#Product Trends
KaoLu Core Components for PET Blow Molding Machinery — Precision Pressure & Flow Control and a Complete High-Pressure Air-Circuit Solution
PET bottle blow molding proportional control valve
For over 46 years, Kao Lu Enterprise has engineered high-performance modular core components purpose-built for the plastics and rubber industry — with a specialized product line dedicated to PET blow molding machinery. From high-speed rotary blow molding to precise mold temperature control, KaoLu's proportional valves and matched pneumatic components deliver the accuracy, speed, and flow capacity that modern PET production demands.
Why PET Blow Molding Needs KaoLu
PET stretch blow molding depends on precise, repeatable pressure control — the pre-blow and final high-pressure blow (up to 40 bar) must follow an exact pressure curve to produce bottles with uniform wall thickness, zero defects, and minimal material waste. KaoLu's proportional technology makes this possible, while our full range of supporting components lets OEMs build a complete, matched air-circuit from a single trusted source.
Part 1 — Core Proportional Valves
1. High-Flow Proportional Pressure Regulators (QKL-HS Series)
The heart of the blow molding process — delivering the massive, precisely controlled airflow required for high-speed rotary machines.
Model Output Range Flow Rate Repeatability
QKL-HS1 0–2 / 5 / 10 bar 6,000 L/min @30bar ±0.1% F.S.
QKL-HS2 0–20 / 30 / 50 bar 11,000 L/min @30bar ±0.1% F.S.
QKL-HS4 0–70 / 100 bar 70,000 L/min @40bar ±0.5% F.S.
QKL-HS5 0–50 bar 200,000 L/min @40bar ±0.5% F.S.
Class-leading flow capacity up to 200,000 L/min — ideal for high-output rotary lines
Excellent repeatability, linearity & low hysteresis for consistent bottle quality
High-Pressure Air Filter
Port Size: 3/4" ~ 1"
Working Pressure: 0 ~ 40 bar
Delivers clean, dry, high-pressure air to protect downstream valves and ensure stable bottle quality
Cartridge-Type ON/OFF Solenoid Valve
Port Size: 1/2" ~ 1"
Pressure Range: 0 ~ 50 bar
Acting Type: NO / NC (Normally Open / Normally Closed)
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