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Laser Beam Purging: Displaces air and moisture from beam-guiding tubes to maintain power density and prevent beam divergence.
Optics Protection: Creates an inert blanket over lenses and mirrors, extending service intervals by reducing oxidation and carbonization on critical surfaces.
Leak Testing & Maintenance: Automated purge-and-soak cycles for verifying system integrity after component replacement or preventive maintenance, with logged pressure-decay profiles for quality assurance.
        

Introduction
Neometrix’s Gas Purging System for LASTEC, DRDO is engineered to deliver ultra-high-purity nitrogen in defense-grade laser applications, where even trace oxygen or moisturecan degrade optical components and beam quality. Nitrogen, being inert, dry and oil-free, prevents oxidation of beam-guiding optics and removes particulate contaminants from the laser path, ensuring consistent cutting or machining performance.

System Overview
• Gas Manifold Module : Four × 80 L, 200 bar cylinders arranged for balanced draw-down and automatic change-over, minimizing downtime during cylinder swaps. Dedicated vent line allows safe depressurization and purging of residual gas without
system disassembly.
• Mechanical Control Panel : Multi-stage pressure reduction using ANSI Class 2500 ball valves and precision flow regulators maintains outlet pressure within ±1 bar of setpoint, critical for repeatable purge cycles. High-integrity primary (2 μm) and secondary (0.1 μm) SS316 filters remove particulates and trace moisture before gas enters the laser system.
• Automatic Control Panel : PLC-driven control with HMI touchscreen provides recipe management for purge profiles (ramp-up, dwell, ramp-down), data logging to USB or network, and remote diagnostics. Pressure transmitters (4–20 mA output, 0–200 bar range) and relief valves at 8 bar and 15 bar ensure overpressure protection and alarm generation.

Technical Specifications

  

    

      
Component
      
Details & Rationale
    
  
  

    

      
Ball Valves
      
½″ OD tube ports; ANSI Class 2500; Leakage Class IV ensures bubble-tight isolation, critical during maintenance when purging downstream components.
    
    

      
Filters
      
Primary (2 µm) for bulk particulate removal; Secondary (0.1 µm) for sub-micron purity, preventing nozzle blockage and optics damage in high-power lasers.
    
    

      
Pressure Transmitters
      
316L SS wetted parts; ≤0.5 % BFSL accuracy; UL/CSA/GOST approvals; factory-calibrated with certificate, ensuring traceable measurements over system life.
    
    

      
Relief Valves
      
Spring-loaded SS316, set at two stages (8 bar & 15 bar) to protect both low-pressure downstream and medium-pressure upstream circuits, triggering alarms and safe venting automatically.
    
  


Applications
• Laser Beam Purging : Displaces air and moisture from beam-guiding tubes to maintain power density and prevent beam divergence.
• Optics Protection : Creates an inert blanket over lenses and mirrors, extending service intervals by reducing oxidation and carbonization on critical surfaces.
• Leak Testing & Maintenance : Automated purge-and-soak cycles for verifying system integrity after component replacement or preventive maintenance, with logged pressure-decay profiles for quality assurance.

Key Features
• Extended Run-Time : Four high-capacity cylinders support multi-shift operations without manual intervention, reducing operational interruptions.
• On-Demand Purity : Dual-stage filtration and regulated flow ensure ≥ 99.999 % nitrogen purity at the point of use, matching laser manufacturer requirements.
• Recipe-Driven Automation : Pre-programmed purge sequences can be recalled in seconds, enhancing repeatability across test campaigns or production batches.
• Safety & Compliance : Built-in relief valves, vent lines and certified pressure transmitters ensure compliance with international pressure-equipment directives.

Conclusion
By combining robust mechanical design with advanced PLC-based automation and high-precision components, Neometrix’s Gas Purging System offers a turnkey, defense-qualified solution for laser applications at LASTEC, DRDO. Its modular construction, high-purity output and comprehensive safety features deliver the reliability and data-traceability demanded in critical research and production environments.