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News ReleaseDiodes Incorporated Eliminates Down Time and Improves Sustainability Credentials, Thanks to Air Products’ Flexible PRISM® Nitrogen Gas Generator Solution

June 02, 2015 London, UK

An Oldham-based manufacturer has eliminated operational down time, cut the risk of contamination, reduced traffic movements to its site and reduced its noise impact on nearby residents, all thanks to swapping its daily deliveries of nitrogen for an on-site PRISM® nitrogen gas generator.

Global manufacturer of specialist semiconductor products, Diodes Incorporated, turned to market leader Air Products to provide a new solution that would enable the team to produce a constant flow of nitrogen on-site, rather than import a limited volume via tanker each day.

Air Products’ generated gases experts recognised the requirement for a flexible solution that would not only provide the Diodes team with a constant high purity supply of nitrogen, access to world-class technology and an efficient maintenance service, but also provide a more cost-effective and environmentally friendly service that would reduce the sound impact on an adjacent residential estate.

Colin Stott, Facilities Projects Engineer at Diodes Incorporated, commented: “Prior to working with Air Products, 20 tonnes of liquid nitrogen was being transferred onto site each day by a large tanker, rather than being produced on-site. We recognised this wasn’t an environmentally friendly way to operate, which was at risk of being delayed by traffic and subsequently could potentially affect production. An additional challenge was the contamination risk as the liquid nitrogen was transferred from one tanker into another container each day. Noise was another issue for us, as a residential estate is located just 30 metres away from our Oldham site, which we were keen to address.”

Air Products identified that the original request for quotation from Diodes had stipulated a future demand of 780 Nm3/hr Nitrogen, but following a discussion with the team, it became apparent that their current day requirements would be lower at 650 Nm3/hr. The Air Products team recommended a flexible on-site equipment solution that could provide this range of flow rate requirements, as well as a reliable and safe service.

Jonathan Taylor, Sales Manager at Air Products, commented: “Our recommendation was to supply a state-of-the-art PRISM® cryogenic nitrogen plant, which would be installed on-site and provide the safety, reliability and efficiency that Diodes needed to produce high quality nitrogen. We installed a single, three stage compressor that would reduce any potential interruptions that could be experienced when using three separate compressors, enabling Diodes to continue increasing its production capacity.

“We had to overcome a number of challenges, such as working within a limited plot of land, which meant we had to re-engineer our standard layout. In addition we had to design a bespoke electrical panel to fit the constraints of the existing power supply which avoided Diodes making costly changes to its power distribution system.

“This process would take several months to complete, but it was essential that we had the capability to supply nitrogen from day one to ensure continuity of supply. To meet this requirement, we provided a new liquid nitrogen support system to increase their existing back up capacity; this in turn reduced the frequency of tanker movements.

“We also commissioned noise studies, procured low noise abatement products to insulate our equipment and created models of the land to help identify how the project would work. This thorough planning proved to be a success, as it enabled us to continue business as usual – with no complaints from the neighbours.”

Air Products also supplies the Diodes team with a 24/7 monitoring and maintenance service, which can quickly rectify any issues that could affect production.

Colin Stott added: “Air Products provided us with the best technical solution to address our requirements; a flexible, high quality PRISM® gas generator plant that could be tailored with minimal investment and is robust enough to handle the volumes of nitrogen that we use on a daily basis. Today, the on-site system is producing 23 tonnes of nitrogen per day (600-650 Nm3/hr) and the generator is backed up by the liquid nitrogen storage on-site to provide a continuous uninterupted supply. This gives us the capability and confidence to continue meeting customer demand.

“Focusing on the cost of our gas was key in order to help our management and finance teams with forecasting and to ensure the stability of supply. We are now able to capture what our nitrogen outputs are for the next 10-15 years. We’re very pleased with the support that Air Products has provided to our Oldham site, which is generating nitrogen that’s in line with our cost projections going forward.”

Diodes Incorporated (Nasdaq: DIOD), a Standard and Poor's SmallCap 600 and Russell 3000 Index company, is a leading global manufacturer and supplier of 2 high-quality application specific standard products within the broad discrete, logic and analog semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets.

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About Air Products
Air Products (NYSE:APD) is a leading industrial gases company. For nearly 75 years, the company has provided atmospheric, process and specialty gases, and related equipment to manufacturing markets including metals, food and beverage, refining and petrochemical, and natural gas liquefaction. Air Products’ materials technologies segment serves the semiconductor, polyurethanes, cleaning and coatings, and adhesives industries. Over 20,000 employees in 50 countries are working to make Air Products the world’s safest and best performing industrial gases company, providing sustainable offerings and excellent service to all customers. In fiscal 2014, Air Products had sales of $10.4 billion and was ranked number 276 on the Fortune 500 annual list of public companies. For more information, visit

NOTE: This release may contain forward-looking statements within the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are based on management’s reasonable expectations and assumptions as of the date of this release regarding important risk factors. Actual performance and financial results may differ materially from projections and estimates expressed in the forward-looking statements because of many factors not anticipated by management, including risk factors described in the Company’s Form 10K for its fiscal year ended September 30, 2014. 

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