Durable Electric High Pressure Boiler Feed Pump with Flexible Coupling

• 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 remarkable lineup of single-suction, multistage segmental centrifugal pumps, specifically engineered for the conveyance of water and fluids sharing similar physical and chemical characteristics, devoid of solid particulates. The SHD variant efficiently handles fluids with temperatures up to 80 ºC, making it an ideal choice for mining operations, manufacturing facilities, and urban drainage systems. Meanwhile, the SHDG model is adept at managing fluids with temperatures reaching 105 ºC, serving perfectly as a boiler feed pump or for transporting hot water in various applications.

Structural features
Crafted with precision, the SHD and SHDG pumps are comprised of a stator, rotor, bearings, and a shaft seal, ensuring robust performance and longevity.
1, Stator part: The stator is a crucial element, constructed from the inhalation, middle, and spit sections, complemented by guide vanes. These are firmly secured with tension bolts, facilitating a smooth operation. Notably, the SHD-type pump boasts a horizontal inlet and a vertical outlet, while the SHDG type is designed with both inlet and outlet positioned vertically.
2, Rotor parts: This segment includes the shaft, impeller, balance plate, and bushings, all working in harmony. The shaft effectively transmits power to the impeller, ensuring optimal functionality. Moreover, the axial force is meticulously balanced by the balance plate. Both ends of the shaft are fitted with replaceable shaft sleeves to provide additional protection.
3, Bearing part: The bearing system offers two types—rolling and sliding bearings:
The sliding bearing assembly consists of the bearing body, caps, dust disk, oil level gauge, and rejection mooring rings, all lubricated with thick oil. On the other hand, the rolling bearing assembly, comprising the main body, bearings, and gland, benefits from grease lubrication, ensuring smooth operation.
4, Shaft seal parts: Equipped with either a mechanical seal or a packing seal, the system incorporates water segments and sealed body filler, reinforced by retaining ring components within a tail cover letter. The seal chamber liquid functions as a water seal, providing both cooling and lubrication. The SHD pump derives its seal water from the pump's own pressure, while the SHDG utilizes cooling water from an external source. Ensuring optimal performance, the seal water pressure should exceed the seal chamber pressure by 0.05-0.1MPa, with cooling water pressure maintained at 0.15-0.3MPa.

Moreover, the pump is seamlessly driven by a prime motor through a flexible coupling, with a clockwise rotation viewed from the prime motor end, ensuring consistent and reliable performance.

The SHD and SHDG pumps offer versatility in operation, capable of being powered by either an electric motor or a diesel engine, accommodating diverse industrial needs.

Detailed Photos

In the world of multistage centrifugal pumps, the high thrust generated by impellers aligned in the same direction necessitates the use of a sophisticated thrust balance device. This could be a balance disc or a balance drum, ingeniously designed to reduce the thrust to levels manageable by a standard-sized thrust bearing, ensuring seamless and efficient operation.
Our impellers are crafted from a selection of robust materials, including cast iron, cast steel, stainless steel, and bronze. Each material is chosen for its unique properties to meet varying operational demands and enhance the pump's durability and performance.

Flexible couplings
Unlike their rigid counterparts, flexible couplings are engineered to accommodate movement such as vibrations and thermal expansion without sustaining damage. This makes them exceptionally suited for applications where slight misalignment between the drive and pump shafts is unavoidable. Their ability to absorb vibrations not only protects the machinery but also reduces operational noise significantly. Although their design is more complex and costly, the long-term benefits include substantial maintenance savings as they safeguard the shaft and bearings from premature wear and damage.
Our wear-resisting disc coupling or pin coupling options provide superior durability and performance, tailored to withstand the rigors of demanding applications.

Packing seals have long stood as the cornerstone of sealing solutions. These seals utilize rope-like materials wrapped snugly around the pump shaft to fill dead spaces and minimize fluid loss. However, as time progresses, these materials tend to wear, leading to increased fluid loss and potential challenges in lubrication or ease of replacement. Regular maintenance becomes crucial to maintain efficiency.

In applications where leakage prevention is paramount, mechanical seals are the preferred solution over traditional packing seals. Built to withstand rigorous conditions, these seals offer enhanced durability and feature multiple sealing points designed to effectively eliminate leakage issues, providing superior performance and reliability.

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 Durable Electric High Pressure Boiler Feed Pump with Flexible Coupling is an essential component in systems where pressure boosting is paramount. These systems often require a reliable and constant flow to maintain optimal performance. Below are some common projects and scenarios where our horizontal multistage pumps are indispensable:
1. Mine Dewatering: Efficiently manage water levels in mining operations with consistent, high-pressure performance.
2. High Density Living: Ensure robust water supply in urban residential complexes, maintaining comfort and convenience for all inhabitants.
3. Snow Making: Generate pristine snow with uniform pressure, perfect for ski resorts and winter attractions.
4. Boiler Feed Systems: Deliver precise water pressure to boiler systems, ensuring safe and efficient operation.
5. Reverse Osmosis: Optimize water purification processes, providing superior filtration efficiency.
6. Industrial Applications: Cater to a wide array of industrial needs where high-pressure operations are crucial.
7. Condensate: Effectively handle condensate recovery, promoting energy efficiency and sustainability.
8. High Pressure Cleaning/Wash Down Facilities: Achieve thorough cleaning with unmatched high-pressure capabilities.
9. Jacking Pumps for Fire Hydrant Systems: Provide reliable support for fire safety systems, ensuring readiness in emergencies.
10. Irrigation and Fire Hose Reel Supply: Facilitate efficient water distribution in agricultural and fire safety systems.
11. Showers: Enhance water pressure for a superior showering experience, combining luxury with practicality.
12. Co-Generation: Support energy-efficient systems by maintaining consistent water pressure in co-generation applications.
13. Spray: Deliver precise spraying performance in various industrial and agricultural settings.
14. Pressure Boosting: Experience unmatched pressure enhancement, ensuring optimal performance across diverse 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.