Audits & Consulting
Paper machine runnability & efficiency audit
Vacuum system audit
Forming section audit
Press section audit
Drying section audit
Sheet moisture profile survey
Machine hall ventilation audit
Tail threading audit
Paper Machine Solutions
Vacuum Blower Systems - RunEco
Dewatering and Cleaning - RunDry
Runnability and Tail Threading - RunPro
Spare Parts & Maintenance
RunCare Standard for Turbo Blower
RunCare Extended for Turbo Blowers
RunCare Agreement for Turbo Blowers
RunCare Standard for Web Stabilizers
RunCare Extended for Web Stabilizers
RunCare Agreement for Web Stabilizers
About Us
Our Solutions
News
Events
Global Presence
Download Library
Careers
Back to the product list

Web Stabilizers and Pocket Ventilation

Web stabilizers, pocket ventilation and machine geometry modifications eliminate runnability problems efficiently and are often required to ensure fluent paper making process in the press and dryer sections. These low-maintenance solutions have a huge impact on drying and energy costs. 

 

RunPro solution offers runnability, energy saving and ropeless tail threading optimization for the paper board machine from the wet end to the reel.

We are able to supply total drying section rebuilds and modernizations including e.g. web stabilizing, roll relocations, vacuum roll drilling and automatic ropeless tail threading equipment. All the equipment are supported by our professional, flexible and highly experienced team.

We also offer a wide range of analysis services and maintenance for you to keep your machine in optimum condition.                            

Solutions for Press Section

Maximum draw reduction is achieved with:

Benefits:

  • Excellent runnability
  • Easy and safe tail threading
  • Draw reduction between the press and dryer section
  • Reduced number of breaks and defects
  • Increased speed potential
  • More tolerance to process fluctuations
  • Better paper quality
Web Stabilizer to improve runnability and efficiency in a free-standing press

Web Stabilizer to improve runnability and efficiency in a free-standing press

RunPro solution-for-press

Web Stabilizer to support the sheet from the press to the drying section

Solutions for the Single-Felted Section

High‑Vacuum Web Stabilization for Superior Dryer Section Runnability

As paper machine speeds increase, dryer section runnability becomes more sensitive than ever. Sheet flutter, unstable release, wrinkles, and web breaks are often rooted in unmanaged airflow and insufficient web support, especially in the first single‑felted dryer groups.

RunPro Easy4 is Runtech’s latest high‑vacuum web stabilization solution, building on the proven EasyOne concept while adding new levels of simplicity, energy efficiency, and ease of maintenance.

For slower machine speeds, Runtech offers EasyGo web stabilizers. An EasyGo stabilizer generates 200–300 Pa of vacuum and is suitable for machine speeds up to 600–800  m/min.

 

 

Runtech RunPro Web Stabilizer

The negative pressure level required on the dryer fabric side of the opening nip is highly dependent on the production speed. The negative pressure must exceed the pressure on the paper run side, thus making the paper web to follow the fabric instead of the smooth cylinder surface.

High-release nozzle technology of the Easy4 stabilizer enables the required under pressure levels without edge or cross direction nozzles. Thus, there is no further need to blow hot supply air to the stabilizer saving a great deal of energy. In addition to the reduced running costs, the development means lower investment costs for any traditional air system equipment or lay-out demands.

Benefits:

  • Draw reduction typically between 15 - 40 %
  • Possibility to reduce furnish quality
  • Possibility to increase steam pressure without losing runnability
  • Reduced porosity due to lower tension between the press and dryer section
  • Increased sheet elongation
  • Reduction in web breaks typically 20 - 60% compared to standard “low vacuum” stabilizers
  • Easy ropeless tail threading and less widening breaks
  • Significant cost savings in consumable costs due to no need for wear parts

  • New RunPro Turbo Compressor minimizes energy consumption and maintenance

RunPro stabilizer vacuum zones

Solutions for the Double-Felted Section

Web Stabilizer to support the sheet run and to ventilate the cylinder pocket

Reduced unsupported draw by 25 - 50% between the top and bottom dryers enables trouble free runnability and supported ropeless tail threading.

