Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal

Product Details
Customization: Available
After-sales Service: Online After-Sale Service
Warranty: 12 Months
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Plant Area
>2000 square meters
  • Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
  • Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
  • Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
  • Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
  • Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
  • Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
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  • Overview
  • Product Description
  • Detailed Photos
  • Product Parameters
  • Product Application
  • Facilities & Equipments
  • FAQ
Overview

Basic Info.

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

Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal

Product Description

Introducing the SHD and SHDG: single-suction, multistage segmental centrifugal pumps engineered for the efficient conveyance of water or fluids with similar physical and chemical properties, devoid of solid particles. The SHD model operates seamlessly at fluid temperatures as low as 80 ºC, making it an ideal choice for mines, factories, and urban drainage systems. Meanwhile, the SHDG model is designed for higher temperatures, up to 105 ºC, perfectly suited for applications such as boiler feed pumps or the transportation of hot water and analogous scenarios.

Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal

Structural features
The SHD and SHDG pumps boast a sophisticated composition, comprising the stator, rotor, bearings, and an advanced shaft seal.
1, Stator part: A marvel of engineering, it consists mainly of the inhalation, middle, and spit sections, complemented by guide vanes. The robust design is secured with tension bolts allowing smooth operation. For the SHD model, a horizontal inlet and vertical outlet configuration is employed, while the SHDG model features a vertical inlet and outlet design for optimum functionality.
2, Rotor parts: Central to the operation are components such as the shaft, impeller, balance plate, and bushings. The shaft's primary role is to transmit power to the impeller, enabling efficient performance; the balance plate ingeniously mitigates axial force, and both ends of the shaft are protected by durable, replaceable sleeves.
3, Bearing part: Engineered with precision, the bearing part comprises two types: rolling bearings and sliding bearings.
The sliding bearing structure includes components like the bearing body, caps, dust disk, oil level gauge, rejection mooring rings, and more, all lubricated by thick oil for seamless operation. In contrast, the rolling bearing features a main body and gland, utilizing grease to ensure smooth mechanics.
4, Shaft seal parts: A choice between a mechanical or packing seal, these components are crafted for excellence. The assembly includes a water segment, sealed body filler, and retaining ring elements at the tail cover letter. The chamber's liquid plays a pivotal role in water sealing, cooling, and lubrication. For SHD pumps, seal water is sourced from internal pump pressure, while SHDG pumps derive it externally from cooling water. Seal water pressure should be elevated 0.05-0.1MPa above the seal chamber, with cooling water pressure maintained at 0.15-0.3MPa for optimal performance.
Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal

Additionally, the pump is adeptly driven by a prime motor through a flexible coupling mechanism. Designed for precision, the pump rotates clockwise, a view observable from the prime motor's end.
Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal

The SHD and SHDG pumps, as single-suction multistage segmental type centrifugal booster pumps, offer versatile drive options, capable of being powered by either an electric motor or a diesel engine, catering to varied operational needs.

Detailed Photos

Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
In the realm of multistage centrifugal pumps, the significant thrust generated by impellers aligned in a singular direction necessitates a sophisticated thrust balance device. This is where the ingenious balance disc or balance drum comes into play, meticulously countering the thrust to a degree that can be effortlessly managed by a standard-sized thrust bearing, ensuring seamless operation and longevity.
Our impellers are crafted from high-quality materials, including cast iron, cast steel, stainless steel, and bronze, each chosen for their exceptional durability and performance under varying operational conditions.
Flexible couplings
Flexible couplings, in contrast to their rigid counterparts, are designed to accommodate a degree of movement such as vibrations and thermal expansion without sustaining damage. This unique feature makes them perfectly suited for scenarios with unavoidable misalignment between the drive and pump shafts. By effectively absorbing vibrations, they not only minimize operational noise but also contribute to a quieter, more efficient environment. While they do come with a more intricate and costly design, the long-term benefits are undeniable. Flexible couplings provide superior protection to the shaft and bearings against damage and premature wear, offering substantial maintenance savings over time.
Our offerings include wear-resisting disc coupling or pin coupling, tailored for enhanced durability and performance.
Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
Packing seals have long been the go-to sealing solution due to their simplicity and effectiveness. These seals employ rope-like materials to wrap around the pump shaft, effectively filling dead space and minimizing fluid loss. However, as the gland packing material experiences wear over time, it can lead to increased fluid leakage, potential impairment of regular lubrication, and challenges in ease of replacement, which are crucial for optimal functioning.

In a multitude of applications where preventing leakage is paramount, mechanical seals are the favored choice over traditional packing seals. Renowned for their robustness, mechanical seals significantly outlast their predecessors and are engineered to endure much harsher conditions. These advanced seals utilize multiple sealing points to virtually eliminate leakage problems, offering superior reliability and performance.

Product Parameters

Flow rate 6-1000m3/hr
Head rate 25-650m
Speed 1450-2900rpm
Medium temperature 0-105 ºC
Diameter 40-350mm
Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal

Product Application


Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
Our sophisticated pressure boosting systems frequently rely on these advanced pumps. Typically, these scenarios require a seamless and uninterrupted flow, paired with consistent pressure. Here are some of the most prevalent projects where a horizontal multistage pump shines:
Efficient Mine Dewatering
Enhancing High Density Living Environments
Innovative Snow Making Solutions
Reliable Boiler Feed Systems
Cutting-edge Reverse Osmosis Processes
Diverse Industrial Applications
Effective Condensate Management
High Pressure Cleaning and Wash Down Facilities
Powerful Jacking Pumps for Fire Hydrant Systems
Efficient Irrigation and Fire Hose Feel Supply
Luxurious Shower Experiences
Advanced Co-Generation Operations
Precision Spray Applications
Comprehensive Pressure Boosting Solutions

Facilities & Equipments

Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal
Versatile Horizontal Boiler Feed Pump with Robust Mechanical Seal

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.

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