Step 2: Select nitrogen purity by industry
Industry of Application | Required Purity
Food packaging, beverages, anticorrosion, fire protection, purging | 95%～99.0%
Chemical replacement, warehouse moisture-proofing, pipeline purging, hardware rust prevention | 99.0%～99.9%
Heat treatment, powder metallurgy, die casting, injection molding, rubber, cables | 99.9%
Laser cutting, welding protection, pharmaceuticals, lithium batteries, glass | 99.99%
Electronic semiconductors, laboratories, special materials, precision welding | 99.999%
Principle: Sufficient is enough. With each upgrade in purity grade, equipment costs and power consumption rise significantly.
Step 3: Determine Working Pressure
Conventional Low-Pressure Nitrogen Supply
Standard outlet pressure of nitrogen generator: 0.6～0.8 MPa
Application: Packaging, purging, dust removal, conveying and general protection
Medium and High-Pressure Nitrogen Supply
Additional nitrogen booster required
1.0～1.6MPa: Chemical industry and container pressure testing
2.0～3.0MPa: Rubber vulcanization and high-pressure sealing
Above 3.0MPa: Military industry and special tests
