Cookies help us deliver our services. By using this site, you agree to the use of cookies. We do not store any personal details. Learn more.

Media / Application stories / Oil-free compressors provide product purity and energy savings for bottling plant

Oil-free compressors provide product purity and energy savings for bottling plant


Antwerp, August 9, 2012. Princes Gate Spring Water has achieved significant energy savings and production improvements at its Wales-based bottling plant by replacing its oil-lubricated compressor installation with Atlas Copco oil-free equipment to provide a guaranteed supply of high quality air and ensure the purity of its natural water products.

ZT37 tooth air compressor
The company’s plant in Narberth, Pembrokeshire, bottles mineral-rich spring water filtered naturally through the local landscape. The production operations need a constant 108 l/s supply of high quality compressed air at 7bar to meet the demands of the process line’s low-pressure air users, such as air cylinders, manifolds, filling equipment and inking machines −  all of which contribute to an annual output of 55 million bottles of spring water from the company’s on-site source.
Princes Gate supplies bottled water to large wholesale operations and as own-label brands to a number of large supermarket chains. All of these customers require suppliers to comply with the minimum purity standards of the Code of Practice for Food Grade Compressed Air, jointly developed by the British Retail Consortium and the British Compressed Air Society. The code places the burden of responsibility for the provision of uncontaminated air on the end product manufacturer to ensure that its process air is free from dirt, water and oil contaminants.
The company’s decision to install two Atlas Copco oil-free compressors, the ZT37 VSD and the ZT18, together with new AIRnet pipework, was influenced by the need to ensure optimum air quality and product purity. Atlas Copco’s process air complies with the standard of air purity, ISO 8573-1(2001), and also embraces the Class 0 industry standard which measures all three forms of oil contamination: aerosol, vapour and liquid.

Prince Gate’s compressor upgrade was influenced not only by the need for guaranteed 100% oil-free air,  but also for the production environment benefits of lower operational noise levels and the elimination of the time and costs involved in oil condensate disposal. What’s more, the integrated frequency converter feature of the Atlas Copco VSD (variable speed drive) compressors varies the speed of the drive motor to exactly match the changes in compressed air demand, thus using the minimum amount of energy and saving Princes Gate up to 35% in energy consumption costs.
The net effect of these production line improvements has now enabled Princes Gate’s management team to put plans in place for increasing the company’s annual output to 70 million bottles and to undertake a major expansion of retail sales during 2012.
Commenting on the success and efficiency of the compressor upgrade operation, Endaf Edwards, Princes Gate’s Operations Director said: “The Atlas Copco equipment is proving to be very efficient. It produces the 100% oil-free, high quality, dry air we need and is extremely reliable. In our view, the installation of the compressor plant was carried out very professionally and we have no hesitation in recommending Atlas Copco’s equipment to other companies.”

Editor’s Notes:  
Please download picture here:

For further information please contact

About Princes Gate Spring Water

Princes Gate Spring Water was started on an organic farm almost 22 years ago by two brothers, David and Glyn Jones, who still maintain directorship of the business and employ over 50 people local in the Pembrokeshire region. The purpose-designed bottling hall was built on the farm site and, from the start, the company has been continually investing in plant and equipment for improved performance with minimal environmental impact. The farm is still a fully operational organic dairy farm, and bio-diversification has gained the company several accreditations as it manages the land for the betterment of the local wildlife and plant species. 

Atlas Copco is an industrial group with world-leading positions in compressors, expanders and air treatment systems, construction and mining equipment, power tools and assembly systems. With innovative products and services, Atlas Copco delivers solutions for sustainable productivity. The company was founded in 1873, is based in Stockholm, Sweden, and has a global reach spanning more than 170 countries. In 2011, Atlas Copco had 37 500 employees and revenues of BSEK 81 (BEUR 9). Learn more at

Atlas Copco’s Compressor Technique business area provides industrial compressors, gas and process compressors and expanders, air and gas treatment equipment and air management systems. It has a global service network and offers specialty rental services. Compressor Technique 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.