Stock Preparation/Headbox
Headbox Solutions
Hydraulic and pressurized headboxes for precise stock distribution and uniform sheet formation. Our headbox systems deliver consistent basis weight profiles and excellent formation across the full machine width.
Explore Our Headbox Solutions
Precision-engineered hydraulic and pressurized headboxes — delivering uniform fiber distribution for superior paper quality.
Why Choose Parason Headboxes?
With over 50 years of engineering excellence, Parason delivers headbox solutions trusted by 500+ paper mills across 75+ countries.
500+
Mills Served
Worldwide installations
75+
Countries
Global presence
50+
Years Experience
Engineering excellence
24/7
Support
Service & spare parts
Frequently Asked Questions About Headbox Equipment
What is a headbox in a paper machine?+
A headbox delivers a uniform, thin layer of pulp slurry onto the forming wire of a paper machine. It controls jet-to-wire speed ratio, cross-direction basis weight profile, and fiber orientation. The headbox is the most critical component for paper quality.
What is the difference between a hydraulic headbox and a pressurized headbox?+
A Hydraulic Headbox uses pulsation dampening for stable jet delivery at up to 800 m/min for packaging and board grades. A Pressurized Headbox uses air cushion technology with turbulence generators at 400–1200 m/min for writing, printing, and tissue grades.
What are the different types of headboxes used in paper machines?+
Open headbox (low-speed board machines), hydraulic headbox (medium-speed kraft/packaging at up to 800 m/min), and pressurized headbox (high-speed writing, printing, tissue at 400–1200 m/min).
What factors determine headbox selection for a paper machine?+
Machine speed, paper grade, basis weight range, CD profile precision needed, and forming section type (fourdrinier, gap former, crescent former). Higher speeds and premium grades require pressurized headboxes.
What is dilution control in a headbox?+
Dilution control adjusts stock consistency across the headbox width by adding dilution water at multiple points. This allows precise cross-direction control of basis weight without mechanical adjustments — the most advanced method for premium paper grades.
What is a turbulence generator in a headbox?+
Parason's headboxes feature Step-Diffusor Turbulence Generators that create controlled micro-turbulence to break up fiber flocs, ensure uniform distribution, and improve TSI values. Without proper turbulence generation, fibers clump causing formation defects.
Can the same headbox be used for different paper grades?+
A headbox handles different grades within a range. Hydraulic Headbox works for kraft, testliner, fluting, cartonboard, and newsprint. Pressurized Headbox covers writing, printing, tissue, and lightweight packaging at higher speeds.