Laser cutting machine proportional valve pit avoidance guide（Shop·Install·debug·maintain）

1. Brand star ranking（Real reference for export-level laser machines）

★★★★★ top brands：Germany MLS Lanny（Lenny）、FestoFesto、SMC、NorgrenNorgren。High precision、Long life，Special for high-end fiber laser machines。

★★★★☆ First-line brand：AirtacAIRTAC、GoldwareMindman、CKD。High cost performance，Mainstream commercial laser machines。

★★★☆☆ Second-tier brands：Domestic Delixir、Chint et al.，Suitable for ordinary models。

★★☆☆☆ low-end brand：Small factory without standard、Counterfeit goods。Air leakage、pressure drift，Not recommended for export。

2. Must understand：05big、05Small、ITV1050/2050/3050 How to choose？

What is often said in the laser machine industry05big、05Small，is the diameter of approximately5mmproportional valve，Divided into two types according to traffic size：

✅ 05Small（small traffic05）= ITV1050： Traffic is small、Fine adjustment、Low pressure is more stable。Suitable≤1500Wlow power、Thin plate cutting，Equipment with low air consumption。

✅ 05big（large traffic05）= ITV2050： More traffic、More air supply、Cutting without losing pressure。Suitable2000W–6000Wmedium power、Thick plate cutting。

✅ Special for high power = ITV3050 or greater traffic： Designed for≥8000Whigh power、High pressure and high gas consumptionScene design，Ensure stable air pressure during high-pressure cutting、No attenuation。

Simple selection tips：For small computers1050（05Small）、For medium and large machines2050（05big）、8000WUsed above3050，If you choose the wrong one, you will lose the pressure.、Cutting residue、Perforation is slow。

3. Electric proportional valve must be selected，Don’t use ordinary manual pressure regulating valves

Laser cutting machine must be used0–10V / 4–20mA Electric proportional valve，Realize automatic voltage regulation following cutting power。Ordinary valves cannot adjust automatically，Will cause unstable cutting、Many burrs、The cutting mouth is easy to damage。

4. pressure range：Laser machine standards 0.1–1.0MPa，Don’t buy the wrong range

Commonly used fiber laser machines0.1–1.0MPa（10Kilogram）。The measuring range is too small and the air pressure is insufficient.；If the measuring range is too large, the control accuracy will deteriorate.。

1. High-precision air source processing must be installed（filter+voltage regulation+dry）

Compressed air contains water、Oil、Impurities，Will directly damage the valve core and sealing ring。Must use0.01μmPrecision filter，otherwise3–6Will be bad every month。

2. It is strictly prohibited to reverse the intake and outlet connections.

Proportional valves have flow direction markings，If the connection is reversed, the voltage cannot be adjusted.、Air leakage、Damage to the valve body。

3. 0–10V and 4–20mA cannot be mixed

Wiring errors may cause voltage regulation failure、Jumping under pressure、Abnormal cutting。

1. Ventilate first → Power on again，The order cannot be wrong

Wrong sequence will cause valve core impact、pressure overshoot、Internal structural damage。

2. Zero point and span calibration must be done

Failure to calibrate will cause the displayed pressure to be inconsistent with the actual pressure.，All cutting parameters are messed up。

1. Drainage regularly、Replace filter element

suggestion2–3Replace filter element once a month，Drainage every day，Prevent impurities from entering the valve。

2. Air leakage、Abnormal noise、Stop immediately if pressure becomes unstable

Continued use will burn the cutting tip、scrap plate、causing equipment failure。