In the paper & pulp industry, valves need to adapt to complex working conditions such as highly corrosive chemicals, high-temperature steam, high-viscosity slurry and wastewater treatment. The core requirements are corrosion resistance, wear resistance, anti-clogging and precise control.

Applications of valves in the paper industry

I. Pulping section

- Raw material processing: transportation of wood chips and waste paper pulp.

- Cooking system: high temperature alkali solution (NaOH) control.

- Bleaching section: chlorine, chlorine dioxide (ClO₂) and other highly corrosive media.

II. Papermaking machine and drying section

- Pulp ratio: precise control of fiber and additive flow.

- Steam system: high temperature and high pressure steam of drying drum.

- White water circulation: recycled water containing fine fibers.

III. Chemical addition system

- Addition of additives: defoaming agent, starch, dye, etc.

- Acid-base adjustment: corrosive liquids such as sulfuric acid and sodium hydroxide.

IV. Wastewater treatment

- Sludge dehydration: high solid content medium.

- Neutralization tank: pH adjustment.