Nitrogen Generators

Blanketing, purging and fire prevention duties commonly run at 95 to 99 percent, LCMS instruments typically want around 99.5 percent, and GC carrier or demanding process work pushes to 99.999 percent. Higher purity costs disproportionately more air and energy, so specify what the application needs rather than the best available. Check your instrument manuals, since over specifying purity is the most common and expensive sizing error.

Expect roughly two to four times the nitrogen output in feed air at moderate purity, rising steeply at high purity, so a generator is really a compressed air project in disguise. Confirm your existing compressor has genuine spare capacity or budget for a dedicated one. Feed air must also be dry and oil free to protect membranes and sieve material, which means dryers and filtration belong in the plan.

Membrane systems need little beyond feed air filter changes, though membranes lose capacity if oil or water reaches them. PSA systems add valve service and, over many years, carbon molecular sieve replacement, with oxygen analyzer calibration on monitored systems. When viewing used generators, ask specifically about feed air quality history, since poisoned sieve or membranes is the fault that matters.

Yes, and you should verify it rather than accept it, since sieve and membrane condition determine achievable purity regardless of age. Ask the seller to run the system and demonstrate purity on a calibrated oxygen analyzer at your required flow. A generator holding specification under witnessed test is a sound purchase, and one that cannot is a source of parts.

Frequently, because the cylinder spend the generator eliminates is a known monthly figure that repayments can sit below from the first month. Where a listing on Machinery Masters qualifies, finance is arranged through the platform while you agree price and delivery directly with the seller. Many buyers reach positive cash flow on the switch immediately by structuring it this way.