Coldroom Relief Valve Sizing, 5000 lpm air purge....

[JMOwen]

Gents,

I'm trying to source relief valve(s) to vent up to 5000 lpm of air at -20°C from a 30m x 6m x 5m coldroom with a back pressure not greater than 100 Pa.

Does anyone have any experience of venting on this scale. I've looked into using banks of small (100mm dia) commercial valves designed for smaller rooms but would require at least 25 of them to keep the back pressure within acceptable limits!

Thanks in anticipation..