Durable Cast Iron High Pressure Pump for Mining and Boiler 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 - the pinnacle of single-suction multistage segmental type centrifugal pumps designed meticulously for the flawless transmission of water or fluids sharing similar properties. Engineered to perfection, the SHD pumps are crafted for conveying fluids at temperatures below 80 ºC, making them an ideal choice for mining operations, industrial factories, and urban drainage solutions. Meanwhile, the SHDG variants are distinguished by their capability to handle fluid temperatures up to 105 ºC, perfectly suited for hot water delivery systems, including boiler feed applications and other high-temperature scenarios.

Structural Features
The SHD and SHDG pumps are expertly constructed with key components: stator, rotor, bearings, and a robust shaft seal, ensuring durability and performance.
1, Stator Part: Comprising essential components such as inhalation, middle, and spit sections, along with guide vanes. These are securely held by tension bolts for seamless operation. The SHD model boasts a horizontal inlet and vertical outlet, whereas the SHDG model is distinguished by both vertical inlet and outlet configurations.
2, Rotor Parts: At the core lies the shaft, impeller, balance plate, and protective bushings, meticulously designed for efficiency. The shaft transmits power to the impeller, ensuring optimal functionality; axial forces are expertly countered by the balance plate. The shaft's ends are safeguarded by replaceable sleeves, prolonging the component's life and reliability.
3, Bearing Part: The system features two types of bearings: rolling and sliding, each tailored for precision and stability.
Sliding bearings encompass a bearing body, caps, bearings, dust disk, oil level gauge, rejection mooring rings, and other vital components, all lubricated with thick oil. Rolling bearings consist of the main body, bearings, and a gland, utilizing grease for lubrication, ensuring smooth operation and longevity.
4, Shaft Seal Parts: Equipped with either a mechanical seal or packing seal, these parts include a water segment, sealed body filler, and retaining ring components, all housed within the tail cover letter. This complex system uses a seal chamber liquid for water sealing, cooling, and lubrication. The SHD pump sources its seal water from its internal pressure, whereas the SHDG pump uses external cooling water or ambient temperature water. For optimal performance, the seal water pressure must exceed the chamber pressure by 0.05-0.1MPa, and the cooling water pressure must remain between 0.15-0.3MPa.

Additionally, the pump is precisely driven by a prime motor through a flexible coupling, ensuring reliability. It rotates in a clockwise direction, as observed from the prime motor end, maximizing efficiency and performance.

The versatile SHD and SHDG pumps are engineered to be driven by either an electric motor or a diesel engine, offering flexibility to meet diverse operational needs.
 

Detailed Photos

In the realm of multistage centrifugal pumps, a powerful thrust is naturally generated when the impellers all face a singular direction. To elegantly counterbalance this force, a sophisticated thrust balancing mechanism, such as a balance disc or a balance drum, comes into play. This innovative tool artfully diminishes the thrust to levels that can be seamlessly managed by a standard-sized thrust bearing.
The impeller material selection offers a remarkable range of choices: robust cast iron, resilient cast steel, gleaming stainless steel, and the timeless elegance of bronze.

Ingenious Flexible Couplings
Flexible couplings stand distinct from their rigid counterparts by gracefully accommodating certain movements, such as vibrations and thermal expansion, without incurring damage. This makes them exceptionally suited for scenarios where there is an inevitable degree of misalignment between the drive and pump shafts. Their ability to adeptly absorb vibrations also contributes to significantly reduced operating noise levels. While these advantages come with a more elaborate and costly design, the long-term benefits include safeguarding the shaft and bearings from potential damage and premature wear, leading to noteworthy maintenance savings over time.
Our expertise lies in utilizing wear-resisting disc couplings or pin couplings for enhanced durability.

Packing seals have long stood as the cornerstone of sealing solutions, efficiently utilizing rope-like materials that encircle the pump shaft, meticulously filling voids to minimize fluid escape. However, as time progresses, these seals are prone to increased fluid loss due to the wear and tear of the gland packing material, potentially hindering proper lubrication and easing replacement needs.

In a wide array of applications where leakage is a critical concern, mechanical seals have emerged as the preferred choice over traditional packing seals. Renowned for their exceptional durability, these seals are engineered to withstand significant challenges. Basic mechanical seals employ multiple sealing points to virtually eliminate any leakage concerns, providing a robust performance that sets them apart from their predecessors.

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 Durable Cast Iron High Pressure Pump is a top choice for pressure boosting systems, ensuring reliability and efficiency. These pumps are crucial in scenarios demanding uninterrupted flow and steady pressure. They are particularly ideal for a variety of projects, especially those involving horizontal multistage pumps such as:
Mine dewatering
High density living
Snow making
Boiler feed systems
Reverse Osmosis
Industrial applications
Condensate management
High pressure cleaning and wash down facilities
Jacking pumps for fire hydrant systems
Irrigation and fire hose feed supply
Enhanced shower systems
Co-generation processes
Efficient spray applications
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.