Pumping Technology


Pump Improves Efficiency for Severn Trent Water Mono® (UK) to pump digested sludge to the site’s centrifuges for thickening.


As part of an initiative to improve process efficiency at its sewage treatment works in Nottinghamshire, England, Severn Trent Water has installed a Chroma progressing cavity (PC) pump from NOV®


This major water supplier had been experiencing problems with the reliability of its previous pump gearboxes which were causing significant downtime at the plant


and de-ragging the pump was also problematic due to the small access port which provided limited access. Requiring a safe and cost effective solution fast, Severn Trent Water turned to Mono for the answer. Mono supplied its Chroma PC pump, which was delivered on a


quick lead time, competitively priced and more importantly, was directly interchangeable with the existing pump so required no additional pipework modifications. Regional Maintenance Advisor at the treatment works, Andy Berry, commented: “The Mono Chroma provided us with an effective solution. As well as benefiting from


improved control over the process with a variable speed drive, de-ragging is much easier and we can take advantage of excellent spares lead times and pricing due to Mono being a UK based manufacturer.


“We have a superb working relationship with the Mono team and a strong framework agreement. We couldn’t be happier with the solution they have provided for us.” Mono’s Chroma pump is an industrial progressing cavity pump which has been designed to be directly interchangeable with pumps from other PC pump suppliers.


The Mono Chroma is cost effective, easy to install and can ease the burden of maintaining existing assets from other providers. With no pipework or electrical modifications required, the Chroma has full size access ports as standard to enable easy de-ragging of the pump, without having to remove from the pipework. It is also designed


to meet all Water Plc and WIMES industry standards, offering peace of mind to the end-user.


It is available in cast iron and 316 stainless steel casing parts, with wetted parts available in tool steel or 316 stainless steel. The pump comes complete with efficiency one geared-motor that complies with Enhanced Capital Allowance (ECA) scheme and a five year warranty as standard.


Reader Reply Card No 108 New Pumping Stations for India


The Indian state of Andhra Pradesh has been hit time and again by widespread drought, particularly in the years 2002 to 2004. As some 70% of the population makes a living directly or indirectly from agriculture, the Indian government launched the Jalayagnam project for irrigation of agricultural land. The Pumps Division, a part of the ANDRITZ HYDRO business area of the international technology Group ANDRITZ, is contributing to a total of eleven sub-projects in this large venture, which is also to build numerous pumping stations on greenfield sites in the next five years.


In order to transport water over long distances, very large volumes


of water are conveyed typically with a small number of large vertical volute pumps. For the Bheema sub-project, ANDRITZ (Germany) supplied three vertical volute pumps each for two pumping stations in the second half of 2008. Construction of these pumping stations is now in the closing stages and start-up will follow shortly. The first of


these, with three units, conveys a total of 63 m³/s water to a level 38 m higher up. There, some of this water is distributed through canals. Then a second pumping station pumps approximately 32.3 m³/s into a canal system that is 22 m higher up. The pumps are driven by synchronous motors with nominal ratings of 12 MW and 4 MW, respectively. These pump units are designed with a three-bearing concept, where each pump has one guide bearing in the motor, one at the pump impeller, and a combined thrust and guide bearing between pump and motor. Volute and draft tube of the pump are steel structures embedded in concrete.


The special aspect of the pumps supplied is that they are very similar to turbines due to their size and the integrated guide vane


mechanism. The guide vane mechanism is adjusted by means of a hydraulic servomotor to suit the changing tailwater level. This achieves a broader efficiency progression compared to conventional pumps, as well as much lower power input on start-up of the pump if the guide vane mechanism is closed.


Reader Reply Card No 109


Transferring aggressive, explosive and toxic liquids at high pressures safely and efficiently, are among the most difficult pumping applications. Liquids handling specialists PUMP ENGINEERING have extensive experience in providing optimum solutions for difficult pumping applications, particularly with their range of 3M magnetically driven centrifugal pumps. The separation of these types of liquids from the atmosphere by means of an isolation shell is acknowledged as the most effective solution, while the seal-less design is the preferred choice for the chemical, pharmaceutical and petrochemical industries.


New Piston Diaphragm Pumps


The operating range of the new sera (Germany) piston diaphragm pumps for the series 510.1 is between 65 l/h to 1300 l/h at up to 200 bar and for the series 511.1 from 100 l/h to 1900 l/h at up to 220 bar. With these performance data, the new piston diaphragm pumps are qualified for a wide range of applications including the petrochemical industry. Due to the variable possible combinations, the pumps can also be adapted for many other application areas.


The new 510.1 and 511.1 stroke mechanisms are the basis of these new series which have been designed as variable eccentric drives. The stroke can be continuously adjusted here from 0% to 100% using a hand wheel or an actuator. In doing so, the repeat accuracy is below 1%.


Among other features the new 5series is equipped as standard with a high quality material multi-layer


diaphragm which guarantees reliable diaphragm rupture detection. In order to enable use in the crude oil conveying and processing industry, these pumps are also option available on the one hand for the explosion-protected area as well as in accordance with the API standard 675.


Reader Reply Card No 110


A recent example involves the CN M50-315 3M pump which has been successfully used in a research and development laboratory for an oil-field application. This required a pump to re-


circulate dense phase CO2 at flow rates up to 50mc/h at 30m, with a system pressure of 200 bar. The pump was made from carbon steel with a titanium rear casing and other parts manufactured from 316L stainless steel.


3M mag-drive pumps have no glands, seals or valves and


therefore provide reliable, leak-free operation, even in the most heavy-duty applications, such as pumping heat transfer oils and liquefied gases and at temperatures ranging from -150°C to +450°C. Other applications include transferring acids, alkalis, hydrocarbons, toxic and explosive chemicals in industrial and chemical industries. In the food and drink industries they are ideal for handling CIP chemicals, such as sodium hydroxide, nitric acid, hydrogen peroxide and pumping water treatment chemicals.


Reader Reply Card No 111


Solutions for Difficult Pumping Applications


$7.5 Million Abu Dhabi Oil Fields Pump Order


Flowserve (USA) have received an order worth approximately $7.5 million for Flowserve MP1 multiphase pumps from Abu Dhabi Company for Onshore Oil Operations (ADCO) for the Bida Al Qemzan field development project. The order was booked in the second quarter of 2010.


“This order continues our long history of providing solutions to the oil and gas industry in the United Arab Emirates,” said Tom Ferguson, president, Flow Solutions Group. “Given the challenging specifications for this project, we are very proud that ADCO chose Flowserve MP1 multiphase pumps. We are confident that the MP1’s ability to effectively pump mixtures of oil and natural gas will help ADCO maximise production at the Bida Al Qemzan field.”


ADCO selected Flowserve pumps due to their performance, reliability and ability to meet the high-pressure and corrosion-resistance requirements. The pump packages, which include the suction and discharge piping and drivers, are designed for 190 barg (2,750 psig) maximum allowable working pressure. The pumps are made of super-duplex stainless steel for corrosion resistance due to chloride content in the water of 47,800 parts per million.


Reader Reply Card No 116


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www.pollutionsolutions-online.com • Annual Buyers’ Guide 2011


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