Industrial Water Filtration for Pulp & Paper

As a leading supplier of industrial water filtration systems for pulp and paper, Compositech's pulp and paper filtration mill customers regularly use vacuum filtration equipment for fiber recovery and for sludge dewatering. Paper mills use disc filters as savealls to recover fiber lost in the paper-making process.

Additionally, disc filters are used as stock thickeners in both pulp and paper mills. A lot of industrial water filtration equipment for pulp and paper also use gravity tables and belt press filters for sludge dewatering and AES strainers in conjunction with savealls and deckers for polishing shower white water and for removing felt hairs from recycled press water. Compositech's pulp and paper filtration equipment lineup — including rotary vacuum disc filters, gravity belt thickeners, and belt press filters — is engineered to keep mills running efficiently, minimize fiber loss, and reduce unplanned downtime.

Compositech's rotary vacuum disc filters are used for filtration in many processing industries including pulp and paper industrial water filters. Disc filters are versatile and provide reliable, continuous liquid-solid separation. However, they do require major operator attention and a high volume of synthetic wire sector cover replacement due to the high tonnage of abrasive materials being filtered.

This is why Compositech pairs every disc filter with a full inventory of OEM-quality replacement components designed to reduce maintenance downtime.

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Replacement Parts for Pulp & Paper Filtration

In addition to the vacuum disc filters we manufacture, Compositech supplies improved replacement parts for other disc filter brands. Compositech manufactures a stainless steel centershaft successfully used by our pulp and paper filtration equipment clients to replace the cast iron centershaft supplied with most disc filters. The proprietary design of our centershaft features custom-made radial rod sockets and tubing for the drive-end trunnions. All filtrate tubes and trunnions are 100% seal welded before machining to ensure a smooth, leak-free finish. All filtrate tubes are individually removable from the centershaft allowing for easy repair and replacement without requiring complete disassembly of the filter. We design our centershafts to meet or exceed the quality of the original equipment manufacturer. Most recently, we built a replacement centershaft for an Eimco® disc filter. This Compositech designed and manufactured centershaft, measures 33 inches in diameter with a length of 28 feet, 9 inches.

How Filtration Equipment Supports the Pulp & Paper Process

Compositech's vacuum filtration equipment is built to support pulp and paper mills at every stage of production:

• Fiber Recovery (Savealls): Disc filters recover fiber that would otherwise be lost during the paper-making process, improving yield and reducing raw material costs.
• Stock Thickening: Disc filters also function as stock thickeners, concentrating pulp stock before it moves further down the production line.
• Sludge Dewatering: Gravity tables and belt press filters dewater sludge generated during pulp and paper processing, reducing disposal volume and cost.
• White Water Polishing: AES strainers work alongside savealls and deckers to polish shower white water and remove felt hairs from recycled press water, protecting downstream equipment and improving water reuse.

Pulp & Paper Industrial Water Filtration Parts Inventory

We have a large inventory of pulp and paper filtration and industrial water filtration system parts including:

• wear plates
• valves
• bridging
• flex connectors
• sectors
• clamps and rods
• sector covers
• tie rods
• retainer rings
• bearings and bearing liners
• screw conveyor bearing housings
• stub shafts
• air clutches
• stainless steel hood doors
• knock off shower headers
• oscillating shower headers
• screw conveyor scrapers
• agitators
• drive gears and worms
• motors and reducers

We are also able to custom design parts for pulp and paper industrial water filters to your specifications.

Gravity Table & Belt Press Filter Designs

Compositech produces our own gravity table and belt press filter designs with several models available. We also manufacture replacement parts for other brands of gravity tables and belt press filters. The unique inflow arrangement of the gravity table in combination with a belt press maximizes the drainage efficiency of the dewatering process in terms of flow rate, polymer consumption, and solid content in the cake.
Compositech stocks bearing assemblies, seals, gaskets, rollers, doctor blades, steering valves, plows, feed boxes, and belts for all makes of gravity table and belt press filter.

Why Mills Choose Compositech for Pulp & Paper Filtration

For more than 20 years, Compositech has supplied industrial filtration equipment to mills and municipalities across the U.S. and globally. Every replacement part is manufactured and warranted by Compositech to meet or exceed OEM specifications, and our team offers on-site maintenance and inspection as well as emergency repair and rebuild services to minimize mill downtime.

Find an Industrial Water Filtration Solution for Your Mill Today

As a manufacturer of industrial water filtration equipment for pulp & paper, Compositech manufactures our own design of disc filter, gravity table, and belt press filter. In addition to our equipment designs, we fabricate replacement parts for other brands of disc filters, gravity tables, and belt press filters, and we make spare parts for AES strainers. Our technical staff has a broad background with years of experience working directly for disc filter manufacturers. We are available to provide a range of services from simple sector recovering to complete filter rebuilds, industrial water filtration systems, and emergency repairs for all models of vacuum filters.

We stock Compositech designed and manufactured replacement parts for AES, Andritz, Ashbrook, Beloit Jones™, Celleco™, Dorr-Oliver®, Eimco®, GL&V®, IMPCO™, Komline-Sanderson®, Parkson, SernaTech/Sernagiotto and most other brands of vacuum filters. Our replacement parts meet or exceed the quality and material of vacuum disc filter OEM components.

Contact us today and allow Compositech to help you or answer any questions concerning your pulp & paper filtration and industrial water filtration system. Or for more information on our equipment for pulp & paper!

Frequently Asked Questions About Water Filtration for Pulp and Paper Mills

What type of filtration equipment is used in pulp and paper mills?

Pulp and paper mills commonly use rotary vacuum disc filters as savealls to recover fiber, plus gravity tables and belt press filters for sludge dewatering. AES strainers polish shower white water and remove felt hairs from recycled press water, while disc filters also serve as stock thickeners throughout the papermaking process.

How do disc filters recover fiber in paper mills?

Disc filters act as savealls, capturing fiber that would otherwise be lost in process water during papermaking. Vacuum pressure draws liquid through a filter media on rotating discs, leaving recovered fiber on the surface. This improves raw material yield and reduces the fiber load sent to wastewater treatment.

What causes wear on pulp and paper disc filters?

Disc filters process high tonnage of abrasive pulp and paper slurry, causing significant wear on wire sector covers, wear plates, and other components. This requires frequent replacement and close operator attention. Using OEM-quality replacement parts, like Compositech's stainless steel centershafts, helps extend equipment life.

What is a gravity belt thickener used for in paper mills?

A gravity belt thickener concentrates dilute sludge by allowing water to drain through a moving belt via gravity, before further dewatering. In pulp and paper mills, it's commonly used ahead of belt press filters to reduce sludge volume before disposal, cutting handling and disposal costs.

Does Compositech offer replacement parts for other disc filter brands?

Yes. Compositech manufactures OEM-quality replacement parts — including centershafts, wear plates, valves, and flex connectors — compatible with other disc filter brands used in pulp and paper mills. Compositech is not affiliated with or an authorized parts supplier for GL&V®, CELLECO™, Beloit Jones™, or IMPCO™.

_{Compositech is not an authorized replacement parts or services supplier for GL&V®, GL&V and design®, CELLECO™, Beloit Jones™ and/or IMPCO™ brand process equipment or parts therefor nor is it in any way associated with GL&V USA Inc. or its affiliated entities.}

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