Kao Lu Assist-Gas Control Components for Laser Cutting Machines — Precision Pressure Regulation for Oxygen, Nitrogen & Inert Gas

laser cutting machine proportional pressure regulator

Laser cutting quality depends on one critical factor: precise, stable control of the assist gas. For over 46 years, Kao Lu Enterprise has engineered high-performance proportional valves and gas-control components purpose-built for laser cutting machines — delivering the fast, accurate assist-gas pressure control that clean, high-speed cutting demands.

100% Made in Taiwan and honored with the 2025 German Design Award, KaoLu components are trusted by laser cutting OEMs worldwide.

Why Assist-Gas Control Matters in Laser Cutting
In fiber and CO₂ laser cutting, the assist gas (oxygen, nitrogen, or air) does the physical work of ejecting molten material from the kerf. The gas pressure must follow a precise, repeatable profile — varying by material, thickness, and cutting stage — to achieve burr-free edges, high cutting speed, and minimal gas consumption. KaoLu's proportional technology makes this level of control possible.

Core Product Lines
1. High-Flow Proportional Pressure Regulators (QKL-HS Series)
The core of assist-gas control — delivering fast, high-flow, precisely regulated gas pressure.

Model QKL-HS1 QKL-HS2
Output Pressure 0–30 bar 0–30 bar
Flow Rate 4,800 L/min @30bar 11,000 L/min @30bar
Port Size PT 1/4" PT 1/2"
Input Signal 0-10V / 4-20mA / RS485 0-10V / 4-20mA / RS485
Monitor Output 1-5V / 0-10V / 4-20mA 1-5V / 0-10V / 4-20mA
Repeatability ±0.1% F.S. ±0.1% F.S.
Linearity ±0.1% F.S. ±0.1% F.S.
Hysteresis ±0.1% F.S. ±0.1% F.S.
Supply pressure: max 1.2× output pressure
Class-leading repeatability, linearity & low hysteresis for consistent cut quality
Digital-ready RS485 (Modbus) integration

2. Dual & Triple Solenoid Valve Assembly
For fast switching between multiple assist gases (e.g. oxygen ↔ nitrogen) in a single compact manifold.

Model KLSV-2/1-10-24-AL KLSV-3/1-10-24-AL
Type Dual Inlets Triple Inlets
Port Size G1/2" G1/2"
Orifice 10 mm 10 mm
Body Material Aluminum Aluminum
Seal Viton Viton
Working Pressure 0–35 bar 0–35 bar
Media Inert Gas or Oxygen Inert Gas or Oxygen
3. High-Pressure Air Filters (KL-020T / KL-030T)
Ultra-fine filtration to protect the cutting head and ensure clean assist gas.

KaoLu offers a fully matched gas supply assembly so OEMs can build the entire assist-gas circuit from a single source:

Air Filter — Port 1/2", working pressure 0–10 bar
Pressure Regulator — Port 3/8", input 10 bar, output 0.5–8.5 bar
Medium Pressure Regulator — Port 1/2", input 35 bar, output 0.5–30 bar
High-Pressure Air Filter — ultra-fine 0.01 μm filtration
Low-Pressure Solenoid Valve — Port 3/8", orifice 4 mm, 0–8 bar
Medium-Pressure Solenoid Valve — Port 3/8", orifice 4 mm, 0–24 bar
Proportional Pressure Regulator — Port 1/4", output 0–7 bar, ±1% accuracy
Push-In Fittings — G1/4"~G1/2", stainless steel, working pressure 0–40 bar

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