Premium Quality Mining Water Pump with Mechanical Seal Technology

• 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

Shanghai Semhai Pump Co., Ltd. proudly presents the SHD and SHDG single-suction multistage segmental type centrifugal pumps. These masterpieces of hydraulic engineering are meticulously designed to handle water or fluids with physical and chemical properties akin to water, free of solid particles. The SHD pumps excel in transmitting fluids with temperatures up to 80 ºC, making them ideal for applications in mines, factories, and urban drainage systems. For more demanding tasks, the SHDG pumps step up, effortlessly handling fluids with temperatures up to 105 ºC, perfect for use as boiler feed pumps or for the delivery of hot water in various industrial settings.

Structural features
The SHD and SHDG pumps are crafted with precision engineering, comprising the stator, rotor, bearings, and shaft seal, each element contributing to the pump's impeccable performance and reliability.
1. Stator Part: This component includes the inhalation, middle, and spit sections, complemented by guide vanes, all secured with tension bolts for seamless operation. The SHD pump features a horizontal inlet and vertical outlet design, while the SHDG pump boasts both vertical inlet and outlet configurations.
2. Rotor Parts: Central to the pump's operation, the rotor assembly includes the shaft, impeller, balance plate, and bushings. These parts work in harmony, with the shaft transferring power to the impeller, which drives fluid movement. The axial forces are expertly counteracted by the balance plate, and both ends of the shaft are protected by replaceable sleeves.
3. Bearing Part: The pump features two types of bearings to ensure optimal function: rolling bearings and sliding bearings.
Sliding Bearings: Comprising the bearing body, caps, dust disk, oil level gauge, and rejection mooring rings, these components are lubricated with thick oil. Rolling Bearings: Including main body, bearings, and gland, these boast grease lubrication for smooth, efficient performance.
4. Shaft Seal Parts: Equipped with either a mechanical seal or packing seal, this part includes the water segment and sealed body filler, reinforced by retaining ring components. The chamber's liquid is designed for water sealing, cooling, and lubrication. The SHD pump utilizes internal pump pressure for seal water, while the SHDG employs external cooling water. It's vital that the seal water pressure exceeds the chamber's by 0.05-0.1MPa, and the cooling water pressure is maintained at 0.15-0.3MPa.

Additionally, the pump is directly driven by a prime motor through a flexible coupling, ensuring reliability and efficiency. It rotates clockwise when viewed from the prime motor end, offering seamless integration into your operational setup.

The SHD and SHDG pumps, versatile in their application, can be powered by either an electric motor or a diesel engine, ensuring flexibility and adaptability to meet your specific needs.

Detailed Photos

In the realm of multistage centrifugal pumps, a significant thrust is generated as the impellers face in a unified direction. To counterbalance this high thrust, advanced thrust balance devices, such as balance discs or balance drums, are employed. These sophisticated mechanisms skillfully reduce the thrust to manageable levels, allowing the use of standard-sized thrust bearings, ensuring efficiency and reliability.
The impeller material options include robust cast iron, durable cast steel, corrosion-resistant stainless steel, and versatile bronze. Each material choice offers distinct benefits tailored to specific applications, maximizing performance and longevity.

Flexible couplings
In contrast to rigid couplings, flexible couplings ingeniously accommodate movements such as vibrations and thermal expansion, preventing damage. Their design is perfect for applications with unavoidable misalignments between drive and pump shafts. By effectively absorbing vibrations, they significantly reduce excessive operational noise. While their sophisticated design might be more costly, the long-term benefits are invaluable. These couplings protect shafts and bearings from damage and premature wear, resulting in substantial maintenance savings over time.
Our choice of wear-resistant disc coupling or pin coupling ensures durability and dependable performance, tailored for demanding applications.

Packing seals have long been the prevailing sealing solution, employing rope-like materials to wrap around the pump shaft, effectively filling dead spaces and minimizing fluid loss. However, with time, these packing seals wear down, increasing fluid loss and potentially impairing lubrication or ease of replacement, which are crucial for optimal functionality.

In modern applications, mechanical seals eclipse traditional packing seals, especially when leakage prevention is paramount. These seals are engineered for durability, designed to endure significantly more than their predecessors. With multiple sealing points, basic mechanical seals effectively eliminate leakage concerns, offering superior performance and resilience.

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 Premium Quality Mining Water Pump with Mechanical Seal Technology is a cornerstone in numerous essential pressure boosting systems. These robust pumps are ideally suited for scenarios that require consistent flow and unwavering pressure. Discover the diverse range of projects that frequently harness the power of a horizontal multistage pump:
Mine dewatering: Effectively manage and remove excess water from mining operations, ensuring smooth and safe excavation processes.
High density living: Seamlessly supply water to densely populated areas, maintaining optimal pressure and flow for urban residences.
Snow making: Perfect for creating artificial snow, our pumps support winter sports facilities in delivering thrilling experiences.
Boiler feed systems: Reliable water supply for boilers, maximizing efficiency and safety in heating systems.
Reverse Osmosis: Elevate water purification processes with precision and efficiency, delivering pure water for domestic and industrial uses.
Industrial applications: From manufacturing to processing, our pumps cater to a wide array of industrial needs, ensuring operational excellence.
Condensate: Efficiently manage condensate recovery, promoting energy efficiency and reducing waste in various systems.
High pressure cleaning/wash down facilities: Deliver powerful cleaning solutions with consistent high pressure, essential for sanitation and maintenance.
Jacking pumps for fire hydrant systems: Ensure rapid and reliable water supply for fire emergencies, safeguarding lives and property.
Irrigation and fire hose feel supply: Optimize irrigation processes and maintain readiness for fire emergencies with dependable water flow.
Showers: Provide a luxury shower experience with steady pressure and flow, enhancing personal comfort and satisfaction.
Co generation: Support cogeneration systems by efficiently managing water supply, contributing to energy savings and sustainability.
Spray: Ideal for spray applications, delivering precise and controlled water distribution for various needs.
Pressure Boosting: Elevate water pressure effortlessly to meet specific demands, ensuring optimal performance across 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.