I need nitrogen gas to purge my biomass and I need to buy a gas regulator for scientific purposes, so what is the acceptable and safe pressure of Nitrogen gas that can be released out from gas regulator to purge a biomass safely?
depends if it is a single or dual stage regulator.
Typical Gas Cylinders are at 2000-2100 psi pressure, so you would need to reduce pressure to your required working pressure using the 2 stages regulator.