Materials Handling
The Verderflex development team responded to feedback from customers by identifying the crucial utility and critical features of their pumping systems, which they felt could be improved. The company responded with the Dura 45, a pump
developed through examining hundreds of customer processes and nearly two years of testing and refinement. According to company, the results of these tests have
shown a genuine class-leading fluid-handling performance, high quality design through meticulous attention to detail of every component and assembly, and a safer, more reliable pump that can be trusted in customers’ processes. The Dura 45 is suitable for medium flow applications of /h in fluid handling applications including acids,
up to 12m3
alkalis, oily and fatty liquids, polymers and lime. The overall Dura family is suitable for all types of slurries, sludge, viscous liquids and many other traditional applications. The Dura 45 pump is also suitable for special conditions
where suction lift is required, where the pump needs to be truly self-priming or a compact footprint is required. Should a site’s floor space be restricted, a Verderflex Dura pump can be mounted in any orientation for the most efficient use of plant floor space. The Dura range is also the first choice pump for chemical
dosing systems at sewage treatment works and in major utility installations completed by contractors and the Verder UK Pumping Systems service team. In terms of performance, Verderflex says the new pump
has surpassed all expectations during testing to deliver best- in-class results compared to any other peristaltic pump brand. This includes increased flow rate, delivering 25 per cent more fluid per revolution than the nearest competitor’s equivalent model. This equates to 300 fewer revolutions needed to pump 2000 litres. The company also says that a Dura 45 can deliver higher flow rates flow rates than equivalent pumps for all pressures up to 16 bar. The new design features extremely long-life build quality
with an optimum number of reinforcement fibres, plus a textured outer for distribution of lubricant. In addition,
Longer lasting hoses G
raco says that its peristaltic hose pumps are ideal for industrial metering and transfer. These positive displacement hose pumps rotate a full 360° and use a single roller to compress the low friction hose once per revolution so that hoses last longer and users have less maintenance and downtime. The company’s peristaltic hose pumps are used at municipal and industrial sites – wherever fluids are metered, dosed, or transferred from one place to another. Graco’s customers solve novel and complicated problems such as handling bleach, corrosive and abrasive slurries, acids, alkali, colourants, inks and other difficult to pump solutions.
24
www.engineerlive.com
In terms of products on offer, the EP2 Series hose pump has a maximum flow rate of 2.1 gallons/minute (7.9 litres/minute) and is ideal for chemical metering applications. The EP3 Series hose pump comes with a maximum flow rate of 6.2 gallons/minute (23.6 litres/minute) and is aimed at chemical metering and sanitary applications.
Meanwhile the EP4 Series hose pump can cope with a maximum flow rate of 19.5 gallons/ minute (73.8 litres/minute) – ideal for abrasive material transfer applications.
The design of the EP4 Series utilises a single oversized roller that compresses a low friction hose through a full 360° of rotation. This
innovative design means longer hose life when pumping caustic, abrasive or sensitive materials for metering or transfer.
Other benefits cited by Graco for this type of pumping include: 50 per cent more flow per revolution than conventional designs; one hose compression per revolution to improve hose life; no moving parts in the fluid stream; inexpensive to maintain – no valves, seals or glands; pumps are reversible and can be used to empty lines or clear blockages; integral drive and motor can run as low as one rpm; compact design, ideal for tight spaces and flexible placement; ‘quick change’ one-piece hose clamp assembly; and quick replacement of hose and lubes. ■
precise wall-thickness throughout the length of the pump is assured by checks for consistency, finish, small cuts and imperfections. Another design feature is the patented, innovative
flange system for fast changing of hoses and containment of chemicals. This includes a quarter lock system for quick removal of flanges for hose changes. The two-piece liner flange uses polypropylene and polyvinylidene fluoride (PVDF) inserts for chemical options. Meanwhile, the PVDF/316 stainless flange outer gives far higher nozzle load rating than weak bracket designs. Also new is the improved front casing with captive screws,
fully supported rotor shoes to prevent cracking, a robust mounting frame for stability and resistance to corrosion, and a typically 16 per cent smaller footprint than similar peristaltic pumps.
Synchronised flows Meanwhile, Ledebuhr industries’ AccuStaltic multi-channel peristaltic pumps are positive displacement pumps that accurately produce synchronised flows of any liquid with no valves, seals or pistons. They simply squeeze the liquid out of a flexible tube,
with precision rollers, in a continuous or cyclic rotary motion. The fluid only contacts the inside of the resilient tubing. AccuStaltic pumps are also specifically designed to use multiple tubes simultaneously. The pumps range from 4-12 individual flow channels
which can be combined with different manifolds and tubing to create flows from single continuous flows up to 180 litres/ minute to 12 accurately metered individual flows of as little as 0.5 ml per cycle. AccuStaltic pumps are self-priming, non-cavitating, and
can be run dry with no pump damage. Other benefits include accuracy, a patented design that
prevents tube swell in older tubes, double sealed bearings that avoid contamination, replacement parts available off-the-shelf, and ease of inspection because the pump does not have to be disassembled to do this. ■
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50