Thanks for all your input.
We have investigated 2 options other than the current system. Currently supplying one SSM with N2 via "Canister" system 230L Cryogenic... The options are to increase the reservoir to a fixed 2000L Cryogenic bulk tank system or an In House N2 generation to supply 2 SSM machines.
The GEN system is configured to provide over 70CFH @ 99.9998, 10PPM purity to both SSM. A couple of systems presented require similar air volume and pressure of 100 to 110 PSIG @ 12.7 to 15 SCFM. Proper compressed air filtering has been included in this summary. As well the question of compressed air supply /sharing the facility compressor should not be an issue. We will have flow meter and pressure gauges to monitor each end of the system with air supply and N2 delivery.
There was a question of equipment reliability we wanted to understand to support the decision.
Let me point out that the Bulk Supply is relatively less expensive than the current configuration at about 1/2 the cost of gas and less handling. However the monthly lease of the tank is significant. The advantage of this system is reliable purity and abundant supply.
N2 generation requires a significant investment in the N2 equipment itself, plumbing/re-plumbing of gas lines and maintenance of, plus the added burden on the air compressor systems and those maintenance costs, and energy.
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