Dry nitrogen generator KLN series

high-purityindustrialfor laser cutting

Product overview
Nitrogen used as an assist gas for laser cutting displaces oxygen and clears molten metal from the kerf. Purity, pressure and flow must be selected according to laser power, material, thickness, nozzle and target edge quality.

Industry requirements

• Purity and cut quality: required purity depends on material, thickness and target edge quality.
• Pressure and equipment interface: supply pressure must match the laser equipment interface and specific cutting process.
• Average and peak flow: continuous consumption and instantaneous peaks must be checked separately to size buffering and storage.

Operating principle
Compressed air is filtered and dried before entering the MRN membrane modules. Nitrogen-rich gas is buffered, optionally boosted, and delivered to the laser equipment gas inlet.

System solution
Systems are configured based on laser power, number of machines, material and thickness, nozzle, target purity, working pressure and average and peak consumption.

Process flow
Compressed air → Filtration → Air drying → MRN membrane separation → Buffer / storage → Optional boosting → Point of use

System components

• Compressed air inlet
• Filtration unit
• Air drying unit
• MRN nitrogen membrane modules
• Buffer or storage interface
• System control and gas outlet interface
• Optional booster and laser equipment interface

Main features

• Four KLN models: configured with MRN-4160A or MRN-6160A membrane modules.
• Peak demand handled by buffer storage and optional boosting sized to the actual consumption profile.
• Continuous on-site nitrogen supply reduces reliance on cylinders or liquid nitrogen logistics.

Technical parameters (overview)

• N2 purity: 95–99.9%
• Pressure dew point: with adsorption dryer option down to −70 °C
• Reference laser powers: 6 kW / 12 kW
• Typical cutting materials: carbon steel, galvanised sheet
• System options: buffer storage, boosting and automatic control
• Selection inputs: laser power, material, thickness, nozzle, pressure and peak flow

Models & reference data
Data below are from validated laser cutting nitrogen system references.
Model | Membrane module | Module count | N2 flow (Nm3/h) | Air inlet (Nm3/h) | Max pressure | Reference condition
KLN40-10 | MRN-4160A | 1 | 14.9 | 74.3 | ≤ 16 barg | 13 barg, 55 °C
KLN40-20 | MRN-4160A | 2 | 29.8 | 148.6 | ≤ 16 barg | 13 barg, 55 °C
KLN60-20 | MRN-6160A | 1 | 23 | 114.9 | ≤ 16 barg | 13 barg, 55 °C
KLN60-40 | MRN-6160A | 2 | 46 | 229.8 | ≤ 16 barg | 13 barg, 55 °C

Optional configurations

• Adsorption dryer: specified when lower pressure dew point is required.
• Buffer storage: balances continuous consumption and instantaneous peaks.
• Booster and automatic control: configured according to equipment interface, working pressure and operating mode.

Typical applications

• Laser cutting assist gas
• Continuous production requiring stable pressure and flow
• Multi-shift on-site nitrogen supply
• Integrated buffer storage and optional boosting systems

Data required for selection

• Laser power and number of machines
• Cutting material and thickness
• Nozzle diameter
• Required purity
• Working pressure
• Average and peak gas consumption
• Simultaneity factor and shifts

Characteristics / technical specifications

• N2 purity range: 95%–99.9%
• Minimum pressure dew point (with adsorption dryer): down to −70 °C
• Reference laser power match: 6 kW / 12 kW
• Typical cutting materials: carbon steel, galvanised sheet
• System options: adsorption dryer, buffer storage, booster, automatic control
• Typical maximum working pressure: recommended ≤ 16 barg; reference condition 13 barg, 55 °C