Durable Bronze Electric Pump for High Pressure Water Boosting Solutions

• 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 of single-suction, multistage segmental centrifugal pumps, engineered to perfection for conveying water or fluids with properties akin to water, all free of solid particles. The SHD pumps are adept at handling transmission fluids with temperatures up to 80 ºC, making them ideal for use in mines, factories, and urban drainage systems. Meanwhile, the SHDG series excels in transmitting fluids with temperatures up to 105 ºC, making them the perfect choice for boiler feed applications and the delivery of hot water across various demanding scenarios.

Structural Features
The SHD and SHDG pumps are crafted from robust components, including the stator, rotor, bearings, and shaft seal, ensuring a reliable and efficient performance.
1. Stator Part: This essential component comprises the inhalation section, middle section, spit section, guide vanes, and more, all securely fastened with tension bolts to form the running section. The SHD-type pump boasts a horizontal inlet and vertical outlet, whereas the SHDG-type pump is designed with both vertical inlet and outlet configurations for versatile application.
2. Rotor Parts: Central to the operation, the rotor includes the shaft, impeller, balance plate, bushings, and additional elements. The shaft effectively channels power to the impeller, instigating its operation; the balance plate mitigates axial forces; both ends of the shaft are shielded with replaceable sleeves for enhanced protection and longevity.
3. Bearing Part: Featuring two types of bearings - rolling bearings and sliding bearings - to cater to diverse operational needs.
Sliding bearings include the bearing body, caps, the bearing itself, a dust disk, an oil level gauge, and rejection mooring rings, all lubricated using thick oil. Rolling bearings consist of the main body, bearings, and gland, utilizing grease for lubrication, ensuring smooth and efficient operation.
4. Shaft Seal Parts: Options for mechanical or packing seals are available, primarily comprising the water segment, sealed body filler, and retaining ring components at the tail cover. The seal chamber liquid fulfills the roles of water sealing, cooling, and lubrication. For the SHD pump, seal water is sourced from the pressure water within the pump, whereas the SHDG derives its seal water from external cooling water at normal temperatures. The seal water's pressure should surpass the seal chamber by 0.05-0.1MPa, and the cooling water's pressure should range from 0.15-0.3MPa, ensuring optimal sealing and cooling performance.

Furthermore, the pump is directly driven by a prime motor through a flexible coupling, providing seamless power transmission. The pump operates in a clockwise rotation when viewed from the prime motor's end, ensuring consistent and reliable operation.

The SHD and SHDG single-suction, multistage segmental centrifugal booster pumps are versatile in their power options, capable of being driven by either an electric motor or a diesel engine, offering flexibility and adaptability to suit various operational demands.

Detailed Photos

In multistage centrifugal pumps, the alignment of impellers in the same direction generates significant thrust. To counteract this, a thrust balance device, such as a balance disc or balance drum, is employed. This innovative solution effectively reduces thrust to a manageable level, ensuring the standard-sized thrust bearing can function optimally and maintain pump performance.
Our impeller selection includes high-quality materials: cast iron, cast steel, stainless steel, and bronze. Each tailored to provide exceptional durability and efficiency for various applications.

Flexible couplings: The dynamic solution that enables smooth operation in dynamic environments.
Flexible couplings, unlike their rigid counterparts, are engineered to adapt to movement, including vibrations and thermal expansion, without incurring damage. This adaptability makes them the preferred choice for applications where drive and pump shafts experience unavoidable misalignment. Furthermore, their superior vibration absorption capabilities significantly reduce operational noise. While their design is more complex and costly, the long-term benefits are undeniable, offering protection against shaft and bearing damage, thereby reducing maintenance costs over time.
We proudly employ wear-resistant disc couplings or pin couplings to ensure unparalleled durability and performance.

Packing seals have been a staple in sealing solutions for years, utilizing rope-like materials to envelop the pump shaft, effectively filling dead space and minimizing fluid loss. However, as the gland packing material wears down, fluid loss may increase, potentially affecting lubrication efficiency and replacement ease, demanding timely maintenance to maintain proper function.

Mechanical seals have become the preferred choice over traditional packing seals, especially in applications where leakage is a critical concern. Known for their durability, these seals are engineered to withstand substantial wear and tear. By employing multiple sealing points, mechanical seals virtually eradicate leakage issues, ensuring reliable and efficient operation.

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 state-of-the-art Durable Bronze Electric Pump excels in pressure boosting systems, where maintaining a steady flow and pressure is paramount. Discover the versatility of our horizontal multistage pump across a range of applications, including:
Mine dewatering – Effortlessly manage water removal in mining operations.
High-density living – Ensure reliable water pressure in residential complexes.
Snow making – Power snow production for recreational venues.
Boiler feed systems – Deliver consistent water supply for efficient boiler operation.
Reverse Osmosis – Enhance water purification processes with precision.
Industrial applications – Support heavy-duty water handling in various industries.
Condensate – Seamlessly handle condensate return and recycling.
High pressure cleaning/wash down facilities – Achieve immaculate cleanliness with superior pressure.
Jacking pumps for fire hydrant systems – Reinforce fire safety systems with dependable performance.
Irrigation and fire hose feed supply – Ensure robust water delivery for irrigation and fire prevention.
Showers – Experience consistent and invigorating shower pressure.
Co-generation – Facilitate efficient energy production through reliable water supply.
Spray – Optimize spray systems for diverse operational needs.
Pressure Boosting – Elevate your water supply systems to meet any high-pressure requirements.

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.