Variable speed drive screw vacuum pumps now available for flows up to 5004 m3/h

Central vacuum supply using 50% less energy

Atlas Copco is launching its new variable speed drive vacuum pumps GHS 3800–5400 VSD+ at ComVac. These energy efficient units are suitable for central vacuum supply systems. With 50% energy savings and a low-maintenance design, these pumps have a very short payback period.

This year, Atlas Copco is adding three new models to its highly efficient GHS VSD+ series of variable speed drive vacuum pumps. To date, the maximum flow rate has been 1810 m3/h. Screw vacuum pumps are suitable for applications with high vacuum requirements, for example in the glass industry, on packaging lines, in can production or in drying processes. There are especially useful for upgrading from several decentralized pumps to a central vacuum supply system. With the GHS VSD+, users can significantly boost their productivity; Atlas Copco reports that energy savings of up to 50% are possible in comparison with conventional rotary vane vacuum pumps. “The payback period for a converted system is extremely short,” says Christoph Angenendt, Communications Manager Industrial Vacuum with Atlas Copco.

“The new units deliver higher volume flows per hour and per kilowatt power input than any other vacuum pump of comparable capacity,” adds Angenendt. “And they are among the most efficient vacuum pumps on the market.” The design of these units is based on the tried and tested plug-and-play principles of Atlas Copco’s well-known compressors.

Vacuum precisely tailored to meet demand

The GHS 3800–5400 VSD+ vacuum pumps are high-performance environmentally compatible units. In a central vacuum system, the new pumps can precisely tailor vacuum production to meet customers’ demand. The pumps, which are equipped with smart Elektronikon controllers and variable speed drive systems (VSD+), are extremely economical in operation. The pressure set point control function also ensures that the pumps deliver the lowest possible vacuum flow with which the required vacuum can be maintained. This means that no energy is wasted and that life cycle operating expenses are significantly reduced.

Low maintenance requirements also help keep life-cycle costs low. There are no rotary vanes that need to be replaced and the screw element does not require maintenance for many years. In addition, intake filters and oil separators can be replaced without dismantling any piping. Maintenance cycles in general are very long and operators can obtain information on all the maintenance work required in good time using a network with Smartlink software.

Small footprint, easy installation

Atlas Copco supplies the vacuum pump as a plug-and-play system in a single housing. Installation is very quick and simple, saving time and space. The units have a very small footprint. Even the largest variant of the GHS VSD+ series (3800-5400) is less than 2 m x 3 m. These models are also considerably quieter than comparable pumps and fit very well into environmental and energy management systems in accordance with ISO 50001 and 14001. Energy recovery components can be integrated into the system, allowing users to recover a large amount of the heat which is unavoidably generated by compression without sacrificing pump performance. Atlas Copco reports recoverable energy levels of about 75%.

The GHS-VSD+ pumps have been developed especially for the working pressures most commonly required in industrial vacuum applications. They offer significantly higher performance than other oil-sealed and dry vane vacuum pumps. Energy recovery keeps heat release in the vicinity of the units to a minimum, which means that air conditioning systems are not needed for nearby work stations.

Electronically monitored cooling system

The cooling system is equipped with an electronic thermostatic valve that accurately controls the oil temperature. This means that the oil retains its optimum consistency, as any entrainment of water to the oil cycle by condensation is avoided. The cooling system also operates with a speed-controlled fan to minimize energy requirements. The vacuum pumps in the GHS 3800–5400 VSD+ series are available with water or air cooling.

Due to the extremely high oil retention capacity of the GHS VSD+, environmental impact at all operating pressures is significantly lower than with other vacuum pumps. The range, which has recently been extended upwards, now includes for the first time a new, patented oil separator which limits the residual oil level to a maximum of 3 mg/m³. “This means that the exhaust air is significantly more environmentally compatible than with other oil-injected pumps of this size available on the market,” Angenendt reports. In addition, the Atlas Copco technology allows shorter cycle times because the pump reacts very quickly to changed process conditions in the pressure range relevant for the user.

The screw element has a sturdy design and a considerably longer service life than the elements typically used in screw compressors or rotary vane pumps. The special inlet control valve, which is operated in close liaison with the variable speed drive, allows energy consumption to be minimized.

All the pumps are equipped with Elektronikon controllers and the Smartlink remote monitoring system. The tried and tested Elektronikon controller is easy to understand and also ensures energy savings. It can be integrated into a process control system and can also control other manufacturer’s vacuum pumps.

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Atlas Copco is a world-leading provider of sustainable productivity solutions. The Group serves customers with innovative compressors, vacuum solutions and air treatment systems, construction and mining equipment, power tools and assembly systems. Atlas Copco develops products and service focused on productivity, energy efficiency, safety and ergonomics. Founded in 1873, the company is based in Stockholm, Sweden, and has a global reach spanning more than 180 countries. In 2016, Atlas Copco had revenues of BSEK 101 (BEUR 11) and close to 45,000 employees.

Atlas Copco’s Compressor Technique business area provides industrial compressors, vacuum solutions, gas and process compressors and expanders, air and gas treatment equipment and air management systems. The business area has a global service network and innovates for sustainable productivity in the manufacturing, oil and gas, and process industries. Principal product development and manufacturing units are located in Belgium, Germany, the United States, China and India.