High Pressure Horizontal Centrifugal Water Pump for Boiler Feed Applications

• 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: a masterpiece of engineering in single-suction multistage segmental centrifugal pumps, exquisitely crafted to handle water or fluids with similar physical and chemical properties, devoid of solid particles. The SHD variant is adept at transmitting fluids with temperatures below 80 ºC, making it ideal for the challenging environments of mines, industrial factories, and urban drainage systems. Elevating the operational scope, the SHDG version is proficient in handling higher temperatures up to 105 ºC, perfectly suited for boiler feed applications, hot water delivery, and other high-temperature scenarios.

Structural features
The SHD and SHDG pumps are a symphony of precision engineering, consisting of a stator, rotor, bearings, and a robust shaft seal.
1, Stator part: A marvel of efficient design, it includes the inhalation, middle, and spit sections alongside guide vanes, all firmly secured with tension bolts to ensure seamless operation. The SHD pumps boast a horizontal inlet with a vertical outlet, whereas the SHDG pumps feature the versatility of vertical inlets and outlets.
2, Rotor parts: This dynamic component comprises the shaft, impeller, balance plate, bushings, and more, where the shaft deftly transfers power to the impeller, ensuring optimal performance. The balance plate masterfully balances the axial force, while both ends of the shaft are fortified with replaceable shaft sleeves for enhanced protection.
3, Bearing part: Featuring two sophisticated types of bearings—rolling and sliding bearings:
The sliding bearings, crafted from a bearing body, bearing caps, dust disk, oil level gauge, and rejection mooring rings, are lubricated with thick oil for smooth operation. Meanwhile, the rolling bearings, which include the main body, bearings, and gland, benefit from grease lubrication, ensuring reliability and efficiency.
4, Shaft seal parts: A choice between mechanical seals or packing seals, these components are meticulously designed with a water segment, sealed body filler, and retaining ring components at the tail cover letter. The seal chamber liquid functions as a water seal, providing water-cooling and lubrication. The SHD pump derives its seal water from internal pressure, while the SHDG variant uses external cooling, normal-temperature water. The seal water pressure exceeds the chamber's by 0.05-0.1MPa, and cooling water pressure ranges from 0.15-0.3MPa, ensuring optimal sealing efficacy.

Additionally, these pumps are powered by a prime motor via a flexible coupling, rotating clockwise as viewed from the motor's end, underscoring the blend of power and precision.

These SHD and SHDG single-suction multistage segmental centrifugal booster pumps can seamlessly integrate with either electric motors or diesel engines, catering to diverse power needs.

Detailed Photos

In the world of multistage centrifugal pumps, the magic lies in managing the immense thrust generated by impellers pointing in the same direction. This is where the genius of a thrust balance device, such as a balance disc or balance drum, comes into play. By counteracting the thrust to a manageable level, it ensures smooth, efficient operation using a standard-sized thrust bearing.
Our impellers, crafted from a variety of premium materials including cast iron, cast steel, stainless steel, and bronze, are designed to deliver top-notch durability and performance.

Versatile and Robust Couplings
Flexible couplings are a marvel in engineering, offering the ability to accommodate slight movements, such as vibrations and thermal expansion, without sustaining damage. This makes them indispensable for scenarios involving inevitable misalignment between the drive and pump shafts. Their capacity to absorb vibrations not only reduces excessive operating noise but also adds to the longevity of the machinery. Though they boast a more intricate and costly design, the long-term benefits of safeguarding shafts and bearings from damage and premature wear translate into significant maintenance savings.
We incorporate robust wear-resisting disc couplings or pin couplings to ensure seamless performance.

Packing seals have stood the test of time as a beloved sealing solution. These seals, utilizing rope-like materials to encircle the pump shaft, excel at filling voids and minimizing fluid escape. However, as time progresses, the inevitable wear of gland packing material may lead to increased fluid loss and hinder regular lubrication or ease of replacement, challenging the pump's optimal performance.

In modern applications where leakage prevention is paramount, mechanical seals have become the superior choice over traditional packing seals. These advanced seals offer remarkable durability and are engineered to withstand greater challenges. Employing multiple sealing points, they effectively minimize leakage issues, ensuring reliability and peace of mind.

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 High Pressure Horizontal Centrifugal Water Pump for Boiler Feed Applications is a key component in sophisticated pressure boosting systems. Designed to maintain a steady flow and pressure, this pump excels in demanding environments. Here are some of the most prevalent projects where our horizontal multistage pump proves indispensable:
Mine dewatering: Efficiently manage and remove water from mining sites, safeguarding operations and equipment.
High density living: Ensure consistent water pressure in residential complexes, providing comfort and convenience to residents.
Snow making: Perfect for creating artificial snow in ski resorts, ensuring ideal conditions for winter sports enthusiasts.
Boiler feed systems: Deliver reliable water supply to boilers, optimizing performance and enhancing energy efficiency.
Reverse Osmosis: Integral to high-efficiency water purification systems, delivering pure and clean water.
Industrial applications: Versatile solution for various operational needs across diverse industrial sectors.
Condensate: Effectively manage and transport condensate in various applications, ensuring operational efficiency.
High pressure cleaning/wash down facilities: Provide powerful and consistent water pressure for thorough cleaning processes.
Jacking pumps for fire hydrant systems: Essential for maintaining readiness and effectiveness in emergency fire protection systems.
Irrigation and fire hose feel supply: Ensure dependable water supply for agricultural irrigation and firefighting needs.
Showers: Deliver a luxurious shower experience with consistent water pressure and flow.
Co generation: Enhance the efficiency of combined heat and power systems, supporting sustainable energy solutions.
Spray: Provide optimal spraying performance for various applications across multiple industries.
Pressure Boosting: Unmatched performance in boosting water pressure to meet any demand with ease 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.