Advanced High Pressure Mining Pump with Packing Gland Seal Design

• 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 are state-of-the-art single-suction multistage segmental centrifugal pumps, precision-engineered for the seamless conveyance of water and fluids with similar physical and chemical properties, free of solid particles. The SHD pumps handle fluids with temperatures up to 80ºC, making them ideal for use in mining operations, industrial facilities, and urban drainage systems. Meanwhile, the SHDG pumps have the capacity to manage fluids with temperatures as high as 105ºC, perfect for serving as boiler feed pumps or for transporting hot water and other high-temperature fluids.

Structural Features
Our SHD and SHDG pumps boast a robust construction comprising the stator, rotor, bearings, and shaft seal, each designed for optimal performance and durability.
1. Stator Part: The stator is a marvel of engineering, featuring components like inhalation, middle, and discharge sections, as well as guide vanes. These are all tightly secured by tension bolts, forming the core operational segment. The SHD-type pump showcases a horizontal inlet with a vertical outlet configuration, while the SHDG-type pump is designed with both vertical inlet and outlet for versatile applications.
2. Rotor Parts: The rotor is meticulously crafted, consisting of a shaft, impeller, balance plate, bushings, and other components. The shaft's primary function is to transmit power to the impeller, enabling efficient operation. Moreover, the axial force is expertly balanced by the balance plate. For added protection, both ends of the shaft are equipped with replaceable shaft sleeves.
3. Bearing Part: Our pumps utilize two types of bearings—rolling and sliding—for stability and efficiency:
Sliding bearings comprise a bearing body, bearing caps, bearings, a dust disk, an oil level gauge, and rejection mooring rings, all lubricated with high-grade oil. In contrast, rolling bearings, which include the main body, bearings, and gland, are lubricated with premium grease to ensure smooth operation.
4. Shaft Seal Parts: The pumps offer a choice of mechanical or packing seals, consisting of water segments and sealed body filler, complemented by retaining ring components at the tail cover. The seal chamber’s liquid plays a pivotal role in water sealing, cooling, and lubrication. For the SHD pump, seal water is sourced from internal pressure water, whereas the SHDG pump utilizes cooling water and regular temperature water from external sources. The seal water pressure needs to exceed the seal chamber's pressure by 0.05-0.1MPa, and the cooling water pressure should be maintained at 0.15-0.3MPa.

The pump is ingeniously designed to be directly driven by a prime motor through a sophisticated flexible coupling, ensuring reliability and precision. It operates in a clockwise rotation, as observed from the prime motor end.

The SHD and SHDG single-suction multistage segmental centrifugal booster pumps offer versatile power options, as they can be driven by either an electric motor or a diesel engine, catering to diverse operational needs.

Detailed Photos

In the realm of multistage centrifugal pumps, a substantial thrust is produced as the impellers are oriented in the same direction. To manage this high thrust effectively, a sophisticated thrust balance device, such as a balance disc or balance drum, is incorporated. This ingenious mechanism adeptly reduces the thrust to a manageable level, allowing it to be efficiently handled by a standard-sized thrust bearing.
The impeller material options are diverse, offering choices that include cast iron, cast steel, stainless steel, and bronze.

Flexible couplings
In contrast to their rigid counterparts, flexible couplings offer an ingenious solution by accommodating certain movements like vibrations and thermal expansions with ease, without inflicting any damage. This makes them exceptionally suited for applications where some degree of inevitable misalignment exists between the drive and pump shafts. Their remarkable ability to absorb vibrations also contributes to a significant reduction in excessive operating noise. Although they come with a more complex and costly design, flexible couplings protect shafts and bearings, preventing damage and premature wear, leading to notable maintenance savings over time.
Our selection includes wear-resisting disc coupling or pin coupling, ensuring durability and performance.

Packing seals have long stood as the predominant sealing solution, renowned for their use of rope-like materials that encircle the pump shaft. This design efficiently fills dead spaces, thereby minimizing fluid loss. Nevertheless, over time, fluid loss tends to escalate as the gland packing material gradually wears away, potentially affecting regular lubrication and the ease of replacement essential for optimal functionality.

In diverse applications where leakage is a concern, mechanical seals are favored over traditional packing seals. These modern seals boast enhanced durability and are engineered to withstand harsher conditions. Basic mechanical seals feature multiple sealing points, effectively minimizing any leakage issues and offering a reliable solution 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

Pressure boosting systems commonly employ these pumps. These circumstances usually demand a constant flow and pressure. Some of the most common projects that will use a horizontal multistage pump are: Harnessing their unmatched ability to deliver consistent performance, these pumps are integral in a plethora of sophisticated applications.
Mine dewatering: Safeguard your mining operations with our pump's robust dewatering capabilities, efficiently managing water levels in challenging subterranean environments.
High density living: Enhance urban infrastructure with our pump solutions that seamlessly integrate into high-density residential areas, ensuring reliable water pressure and supply.
Snow making: Transform winter wonderlands with unparalleled snow-making efficiency, providing the ideal solution for ski resorts and winter parks.
Boiler feed systems: Elevate your industrial boiler operations with precision pumping that ensures optimal feed water supply for maximum efficiency.
Reverse Osmosis: Maximize water purification processes with our advanced pump technology, crucial for high-performance reverse osmosis systems.
Industrial applications: Empower a wide range of industries with our pumps' exceptional adaptability and strength in various high-pressure applications.
Condensate: Achieve superior management of condensate systems, optimizing resource recovery and system efficiency seamlessly.
High pressure cleaning/wash down facilities: Revolutionize cleaning operations with high-pressure pumps that deliver exceptional cleanliness and hygiene.
Jacking pumps for fire hydrant systems: Ensure public safety with reliable jacking pumps, an essential component for efficient fire hydrant systems.
Irrigation and fire hose feel supply: Transform agricultural landscapes and enhance fire safety with consistent and powerful water supply solutions.
Showers: Pamper yourself with luxurious water pressure in residential or commercial shower systems, redefining comfort and relaxation.
Co generation: Drive cogeneration processes with precision and reliability, optimizing energy efficiency and resource utilization.
Spray: Achieve perfect spray consistency for a variety of application needs, from agricultural to industrial, with our versatile pump solutions.
Pressure Boosting: Elevate your systems with our state-of-the-art pressure boosting solutions, designed to meet the demands of modern infrastructures with precision and reliability.

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.