Quality Stainless Steel Multistage Pump for High Lift Water Needs

• 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 engineered with precision to transport water or fluids sharing similar physical and chemical characteristics, free from solid particles. The SHD pumps adeptly handle fluids with temperatures below 80 ºC, making them ideal for applications in mines, various industrial factories, and urban drainage systems. Meanwhile, the SHDG pumps are designed to manage fluids with temperatures up to 105 ºC, perfectly suited as boiler feed pumps or for delivering hot water in comparable scenarios.

Structural Features
Crafted with expert engineering, the SHD and SHDG pumps consist of an assembly of key components: the stator, rotor, bearings, and shaft seal, ensuring robust performance and reliability.
1. Stator Part: Comprising essential elements like the inhalation, middle, discharge sections, and guide vanes, this part is securely clamped with tension bolts, ensuring seamless operation. The SHD model boasts a horizontal inlet and vertical outlet configuration, whereas the SHDG model features both vertical inlet and outlet designs, tailored for specific operational needs.
2. Rotor Parts: Central to the pump's dynamic function, this part includes components such as the shaft, impeller, balance plate, and bushings. The shaft is pivotal in transferring power to the impeller, facilitating effective operation. A balance plate effectively balances axial force, while both shaft ends are fortified with replaceable sleeves for enhanced protection.
3. Bearing Part: Featuring two types of bearings—rolling and sliding bearings:
Sliding bearings consist of components like the bearing body, caps, dust disk, oil level gauge, and rejection mooring rings, utilizing thick oil for lubrication. Meanwhile, rolling bearings comprise the main body, bearings, and gland, employing grease for efficient lubrication.
4. Shaft Seal Parts: Offering options between mechanical or packing seals, these parts include water segments, sealed body fillers, and retaining ring components at the tail cover. The seal chamber liquid serves crucial roles in water sealing, cooling, and lubrication. The SHD pump derives seal water from internal pressure, while the SHDG utilizes cooling water from external sources at normal temperatures. To function optimally, the seal water pressure must exceed the seal chamber pressure by 0.05-0.1MPa, with cooling water pressure ranging from 0.15-0.3MPa.

Furthermore, the pump is directly powered by a prime motor through a flexible coupling, ensuring efficient operation. It rotates clockwise when viewed from the prime motor end, guaranteeing consistent performance.

The versatile SHD and SHDG single-suction multistage segmental centrifugal booster pumps are designed to be powered by either an electric motor or a diesel engine, providing flexibility and adaptability for various power sources.

Detailed Photos

In the realm of multistage centrifugal pumps, the generation of significant thrust due to impellers aligned in the same direction necessitates a thrust balance device. This is where balance discs or balance drums play a crucial role, effectively mitigating the thrust to levels that a standard-sized thrust bearing can effortlessly manage.
Our impellers are crafted from a range of robust materials including cast iron, cast steel, stainless steel, and bronze, ensuring durability and performance.

Flexible Couplings
In contrast to rigid couplings, flexible couplings boast the ability to accommodate various movements such as vibrations and thermal expansions without sustaining damage. This resilience makes them exceptionally suited for applications involving unavoidable misalignment between the drive and pump shafts. Their capacity to absorb vibrations not only reduces excessive operational noise but also offers a quieter work environment. Although they have a more complex and costly design, flexible couplings provide long-term maintenance savings by safeguarding the shaft and bearings against damage and premature wear.
Our choice includes wear-resisting disc coupling or pin coupling, renowned for their durability and efficiency.

Packing seals have long been the go-to sealing solution, utilizing rope-like materials to envelop the pump shaft, fill dead space, and minimize fluid loss. However, as gland packing material gradually wears, fluid loss increases, potentially hindering lubrication and complicating replacement processes.

For applications where leakage poses a significant concern, mechanical seals emerge as the superior choice over traditional packing seals. These seals are engineered for enhanced durability and resilience, utilizing multiple sealing points to virtually eliminate leakage concerns, making them ideal for demanding environments.

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 Stainless Steel Multistage Pumps are quintessential in pressure boosting systems, expertly designed to deliver a steady and reliable flow with consistent pressure. These versatile pumps are indispensable for a variety of demanding scenarios, ensuring optimal performance across a range of projects that rely on horizontal multistage pump technology. Discover the potential of these pumps in:
Mine dewatering: Efficiently manage and drain water from mining areas, ensuring smooth operations and safety.
High density living: Perfectly suited for urban environments, these pumps ensure robust water supply to multi-story buildings and densely populated areas.
Snow making: Power the creation of artificial snow with precision and reliability, essential for ski resorts and winter-themed attractions.
Boiler feed systems: Maintain high-performance standards by providing consistent water supply to boilers, enhancing energy efficiency.
Reverse Osmosis: Deliver superior performance in water purification systems, ensuring the highest quality of clean water.
Industrial applications: Meet the diverse demands of industrial processes with unmatched efficiency and durability.
Condensate: Ensure optimal handling and recirculation of condensate in steam systems, maximizing resource efficiency.
High pressure cleaning/wash down facilities: Achieve exceptional cleaning performance with powerful and reliable water pressure.
Jacking pumps for fire hydrant systems: Safeguard infrastructure with dependable pressure support for fire safety systems.
Irrigation and fire hose feel supply: Support agricultural irrigation and emergency fire response with steady water delivery.
Showers: Enhance the shower experience with consistent and invigorating water flow, perfect for residential and commercial use.
Co generation: Facilitate efficient energy production processes through reliable water flow management.
Spray: Versatile and effective for a range of spraying applications, ensuring even and controlled distribution.
Pressure Boosting: Unleash the full potential of your systems with our robust and high-performing pressure boosting solutions, designed to meet the demanding needs of various 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.