Centrifugal Pumps

Lorentz was established in Hamburg, Germany, and has been a quality designer and manufacturer of Solar Pumps since 1993. Through the innovative electronic controlling, outstanding manufacturing quality and a simple design, Lorentz has managed to reduce the high cost of solar water pumping.

Lorentz’s submersible helical rotor pumps consist of only two parts, Lorentz’s brushless motors are water filled and maintenance free, while the electronics are not inside the submerged motor but easily accessible on the surface.

The helical rotor solar pump can deliver up to 39,000 litres of water per day, and the centrifugal pump can deliver up to 137,000 litres of water per day. These pumps can lift water up to 240 metres, which is astounding for a solar pump.

Source and more info: ferret

As consumers and manufacturers of all kinds of products, we are often asked to sort out the claims and counterclaims of advertisers and marketers. That’s understandable and will continue in any competitive society. Being informed and focused, and always aiming to “compare apples with apples” is both beneficial and appropriate. A good example of the “apples to apples” axiom is the European technical publication wherein an engineer from the United Kingdom reported on the adverse effects of moisture intrusion on bearing life. He made a reasonable point that users must guard against lube contamination and that bearing protector seals incorporating the rotating labyrinth principle make economic sense.

Here’s a way to quantify bearing life with and without a contaminated lubricant.

Source and more info: machinerylubrication

f anything helps make the wheels of industry run smoothly it has to be today’s bearing technology. However, it’s not just industry’s wheels that rely on modern bearings for their reliable operation. Virtually every rotating element in plant and machinery will be supported by some type of bearing to ensure its smooth running and long service life.

In fact, so ubiquitous is the modern bearing that it is generally considered as little more than a commodity product, to be kept in the stores until needed for routine maintenance.

But the reason so many bearings bought as spares can be found languishing on those store shelves is in itself a tribute to the significant developments made in bearing technology - developments that have kept pace with the rapid changes in production and process systems brought about by the growing demands for greater productivity, reliability and performance.

Not far behind bearings in heading up most plants’ inventories of parts or components would be the humble electric motor, which naturally needs its own bearings.

Some motors are less humble than others, however, and the most common type of bearing in very large electric motors is a combination of hydrodynamic bearings (often called sleeve or plain bearings) and housings.

Source and more info: manufacturingtalk

Invensys has won a contract - to supply four Triconex centrifugal pump steam turbine speed and overspeed control systems for use on the world’s largest liquefied natural gas (LNG) project.

Known as the Qatargas II Project, this 9.5 billion Euro project involves expanding the LNG liquefaction plant at the Ras Laffan Industrial City in Qatar. The project will further develop the large gas reserves in the country’s North Field. These are estimated to be in excess of 900 trillion cubic feet, or over 9% of the world’s proven reserves.

The project also involves construction of two of the world’s largest LNG trains. When these come on line in late 2007 and early 2008, the project will process 30 billion m³/y of gas, 15.8 million t/y of LNG, 6 million t/y of condensates and 1.7 b t/y of propane and butane. The LNG will then be exported to a dedicated receiving terminal in Milford Haven, West Wales, UK. The LNG will be carried by a new fleet of LNG carriers, currently under construction as part of a 1.3 billion Euro contract awarded to three South Korean shipyards.

Each of the four cabinet-based control systems supplied by Invensys is responsible for one turbine-driven boiler feed water pump on the new project.

The design, control and operation of these pumps is identical. Each is based on the Triconex TS3000 turbomachinery control solution and includes communications modules to connect to a distributed control system (DCS) and Invensys’ Wonderware InTouch human machine interface (HMI).

Each cabinet includes Triconex technologies such as an Electronic Steam Turbine Governor System, a Speed System, Turbosentry Overspeed Protection, application software, and a panel-mounted PC with touch screen display for the Wonderware InTouch based HMI application.

In particular, the Triconex Electronic Steam Turbine Governor System comprises the Tricon version 10 main chassis and houses two 120V AC high density power modules, three main processors, Tricon Communication Modules, and the digital and analogue I/Os.

As well as benefitting from the integrated functionality and long experience of turbine system control brought by Invensys, this project will also benefit from the use of the company’s Triple Modular Redundant (TMR) technology.

Source and more info: pandct

TWO new Loctite guides make surface engineering for the rebuilding, repair and protection of industrial equipment and the rebuilding of industrial pumps simpler for users.

Designed to fit the needs of the maintenance professional, Loctite’s Surface Engineering Solutions covers topics starting with surface preparation, progressing through techniques for the repair and rebuilding of metal, rubber, concrete, wet surfaces, and surface protection using the range of Loctite Nordbak and Fixmaster products.

The full-colour publication provides specialist information, tips and tricks, case histories and selection tables to enable users to confidently choose the correct product and obtain professional results.

Loctite’s Industrial Pumps Rebuild and Maintenance Guide is an invaluable tool for pump repairers. This 64-page, full colour guide explores virtually every area where centrifugal pumps are known to fail, then provides working solutions, easy repair steps and a summary of the benefits gained by using Loctite and Fixmaster products during the process.

