Reliable Multistage High Lift Water Pump for Mining Industry Use

• 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 from Shanghai Semhai Pump Co., Ltd., the epitome of engineering excellence in single-suction multistage segmental type centrifugal pumps. These pumps are adept at handling water and fluids with similar physical and chemical properties, free from solid particles. The SHD variant is perfect for conveying fluids with temperatures below 80ºC, making it ideal for mining, industrial factories, and urban drainage solutions. Meanwhile, the SHDG variant can manage fluids up to 105ºC, perfectly suited as boiler feed pumps or in transporting hot water across various applications.

Structural Features
The SHD and SHDG models are meticulously crafted from four key components: stator, rotor, bearings, and shaft seal, ensuring superior performance and reliability.
1. Stator Part: Comprising essential segments such as inhalation, middle, and discharge sections, complemented by guide vanes and secured with tension bolts. The SHD-type pump features a horizontal inlet and vertical outlet, while the SHDG boasts both vertical inlet and outlet, making them versatile for varied operations.
2. Rotor Parts: These include the core shaft, impeller, balance plate, and bushings among other elements. The shaft is the powerhouse, transferring energy to the impeller, while the balance plate efficiently neutralizes axial force. Each shaft end is fortified with a replaceable shaft sleeve, ensuring prolonged durability and protection.
3. Bearing Part: The pumps utilize two distinct types of bearings: rolling bearings and sliding bearings. Each bearing part is meticulously designed to optimize performance.
Sliding Bearings: Composed of the bearing body, caps, bearings, dust disk, oil level gauge, and rejection mooring rings, it utilizes thick oil for lubrication. Rolling Bearings: Encompasses the main body, bearings, and gland, using grease for lubrication, ensuring seamless operation.
4. Shaft Seal Parts: Equipped with a choice of mechanical or packing seals, these parts consist of water segments and sealed body fillers, along with retaining ring components at the letter tail cover. The seal chamber liquid enhances the water seal, offering water-cooling and lubrication functionalities. For the SHD pump, seal water is sourced from internal pump pressure, while the SHDG utilizes external cooling water. The seal water pressure is maintained between 0.05-0.1MPa, with cooling water pressure ranging from 0.15-0.3MPa.

Furthermore, this pump employs a direct drive mechanism through a prime motor connected via flexible coupling, ensuring efficient and reliable operation. The product operates with a clockwise rotation when viewed from the prime motor end.

The versatile SHD and SHDG single-suction multistage segmental type centrifugal booster pumps are designed to be powered flexibly by either an electric motor or diesel engine, catering to diverse operational needs and ensuring unparalleled adaptability in the field.

Detailed Photos

In the realm of multistage centrifugal pumps, when the mighty impellers march in unison, pointing in the same direction, they generate a remarkable amount of thrust. To tame this immense force, a sophisticated thrust balance device, such as a balance disc or balance drum, is employed. This ingenious mechanism expertly diminishes the thrust to a level comfortably handled by a standard-sized thrust bearing, ensuring seamless performance and reliability.
The impeller material options are vast and versatile, offering cast iron, cast steel, stainless steel, and bronze, each chosen for its unique properties to suit various industrial needs.

Flexible couplings
Contrary to rigid couplings, flexible couplings have the remarkable ability to adapt to movement, such as vibrations and thermal expansions, without incurring damage. This adaptability makes them perfect for scenarios where there is inevitable misalignment between the drive and pump shafts. Not only do they excel at absorbing vibrations, reducing excessive operating noise, but they also offer long-term benefits. Although they come with a more intricate and costly design, the payoff is substantial as they shield the shaft and bearings from undue harm and premature wear, resulting in considerable maintenance savings over time.
Our selection includes the use of wear-resisting disc couplings or pin couplings, exemplifying strength and durability.

Packing seals have long been heralded as the go-to sealing solution, utilizing rope-like materials that snugly embrace the shaft of a pump, effectively filling dead spaces and minimizing fluid loss. However, as time passes, the gland packing material may wear down, leading to an increase in fluid loss and potentially hindering regular lubrication, as well as reducing the ease with which replacements can be made. Ensuring proper maintenance and care is crucial for optimal functionality.

Mechanical seals are the modern marvels, surpassing traditional packing seals, especially where leakage resistance is paramount. These seals are engineered for durability, designed to withstand significant challenges. Their ingenious construction includes multiple sealing points, which work in harmony to virtually eliminate any leakage concerns, making them the preferred choice in a wide array of demanding applications.

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 frequently rely on these pumps, offering a reliable solution for circumstances that require unwavering flow and pressure. Key projects utilizing horizontal multistage pumps include:
Mine dewatering: Essential for removing water accumulation in mining operations, ensuring efficiency and safety.
High density living: Provides stable water pressure, catering to the demands of urban residential complexes.
Snow making: Delivers consistent water flow, crucial for artificial snow production on ski slopes.
Boiler feed systems: Secures seamless water supply for steam generation in various industrial processes.
Reverse Osmosis: Supports high-efficiency desalination and filtration processes in water treatment facilities.
Industrial applications: A versatile choice for various heavy-duty operations requiring robust water management.
Condensate: Facilitates the effective removal of condensation in HVAC systems and industrial setups.
High pressure cleaning/wash down facilities: Ensures powerful cleaning capabilities for commercial and industrial spaces.
Jacking pumps for fire hydrant systems: Critical for maintaining pressure in emergency fire suppression systems.
Irrigation and fire hose reel supply: Delivers dependable water supply for agricultural irrigation and fire safety.
Showers: Provides consistent water flow for optimal comfort in residential and commercial bathrooms.
Co-generation: Integral to systems that simultaneously produce electricity and useful heat, optimizing energy efficiency.
Spray: Utilized in applications requiring precise water distribution, from agriculture to industrial settings.
Pressure Boosting: Enhances water pressure for improved performance in various water distribution networks.

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.