Knife Gate Valves Browse All 
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Unidirectional
Bidirectional
Urethane Lined
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Push-Through, Slurry Valves
Guided Shear Gate
Zero Pocket
Pulp and Paper Industry
This industry sector involves the transformation of raw materials, primarily wood, into pulp, which is then processed to create various paper products including packaging materials, hygiene products, as well as printing and writing paper. The processes used to achieve this are demanding and valve applications may involve corrosion, erosion, or abrasion, possibly in conjunction with each other. The handling of liquids, dry solids, chemicals, slurries, and fibrous materials all exist in pulp and paper mills and the selection of valve type, design, and materials are all critical considerations for these applications. You can trust Elite Valve’s experience in providing engineered solutions that improve process reliability and productivity.
Pulping Process
The Kraft pulping process is a dominant method in the paper-making industry involving the conversion of wood into wood pulp using a mixture of sodium hydroxide and sodium sulfide, known as white liquor, to break down the lignin that binds cellulose fibers. The wood chips are cooked in a digester, with the white liquor, resulting in a pulp that is separated from the lignin and other components, forming black liquor. The pulp is then washed and screened to remove any remaining impurities before being bleached and processed into paper products.
E5600 High Performance
Knife Gate Valve
Highly customizable, high-performance Class 150/300 valve for liquor handling, steam, and aggressive applications in the digestor, pulping, recovery boiler, and re-causticizing processes.
OP5600 High Performance
O-Port Knife Gate Valve
Through conduit design prevents blockage in high density applications including digestors, high consistency pulp handling, and stock preparation.
E5400 General Purpose
Knife Gate Valve
Unidirectional valve with metal seat option is suited for stock preparation and moderate consistency pulp handling applications.
HP6
Ball Valve
Class 600 ball valve with chrome carbide coated metal seats and ball for high temperature, high pressure, steam handling, and abrasive applications.
Bleaching Process
The bleaching process is essential for producing white or lighter-colored paper by removing residual lignin from pulp and involves treating the pulp with various chemicals such as chlorine dioxide, oxygen, ozone, and hydrogen peroxide. This process aims to increase the pulp’s brightness and purity while minimizing damage to the cellulose fibers. Bleached pulp is then washed thoroughly to remove any remaining chemicals before being processed into high-quality paper products.
HP6 | Soft Seat High Performance Class 600
Ball Valve
Full port, low fugitive emissions, fire safe ball valve with various seat options for demanding applications in process industries.
SB2900 PTFE Lined
Butterfly Valve
Fully PTFE lined butterfly valve with welded shaft and disc to resist crevice corrosion in chlorine handling applications.
Recycling Process
Recycling involves the collection of used paper products and converting them back into usable pulp by sorting and shredding the recycled paper, and then mixing it with water to create a slurry. Adhesives, and other contaminants are then removed from the slurry using flotation, washing, or chemical treatment processes. The cleaned pulp is then refined, blended with new pulp if necessary, and formed into sheets through pressing and drying.
E5700 Aggressive Process
Knife Gate Valve
Class 150 valve with hardened seat and gate for high-wear applications including recycling valves, scavengers, trash valves, or junk traps.
E5400 General Purpose
Knife Gate Valve
Unidirectional valve with metal seat option is suited for stock preparation and moderate consistency pulp handling applications.