F-DGSi Introduce the Combined Nitrogen/Air Generator Serie THYSTER PEGA

News 20 August 2015

At the request of LECO, faced with a problem encountered with a competition equipment, we are asked to develop this combined nitrogen / air generator.
Upon receipt of the specifications of LECO, the system is developed by our IGSM production plant and tested by a final customer “La Lyonnaise des Eaux” located in the Paris suburbs. The test is conclusive, confirmed by a letter from the client attached.


Comments of  LECO customer after having received our unit :

A couple of years ago we had some challenges at a customer’s with their N2 generator from another brand. Essentially, the jets would block some 7-11 hours into a 4 day sequence. The root cause was determined to be the quality of the N2 gas which is not actually sufficient for our purposes if the N2 gas is also used to cool the 2ndary oven. This is simply due to the large flow rates required, which lower the quality of the gas temporarily and can cause the dewpoint to rise past -50C.

At the time we started discussions with F-DGSi in order to develop a solution that would satisfy our local customers.

The net result is that we have been able to provide a much more powerful N2 generator, with independent flows for the N2 gas for cold jets and the air supply for the hot jets. The system also has a built-in timer that allows one to turn it off once a sequence is completed and the latest refinement includes a T-piece on a solenoid that allows the “first batch” of N2 gas to be purged out of the lines, completely bypassing the heat exchange area. This was necessitated by a use-case where the heat exchange area has residual LN2 while the generator is started fresh after a shutdown. The first 45-odd minutes of N2 will not be at the required dewpoint and blockages could potentially occur as a result. The current design therefore allows you to start the N2 generator at a predetermined time prior to your analysis in order to provide the right N2 at the required moment.

Other salient features include much larger PSA chambers allowing for more gas to be prepared at any time, an additional compressor to achieve the higher flow rates and the ability to control the unit remotely through software on a PC, which means the unit can be set away from the Pegasus, lowering the noise envelope.

Alexander Whaley | Director – Separation Science Sales – Africa, Asia, Pacific Rim