centrifugal pump Articles
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How to read a Centrifugal Pump Performance Curve
This may seem a very basic topic but if you are new to selecting centrifugal pumps it is an essential skill to know how to read a Centrifugal Pump Performance Curve. Pump manufacturers will supply a performance curve detailing the following information: flow, head, power absorbed, efficiency and NPSH required. On all curves some essential information will be shown such as the pump model, speed ...
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What’s the Difference Between a JM and JP Shaft Extension?
Close-coupled centrifugal pumps are attached directly to the face of a motor. They use the motor’s bearing and shaft, which makes these pumps more compact and economical. By contrast, frame-mounted pumps have their own bearing frame. For some applications, close-coupled centrifugal pumps are the clear best choice due to the lower cost and a smaller footprint. In this article, we are ...
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Basic knowledge of pump impellers
The key element of a centrifugal pump is the impeller which rotates in a pump casing. The pump impeller is equipped with blades and is mounted on the pump shaft. The design of the impeller greatly influences the pump performance and the types of fluid that can be pumped. The shape, number of blades, dimensions and rotational speed have a major influence on the pump head, capacity and the ...
By BBA Pumps BV
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What is a centrifugal pump?
What is a centrifugal pump? A centrifugal pump is a mechanical device designed to move fluid by rotating energy from one or more driven rotors called impellers. The fluid enters the rapidly rotating impeller along its axis and is discharged by centrifugal force along its circumference through the blade tip of the impeller. The action of the impeller increases the velocity and pressure of the ...
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ANALYSIS OF PUMP VIBRATION AND NOISE
The principle of the centrifugal pump is simply that when the impeller rotates at a high speed, the liquid between the blades is driven to rotate. Due to the centrifugal force, the liquid is thrown from the center of the impeller to the outer edge of the impeller. The flow channel gradually expands, the liquid flow rate gradually decreases, and part of the kinetic energy is transformed into ...
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Pump Performance Curve & System Curve
We recently wrote an article on how to read the information presented on a standard centrifugal pump performance curve and to develop this further we need to examine how this relates to the system curve. So, what is the system curve? This plots the head in terms of the static head (that does not change) in addition to the pressure loss through the system that will increase as the flow rate ...
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Overview of Sanitary Pump
Sanitary pumps involve the delivery of all human contact products such as pharmaceuticals, dairy products, beverages, food products, cosmetics, food additives, fine chemicals and the like. There are four types of sanitary, centrifugal, volumetric, jet and air pumps. Centrifugal pumps apply centrifugal force to create velocity, using a rotating wheel to increase speed and push fluid through the ...
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Multiphase pumps for energy-efficient water and wastewater treatment
Multiphase pumps are unique products with outstanding features compared to conventional centrifugal pumps. The approach consists of using the pumps not only for transport of liquids but also for partial gas supply and as dynamic mixer for gas enrichment. Therefore this novel pump conception barely has something in common with a standard pump. Even the mode of operation does no longer ...
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Impeller Selection: Semi-open vs. Enclosed
Enclosed and semi-open impellers are both widely used in centrifugal pump design. While enclosed impellers are typically considered more efficient, both designs have merits and are suited for different applications. In this discussion, we will be addressing single-inlet impellers, which are typically used for end-suction style ...
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EDUR Multiphase Pumps for energy-efficient water and wastewater treatment
Multiphase pumps are unique products with outstanding features compared to conventional centrifugal pumps. The approach consists of using the pumps not only for transport of liquids but also for partial gas supply and as dynamic mixer for gas enrichment. Therefore this novel pump conception barely has something in common with a standard pump. Even the mode of operation does no longer comply ...
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Factors affecting Pump Efficiency
The overall efficiency of a centrifugal pump is the product of three individual efficiencies: mechanical, volumetric, and hydraulic: Mechanical efficiency Mechanical efficiency includes losses in the bearings (long couples pumps), stuffing box (in the case of packed gland pumps) and mechanical seals. Volumetric efficiency Volumetric efficiency will include internal losses due to leakage ...
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Pumps for energy-efficient water and wastewater treatment
Multiphase pumps are unique products with outstanding features compared to conventional centrifugal pumps. The approach consists of using the pumps not only for transport of liquids but also for partial gas supply and as dynamic mixer for gas enrichment. Therefore this novel pump conception barely has something in common with a standard pump. Even the mode of operation does no longer comply ...
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Dangers of Cavitation in Piping Systems & How to Avoid It
Cavitation is a hot topic for engineers, maintenance professionals and anyone who works with pumping systems—and for good reason. This condition has complicated and difficult-to-identify causes, and its effects can be devastating to equipment, system integrity and overall operations. Preventing cavitation is a full-team effort when it comes to systems operated with centrifugal pumps. It ...
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The Versatility of Hydraulic Submersible Pumps
Hydraulic submersible pumps offer flexibility and performance When determining a pump for an application, there are a number of factors to consider. Hydraulic submersible pumps are an option and give the added benefit of run dry capability, especially when electric powered pumps are of concern due to potential electrical hazards or other reasons, or diesel driven centrifugal pumps are not ...
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Application Analysis of Micro Pumps in Various Industrial Printers
With the continuous progress of technology, various types of industry printers have significantly improved in meeting diverse needs. Micro pumps, as a crucial liquid delivery device, play an essential role in various printers. 1. Diaphragm Pump Diaphragm pumps use the bending of a diaphragm to drive fluid transfer, and their precision and controllability make them ideal choice for inkjet ...
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Energy-efficient Cooling System for Musikkens Hus (House of Music)
DESMI has delivered and installed highly efficient pumps, pipes and wells for intake of water from the fiord for the cooling system of Musikkens Hus. Musikkens Hus is known as the musical gathering point of Northern Denmark and covers more than 20,000 m2 distributed on nine storeys and among other facilities it hosts four concert halls, five stages, a restaurant, and educational and ...
By DESMI A/S
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DESMI Pumps for HVAC in Sharjah, UAE - Case Study
DESMI has supplied a series of eight NSLH End Suction Centrifugal Pumps for the Umm Al-Qura building located in Sharjah at the Al Mamzar beach. The NSLH pumps will be providing 198 differently sized apartments with cooling. The residential building has 22 floors + 5 floors for car parking and is located at the Al Mamzar beach. Sharjah is the third largest and third most populous city in the ...
By DESMI A/S
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Submersible Pumps vs. Self-Priming Centrifugal Pumps
When selecting a centrifugal pump for bypass work, the first consideration should be NPSHR by the pump. Neglecting the NPSHR of the pump is the single most common mistake when choosing a self-priming or priming assisted pump. A function of the pump design requires part of the 33.9 ft (14.7 in.) available as further defined in this article. A centrifugal, and in a way submersibles, require part ...
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Variable Speed Pumps
We often get asked for a pump to achieve multiple duties points. This is often seen as minimum, normal and maximum flow rates with corresponding calculated heads. This can make it quite tricky to efficiently select a centrifugal pump, as a fixed speed curve will increase flow whilst decreasing generated head. In reality the pump may very rarely see the maximum duty point and so it very rarely ...
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How to increase discharge pressure of centrifugal pumps
There comes a time in every good pump systems’ life where what once was adequate is now not good enough. The flow needs to increase, the lines get extended, or the operators just need that bit of extra momentum on the discharge. As pump experts, this isn’t the end of the world, we have several levers we can pull to help get that extra bit of pressure out of the pump and increase ...
By Global Pumps
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