Generators and compressors are important equipment within a quarry operation, and there are many new models available, as Guy Woodford reports.
The company’s new Stage IV compliant 12/154 model is its largest single axle portable compressor and the successor to the previous 12/150 model.
The new 12/154 compressor is again powered by the
Incorporating the ‘built-to-be-used’ design common to all Doosan compressors, the 12/154 is said to provide the highest levels of durability, productivity and serviceability. The 12/154 has a free air delivery of 1
4.9m³/min (526 cfm) at an output pressure of 12 bar (175 psi) and offers a bunded base as standard for environmental protection, along with a well-positioned fuel tank featuring a large size filler to limit the risk of fuel spillage.
Meanwhile, Doosan Portable Power’s new 36kW 7/53 portable compressor replaces the previous 7/51 model. The new 7/53 compressor has been redesigned by Doosan so that it remains in the Stage IIIA category, avoiding the need to transition to meet Stage IIIB regulations.
The new 7/53 portable compressor supplies 5.0m3/min (177 cfm) of compressed air at 7bar (100psi) output pressure and is powered by a 4-cylinder mechanical turbocharged Yanmar liquid-cooled 4TNV84T-BMDP engine producing 36kW (49hp) of power at 2600 rpm.
Offering a reduced size, the 7/53 compressor has a length in the fixed height version of 3389 mm, a width of 1432mm and a height of 1,301mm. Other new features include integral forklift slots, increased fuel autonomy and a new bunded base option.
The options also include an integral 6kVA generator, which increases compressor flexibility by supplying electrical output in addition to compressed air. As a result, electrical tools or other appliances can be run in parallel with pneumatic equipment.
In a busy product launch period for Doosan Portable Power, the company is officially unveiling at bauma 2016 in Munich, Germany its G400-IIIA (400kVA prime power) and G500-IIIA (500kVA prime power) generators meeting the EU Stage IIIA engine emission regulations for generators. As well as incorporating the changes required to meet the Stage IIIA regulations, the new generators have been redesigned to offer increased reliability, high performance and a wider choice of features to meet the needs of temporary power applications.
The output performance stability of the generators is ensured by an optimised powertrain featuring a combination of
The fuel tank frame assembly, which ensures 110% fluid containment capacity, provides the highest operational flexibility available in the generator market. As fuel quality and storage are the main concerns for rental companies, routine fuel tank maintenance tasks have been simplified, with special attention to the fuel tank cleaning and port draining processes.
The new generators use powerful Leroy Somer alternators with the AREP excitation system, providing best-in-class motor-starting performance. This system is ideal for powering concrete and asphalt batching plants, major events or concerts, industrial processes and other applications with high load start-up demands and the need for a reliable power supply. To increase long-term reliability in harsh environments, the standard alternator configuration includes ‘heavy-duty’ protection for the rotor and stator windings.
Pascal Duponcheele, product manager generators and lighting systems at Doosan Portable Power, says that demand for generators is increasing in certain key markets, with France the most notable within Europe.
Atlas Copco has extended the power range of its popular QAS series of generators with the addition of the QAS 630. By incorporating the compact frame of the QAS 500, the QAS 630 can generate 20% more power without needing a larger footprint. The expanded QAS generator series provides complete, compact and fuel-efficient solutions from 14 to 630kVA, making this series the preferred choice for a wide range of applications throughout the world.
Julio Tome, product marketing manager for large generators at
Like other models in the QAS series, the QAS 630 boasts a compact and sturdy design in a rugged galvanized enclosure, which reduces noise levels and ensures reliable operation. In addition, the spillage-free frame minimises environmental impact.
The standard fuel tank has a capacity of over 900litres and is said to be able to provide power for a full work shift at full load. An optional long-autonomy fuel tank can extend the running time up to 24 hours, depending on load requirements.
To meet the frequent moving and multi-drop needs of the rental business, the QAS 630 facilitates easy transport, installation and storage with its small dimensions, balanced weight and strong base frame with forklift slots.
Said to be in keeping with the QAS development tradition, serviceability was a top priority in the product design and customer validation process. Large doors and removable service plates ensure superior accessibility and quick maintenance. Heavy-duty filtration systems allow for long service intervals to further reduce downtime.
Chicago Pneumatic has introduced a host of new optional features to its CPDG mobile diesel-powered generator range, including higher capacity fuel tanks, road trailer options and a galvanised skid, to provide contractors with enhanced portability, toughness and extended run-times.
The CPDG range is now available with a variety of tow bar and coupling combinations to fulfil the needs of different customers. Fully approved for use throughout the European Union, the new road trailer options mean the generators can be easily transported between sites without the need for major adaptations.
A new optional galvanised skid has been introduced to add extra robustness to the base-frame of the generators. It is specifically designed for applications where the unit will reside on uneven surfaces, or if it needs to be moved across the ground over short distances.
Tony Calippe, spokesperson for generators at
“For starters, do not oversize the generator more than what is necessary for the application. So many people that guess what size they need might actually want to side with the smaller size in order to keep the generator working harder. Sizing appropriately will help in other areas like fuel consumption as well.
“Another tip is to look for generators that feature a good starting ability – anything that comes with auxiliary windings or a permanent magnet synchronous generator (PMG). Also, keep in mind the type of automatic voltage regulator. There are many kinds of voltage regulators and some are better than others at motor starting, so when purchasing or renting, make sure to see what kind of regulator the generator has equipped.
“A final tip to keep the generator working hard: look at sequencing the load steps if the total load is made up of several pieces of equipment. It is important to not energize all the loads at the same time. Start with the biggest loads first and work your way down to the smallest load. Finally – and this this goes along with guessing the size – always ask a certified electrician or generator expert for help in sizing to ensure the correct generator is selected for a job.
“Sizing power to the application can be difficult, but it is best to stay on the conservative side and not go too much over in size for what you need out on the job site. Generators are built to work hard and the more accurate the sizing is to the application, the greater results you’ll have.”
