Robust High Pressure Boiler Feed Pump for Horizontal Mining Operations

• 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 embody the pinnacle of engineering excellence, featuring a single-suction multistage segmental type centrifugal pump designed to transport water or fluids with similar physical and chemical properties devoid of solid particles. The SHD model is adept at handling fluids with temperatures below 80 ºC, making it ideal for applications in mining, factory operations, and urban drainage. On the other hand, the SHDG variant is engineered to accommodate fluids up to 105 ºC, perfectly suited for boiler feed applications or the transfer of hot water in various industrial scenarios.

Structural Features
Both SHD and SHDG pumps are meticulously constructed from a robust stator, dynamic rotor, precision bearings, and advanced shaft seal engineering.
1. Stator Part: This section is predominantly composed of the inhalation, middle, and discharge sections, alongside guide vanes, all securely clamped with tension bolts to ensure seamless operation. The SHD-type pump is designed with a horizontal inlet and vertical outlet, while the SHDG model features both vertical inlet and outlet configurations.
2. Rotor Parts: These integral components include the shaft, impeller, balance plate, and protective bushings. The shaft effectively transfers power to the impeller, enabling efficient operation. Axial forces are expertly counterbalanced by the balance plate, while the shaft's ends are safeguarded by replaceable sleeves.
3. Bearing Part: Two types of bearings are utilized, namely rolling bearings and sliding bearings, each offering distinct advantages:
Sliding Bearings: Comprised of the bearing body, caps, dust disk, oil level gauge, and rejection mooring rings, these bearings ensure optimal function with thick oil lubrication. Rolling Bearings: Featuring a robust body, bearings, and gland, these are lubricated with high-performance grease, enhancing durability and efficiency.
4. Shaft Seal Parts: This section employs either mechanical or packing seals, constructed from water segments and sealed body fillers, with retaining ring components at the tail cover. The seal chamber's liquid serves as a water seal, providing cooling and lubrication. For the SHD pump, seal water is derived from the pump's internal pressure, while the SHDG model sources seal water from an external cooling system. It's crucial that the seal water pressure exceeds the chamber's by 0.05-0.1MPa, with cooling water pressure maintained at 0.15-0.3MPa.

Additionally, the pump is seamlessly driven by a prime motor via a flexible coupling, ensuring smooth clockwise rotation when viewed from the prime motor's perspective.

The versatile SHD and SHDG single-suction multistage segmental type centrifugal booster pumps can be powered by either an electric motor or a diesel engine, catering to diverse operational requirements.

Detailed Photos

In the dynamic world of multistage centrifugal pumps, the substantial thrust generated by impellers aligned in a singular direction necessitates a sophisticated thrust balance device, such as a balance disc or balance drum. This high-performance component expertly minimizes thrust to a manageable level, ensuring that the standard-sized thrust bearing can comfortably sustain the load, prolonging the life and efficiency of the pump.
Our state-of-the-art impeller materials are available in a variety of robust options, including cast iron, cast steel, stainless steel, and bronze. Each material selection is designed to offer enhanced durability and performance tailored to your specific operational needs.

Innovative and Flexible Couplings
Unlike their rigid counterparts, flexible couplings are engineered to accommodate a range of movements, such as vibrations and thermal expansions, without sustaining damage. This adaptability makes them the perfect choice for scenarios where unavoidable misalignment occurs between drive and pump shafts. Notably, their ability to absorb vibrations efficiently also plays a pivotal role in minimizing excessive operational noise. Although their intricate design is more complex and incurs higher initial costs, flexible couplings offer significant long-term maintenance savings by safeguarding shafts and bearings against damage and premature wear.
Our cutting-edge solutions include the use of wear-resistant disc couplings or pin couplings, delivering resilience and long-lasting performance.

Packing seals, renowned for their reliability, have long dominated as the go-to sealing solution. Utilizing rope-like materials, they snugly wrap around the pump shaft, effectively filling dead space to minimize fluid loss. However, as time progresses and gland packing materials wear down, fluid loss may increase, potentially affecting regular lubrication and ease-of-replacement, which are vital for the seal's optimal functioning.

In challenging applications where leakage is a critical concern, mechanical seals stand out as the superior choice over traditional packing seals. These modern seals boast enhanced durability and are crafted to endure substantial stress. By employing multiple sealing points, basic mechanical seals virtually eradicate leakage issues, providing a reliable and efficient sealing solution for a wide array of applications.

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-performing pumps are essential in pressure boosting systems, ensuring a steady and robust flow with unwavering pressure. These pumps are indispensable for an array of dynamic and demanding projects including, but not limited to:
Mine dewatering - Essential for maintaining optimal conditions in mining operations by efficiently removing excess water.
High density living - Perfectly suited for urban environments where consistent water pressure is crucial for residential satisfaction.
Snow making - Ideal for ski resorts, these pumps ensure efficient and reliable snow production.
Boiler feed systems - Designed to provide reliable feed water supply to boilers, maintaining efficiency and safety.
Reverse Osmosis - Ensures effective filtration, supplying pure and clean water by supporting reverse osmosis processes.
Industrial applications - Versatile and robust for a wide range of industrial uses, meeting the demands of various sectors.
Condensate - Facilitates the movement and processing of condensate, optimizing system performance and efficiency.
High pressure cleaning/wash down facilities - Provides the power needed for thorough and effective cleaning solutions.
Jacking pumps for fire hydrant systems - Integral to fire safety, these pumps ensure reliable water supply in emergency situations.
Irrigation and fire hose feel supply - Designed for optimal performance in supplying water for agricultural irrigation and fire safety applications.
Showers - Ensures consistent and enjoyable water pressure for personal and commercial shower systems.
Co generation - Enhances energy efficiency in co-generational setups, providing seamless and reliable operation.
Spray - Perfectly tuned for spray applications, delivering precise and controlled water distribution.
Pressure Boosting - Delivers impeccable performance for boosting water pressure in various settings, from residential to industrial.

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.