Source and more info: ferret

Vanderbilt engineers are a key part of the team in an ambitious national effort to advance the field of fluid power, which could lead to reductions in fuel consumption, state-of-the-art rescue robots and new devices to aid people with mobility impairments.

The National Science Foundation Engineering Research Center for Compact and Efficient Fluid Power is funded by a $15 million five-year grant from the NSF, and augmented by $3 million from various industry partners. The center will be directed by the University of Minnesota.

Fluid-power technology encompasses most applications that use liquids or gases to transmit power in the form of mechanical work or pressure. The complexity of these systems ranges from a simple centrifugal pump used to remove water from the basement of a house to sophisticated airplane controls that rely on high-pressure hydraulic systems. Fluid power is a $33 billion industry worldwide. Industry areas include aerospace, agriculture, construction, health care, manufacturing, mining, and transportation.

“Back in the 1950s and 1960s, the United States led the world in fluid-power research, but now Europe and Asia have passed us by,” said Kim Stelson, the director of the new research center and mechanical engineering professor at the University of Minnesota. “We hope that this new center will get us back on track in this growing field.”

Source and more info: vanderbilt

Chem Resist are pleased to announce that their PW, PWF, PW-C and PW ranges are available in ATEX approved versions. Due to the Chem Resist commitment to delivery and service, they hold large stocks of pumps and are able to offer quick deliveries, refurbishment services and spares directly from their stores in Dewsbury in West Yorkshire. This means that Chem Resist can offer ATEX approved thermoplastic chemical pumps in the UK and Europe over a wider range of applications than before.

The range of chemical pumps that Chem Resist support covers flows ranging from 1 Litre per minute to over 800m3 per hour.

With over 30 years experience in the transfer of aggressive chemical transfer application Chem Resist have solved a host of problems in chemical, food, pharmaceutical, steel and wire and automotive battery applications, the chances are that Chem Resist have seen your application or something similar before.

Source and more info: processingtalk

Assoma has improved the patented Dry-run Design of its AMX series through a more efficient cooling system. The design of the magnetically driven pump ensures low mechanical loss and therefore high efficiency. The pump made of synthetic and ceramic materials was designed for aggressive media.

Improved dry running, a high hydraulic efficiency and media resistance are the highlights of the new
magnetically driven centrifugal pump series ASV-MAX by ASV Stübbe. The leakage and emission free design is realised in sizes 40×40 und 65×50 for flows up to 39 m³/h and delivery head is up to 34 m.
Using permanent magnets with high energy density allow for a high efficiency. For media that crystallize out ASV Stübbe specially designed the Etching pump. Crystal deposits that build up inside the pump are destroyed by a special labyrinth. In this dry run pump, the shaft crossover into the atmosphere was sealed with a special PTFE lip seal.

For toxic media with special shaft seal requirements the horizontal magnetic drive centrifugal pump MPCHDryRun by Bungartz is a perfect option. The permanently dry running construction is also suitable for solids and gases. The robust, lifetime lubrication rolling bearing and vortex free magnetic drive work independently of the pumped fluid for 3 years without maintenance. Between the back side of the impeller and the shaft bearing there is a labyrinth medium free area filled with barrier gas. This represents a heat barrier with high temperature gradient and therefore ensures low storage temperatures.

NCR by Dickow Dickow Pumpen has remodelled its NCR series and adapted it to the 9th edition of the API 610. The pumps were designed for applications in the chemical, petrochemical and similar industries. Because of a wide ranging materials selection and the possible inclusion of any shaft sealing system according to API 682, these pumps are suitable to deliver almost all media used in these industries. Examples are acids, alkali, chlorinated hydrocarbon, heat transfer oils, fuels, liquid sulphur, plastic fusion, bitumen etc. Worth mentioning is the integrated inducer which realises especially low NPSH values.

Source and more info: impeller

Knoll America, an industry leader of high pressure machine tool coolant and filtration components, is pleased to announce that it has expanded its coolant pump line.

Available for submersible and dry mount applications, these multi-stage, stainless steel, centrifugal pumps offer both superior service life and cost reduction to the customer.

Used mainly by the machine tool industry to pump coolant to the tool and machining surface to cool the area and flush away chips, Knoll pumps operate in the pressure range to 350 PSI and flow range to 100 GPM.

Knoll America is a single-source supplier for chip removal and contaminated fluid filtration elimination. Knoll has one goal: an economic, customized, complete solution with high customer benefits.

Source and more info: thomasnet

LS Industrial Systems is offering its iP5A series of HVAC variable speed drives. The range is specifically designed to cater for building airconditioning systems and centrifugal pump installations, incorporating Metasys and other HVAC orientated protocols. A fan/pump speed reduction of 20% requires only 64% of the full speed load. Similarly, a fan speed reduction of 30% will require only 49% of the rated full speed load.

This square law characteristic makes the use of the standard VSDs uneconomical, as their output stages are designed to handle high overload currents. With the output stage typified for HVAC applications, a significant reduction in drive cost has been made possible. The new LS iP5A range includes all the sought-after protection including short-circuit proofing earth-leakage proofing (on the run), plastic coated circuit boards, etc.

Source and more information: instrumentation