Efficient Mining Centrifugal Pump with Mechanical Seal for High Pressure

• 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: expertly engineered single-suction, multistage segmental centrifugal pumps. Tailored for the seamless conveyance of water and fluids akin in their physical and chemical properties, these pumps are designed to handle liquids devoid of solid particles with utmost efficiency. The SHD model is proficient in managing fluid temperatures below 80 ºC, making it ideal for application in mines, industrial facilities, and urban drainage systems. Meanwhile, the SHDG variant is adept at handling fluids up to 105 ºC, perfectly suited as a boiler feed pump or for the transport of hot water and similar conditions.

Structural Features
The SHD and SHDG pumps boast a robust construction comprised of a stator, rotor, bearings, and shaft seal, ensuring durability and reliability.
1. Stator Part: This essential section includes components such as the inhalation, middle, and spit sections, along with guide vanes. These segments are tightly clamped together with tension bolts, forming the running part of the pump. The SHD model features a horizontal inlet and vertical outlet, while the SHDG model is equipped with vertical inlets and outlets, catering to varying installation requirements.
2. Rotor Parts: Comprising the shaft, impeller, balance plate, bushings, and additional components, the rotor is pivotal for pump operation. The shaft delivers power to the impeller, facilitating its function, while the balance plate adeptly manages axial force. The inclusion of replaceable shaft sleeves at both ends offers an added layer of protection.
3. Bearing Part: These pumps incorporate two types of bearings: rolling and sliding.
Sliding bearings consist of a bearing body, caps, dust disks, oil level gauge, and rejection mooring rings, utilizing thick oil for lubrication. In contrast, rolling bearings comprise the main body, bearings, and gland, relying on grease for lubrication, ensuring smooth and efficient operation.
4. Shaft Seal Parts: Featuring either a mechanical or packing seal, these parts consist of water segment and sealed body filler, accompanied by retaining ring components within the tail cover letter. The seal chamber fluid supports the water seal, water-cooling, and water lubrication functions. For the SHD model, seal water is sourced from internal pressure within the pump, whereas the SHDG model utilizes cooling water or ambient temperature water from outside the pump. Seal water pressure must exceed the seal chamber by 0.05-0.1 MPa, and cooling water pressure should be maintained at 0.15-0.3 MPa for optimal performance.

Additionally, these pumps are driven directly by a prime motor through a flexible coupling. Operating in a clockwise direction as seen from the prime motor end, they ensure precision and reliability.

The SHD and SHDG single-suction, multistage segmental centrifugal booster pumps offer versatile power options, being compatible with either electric motors or diesel engines, thereby accommodating diverse operational requirements.

Detailed Photos

In the realm of multistage centrifugal pumps, the significant thrust generated by impellers aligned in the same direction necessitates a sophisticated thrust balance mechanism. This critical apparatus, which includes elements such as a balance disc or balance drum, is designed to meticulously mitigate the thrust to a manageable extent, allowing it to be efficiently handled by a standard-sized thrust bearing.
The impeller material offers a variety of options, including robust cast iron, durable cast steel, resilient stainless steel, and enduring bronze.

Versatile Coupling Solutions
In stark contrast to their rigid counterparts, flexible couplings are engineered to adapt to various movements such as vibrations and thermal expansion without sustaining damage. This adaptability makes them exceptionally suited for scenarios involving unavoidable misalignment between the drive and pump shafts. Their capability to absorb vibrations effectively also plays a crucial role in reducing excessive operational noise. While the design of flexible couplings is inherently more complex and carries a higher cost, they offer significant long-term advantages by shielding the shaft and bearings from damage and premature wear, ultimately resulting in substantial maintenance savings.
Our products incorporate highly durable wear-resisting disc couplings or pin couplings.

Packing seals have long been the industry standard for sealing solutions, employing rope-like materials that encircle the pump shaft to fill dead spaces and minimize fluid leakage. However, as the gland packing material gradually wears down over time, fluid loss increases, potentially hampering regular lubrication and complicating the ease of replacement necessary for optimal performance.

Mechanical seals are the preferred choice over traditional packing seals in a wide range of applications where leakage must be meticulously avoided. These seals are remarkably more durable than their traditional counterparts and are crafted to endure significantly greater stress. Basic mechanical seals function by employing multiple sealing points to effectively eliminate nearly all leakage concerns.

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 Efficient Mining Centrifugal Pump with Mechanical Seal for High Pressure is a powerhouse in pressure boosting systems. These robust pumps are often indispensable in scenarios where consistent flow and steady pressure are non-negotiable. Discover the frequent applications of a horizontal multistage pump in the following key projects:
Mine dewatering - An essential solution for removing water from mining sites, ensuring safety and operational efficiency.
High-density living - Perfect for urban environments where maintaining water pressure across multiple floors is critical.
Snow making - Ideal for creating artificial snow, our pumps support consistent snow production even in fluctuating temperatures.
Boiler feed systems - Ensuring a reliable supply of water to boilers, maintaining system pressure and performance.
Reverse Osmosis - Facilitating the purification process by providing the necessary pressure for optimal filtration.
Industrial applications - Versatile enough to meet the high demands of various industrial processes, enhancing productivity and reliability.
Condensate - Efficiently handling the return of steam or vapor to maximize energy efficiency in different settings.
High pressure cleaning/wash down facilities - Delivering the power needed for thorough cleaning in commercial and industrial environments.
Jacking pumps for fire hydrant systems - Providing critical support in emergency situations, ensuring strong and dependable water flow.
Irrigation and fire hose feel supply - Supplying a steady stream of water for both agricultural irrigation and emergency fire response.
Showers - Ensuring a pleasurable and consistent shower experience with sufficient water pressure.
Co generation - Supporting energy production systems by maintaining necessary pressure levels for effective operation.
Spray applications - Perfect for various spray systems that require consistent pressure to ensure even distribution.
Pressure Boosting - Enhance system performance by elevating water pressure, ideal for both residential and commercial 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.