Filtration for the Removal of Suspended Solids in Paper Manufacturing Processes

Water is used throughout the entire paper making process. As much as 15,000 gallons of water is required to produce a ton of paper. Water is used in chip washing, pulp washing and in paper making process. It is also used for process cooling and steam generation.

Much of the water used in chip and pulp washing, as well as the water used in the paper making process (head box), is pumped and sprayed through nozzles. Consistent and reliable filtration is a critical aspect of the paper making process. Plugged nozzles and/or restricted flow through the nozzles can cause productivity and quality problems. Spray Nozzle Protection is very important.

ZGF technology removes contaminants effectively and efficiently

Effective and efficient filtration is also important for paper quality. Passage and deposition of large particles can reduce the quality of the finished product.

Effective removal of the smaller and lighter suspended solids is extremely critical. Ideally, you want a positive barrier that will capture and remove particles large and small, and light and heavy. You also want to minimize maintenance and labor which would make bag and cartridge filtration a poor choice. The Zero Gravity Filters permanent media Spring Filter is a coil wound with a variable pitch that allows the filter element to open evenly from top to bottom ensuring that all contaminants are completely cleaned off the filter element with every backwash. The ZGF Spring Filter is manufactured with precision raised nidges. These nidges create an absolute gap that allow the Spring Filter to capture > 99% of spherical particles larger than the micron rating of the filter.

ZGF Spring Filter technology effectively and efficiently captures and removes oversized solids / particles, and is:

  • fully automatic – the self-cleaning process is initiated based on pressure differential, and accomplished in seconds without interrupting flow to the process
  • consistent & reliable
  • non-disposable
  • energy efficient – operates on line pressure, utilizing a minimal amount of electricity and air during backwash
  • environmentally responsible – uses <0.75 % of total water volume for backwash
  • able to remove particles down to 20 micron

ZGF technology is utilized to remove suspended solids from water / process fluids to protect equipment and reduce operating costs

ZGF Spring Filter technology is the ideal choice in the paper making process and has proven success in:

ZGF technology provides value

If true life-cycle costs are considered, typically the payback on ZGF Spring Filter technology can be realized in less than 1 year. This is based on ZGF Spring Filter technology:

  • having no moving parts,
  • operating costs of less than $100 per year, and
  • a 5-year guarantee on the Spring Filter element.

Click on ZGF Phoenix vs Bag Filter to see a how a ZGF customer was able realize a simple payback in 8 months.

ZGF technology can provide significant value in several operations and applications. Click on Success Stories to jump to the Success Stories / Case Studies page to learn how ZGF technology provides value. 

To learn how a paper manufacturer thought out of the box and utilized ZGF Spring Filter technology to reduce total operating costs while being more environmentally responsible, click on the case study Paper Manufacturer Save Energy and Money by Reusing Vacuum Pump Seal Water. and Paper Manufacturer Prevents Nozzle Plugging – Improves Process Reliability & Reduces Maintenance Burden.

To get a better understanding on where ZGF Spring Filter technology can provide value in your operations, download the Process Diagram, Pulp and Paper and Process Diagram, Industrial Process Water (pump seals) and Process Diagram, HVAC and Cooling Water.


If you want to learn more about ZGF EZ Clean technology, then click on one of the links to download the:

View the Spring Filter video to see how all the contaminants are removed from the Spring Filter during backwash when the filter element opens and shimmers.

Simplicity, consistency, reliability and the lowest cost of ownership make ZGF Spring Filter technology the best solution and value in several pulp and paper operations!  

ZGF is your preferred partner.

 Filtration should not be a burden.

 Filtration should be a tool that improves quality and reduces cost.

Let us help you meet your objectives and make your job easier!


 ZGF has the experience and dedication to customer satisfaction that you are looking for. Contact us or request a quote today.