The Industry

Built for the Mill's Toughest Process Streams

Pulp & paper mills run some of the most aggressive process chemistry in industry — bleach plant acids, black liquor recovery, white liquor causticizing, and abrasive stock at consistencies from 0.5% to 35%. Three challenges in one: corrosion resistance, abrasion resistance, and the operational reliability to run for years without unplanned shutdowns.

For three decades, Miller Valve & Controls has supplied pulp & paper customers with valves engineered for these specific stresses. From kraft to mechanical pulping, recycled fiber to tissue, our partner manufacturers build the materials of construction and design tolerances that hold up where others fail.

We work with mill engineers and reliability teams to spec the right valve for each unit operation — backed by the manufacturer relationships and field experience that come from 30+ years in mill applications.

Common Applications

Where Our Valves Earn Their Keep

Every mill unit operation has its own demands. Here's how we approach the most common — and the valve types we recommend for each.

Stock Lines

Knife gate valves engineered for stock consistency from low-density rejects through high-density pulp. Shear-edge designs prevent fiber wrap and packing.

Black Liquor

High-temperature ball valves and knife gates for black liquor evaporator and recovery service. Corrosion-resistant alloys for the long campaigns.

White & Green Liquor

Caustic-resistant valves for white liquor and green liquor service. Stainless and high-nickel alloy bodies, wear-resistant trims for long service life.

Bleach Plant

Acid-resistant valves for ClO₂, sodium hypochlorite, hydrogen peroxide, and ozone delignification. Specialty alloys including titanium for the toughest reagents.

Pulp Slurries

Urethane-lined and metal-seated valves for thick stock, screening, and reject handling. Built to handle the abuse of fiber-rich slurries.

Recovery Boilers

Severe-service valves for smelt dissolving tank, green liquor, and boiler aux service. Designed for thermal cycling and corrosion.

Steam & Condensate

Steam isolation and condensate return valves for digesters, evaporators, and dryer drives. Tight shutoff for energy efficiency.

Process Water

Mill water, fresh water, and white water service. Reliable isolation and control for the auxiliary streams that keep production moving.

Vendor Partners

Trusted Manufacturers for Pulp & Paper

Our pulp & paper valve solutions draw from a curated set of manufacturer partnerships — chosen for their materials science, mill-duty engineering, and field-proven reliability.