.
High density living - Seamlessly supply water to elevated residential areas, delivering reliability and convenience.
Snow making - Powerfully pump water to create snow in ski resorts, perfecting the winter sports experience.
Boiler feed systems - Essential in providing a steady supply of water for boiler operations, enhancing energy efficiency.
Reverse Osmosis - Key in water purification processes, ensuring the highest quality of potable water in treatment facilities.
Industrial applications - Robust solutions for a multitude of industrial water management needs, from cooling to cleaning.
Condensate - Effectively manage condensate return in heating systems, optimizing resource use and energy savings.
High pressure cleaning/wash down facilities - Enable powerful cleaning for industrial and commercial environments, maintaining hygiene and safety standards.
Jacking pumps for fire hydrant systems - Critical in maintaining readiness and performance of fire safety infrastructure.
Irrigation and fire hose feel supply - Provide reliable water delivery for agricultural irrigation and emergency fire services alike.
Showers - Ensure consistent water pressure and enjoyable shower experiences, catering to both residential and commercial needs.
Co generation - Support integrated energy systems by efficiently managing water flow, enhancing overall productivity.
Spray - Versatile applications in spraying systems, from agriculture to manufacturing, ensuring precision and effectiveness.
Pressure Boosting - The core function that transforms water management systems, ensuring optimal performance across various sectors.

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.