The stabilizer gives better drying capacity due to reduced pocket humidity levels and wider sheet wrap against the drying cylinders.

RunPro solution-for-double-felted

Significant energy saving is guaranteed with optimized pocket ventilation by decreasing the pocket humidity level, correcting the pocket moisture profiles and eliminating the need for over-drying.

The pocket ventilators are installed near the felt rolls blowing dry supply air in to the pockets.

double felted section

Benefits:

  • Improved sheet runnability and reduced break frequency due to supported sheet run
  • Increased drying capacity due to better evaporation efficiency
  • Improved final sheet moisture profile
  • Shorter tail threading time
  • Lower draws enabling usage of less expensive raw material
  • Increased speed potential
  • Maintenance free construction, no wearing parts
  • No fabric contact or mechanical sealing
  • Increased production capacity due to efficient pocket ventilation
  • Better 2-sigma moisture profile
Gráfico otimizado do RunPro

High release stabilizers cut down maintenance costs

A paper machine produces 500,000 tpd of recycled linerboard and corrugated medium. This machine originally built in 2010, runs today with RunPro EasyOne web stabilizers.

Earlier the heavy sealing wear of stabilizers caused a lot of runnability problems to mill. In addition, there was an extremely high consumable cost related to the stabilizers only for the change of the contacting sealing, amounting to the level of 300,000 euros annually. After sealing was changed the runnability remained at a reasonable good level for few weeks or a month but dropped again when there was wear in the sealing plate. After 8 months, the seven first stabilizers were replaced with RunPro EasyOne high release web stabilizers.

When designing RunPro EasyOne, traditional air nozzles and mechanical seals across the machine have been replaced by pivoting high-vacuum, non-contact nozzles. In critical opening nips, the nozzles bend and do not break the fabric if a paper jam occurs. Air is blown with high speed through the high-vacuum nozzles against the fabric’s running direction. Thanks to the combination of the geometry, the construction of the stabilizer and the dynamic forces created by the air flows, a negative pressure is created in the opening nip towards the release point. This negative pressure ensures that the web sticks to the fabric and not to the cylinder surface. This special and patented design is very robust. Possible paper jams and wear part consumption are significantly reduced.

As EasyOne stabilizers have no mechanical contact against the fabric and no consumables, mill was able to cut down the maintenance cost significantly for the stabilizers. The project also resulted in less sheet breaks, break reduction being approx. 50%. The achieved 10% draw reduction means the PM was able to speed up the machine quite a bit too.

An integrated vacuum roll cleaning pipe helps keep the vacuum roll holes clean. Cleaning pipe utilizes pressurized air and can be operated during normal machine run. 

 

Machine data

  • Testliner/fluting, from 70 to 140 gsm
  • Machine speed max 1,500 m/min, trim 7.9 m

Project results:

  • No mechanical contact against fabric
  • No consumables
  • Integrated vacuum roll cleaning pipe
  • Excellent runnability ~50% break reduction
  • 10% draw reduction between the press and dryer section

Web stabilizers enable speed increase

A paper machine produces lightweight medium based on 100% recycled fiber.

This containerboard machine produces linerboard and corrugated medium over 400,00 tons per year. PM was experiencing runnability issues with fairly high amount of sheet breaks per day, resulting in production loss. Runtech supplied RunPro EasyOne stabilizers for the 1st and 2nd dryers, replacing the first seven existing stabilizers. The delivery included an Ingersoll Rand low-pressure compressor.

With this rebuild, a 10% draw reduction between the press and the dryer section has been achieved. The paper machine has been able to cut down the breaks by over 50% and safe running speed up to 1,400 m/min is guaranteed.

Without wearing or contacting parts, there is no damage to the fabric. Construction is fast and easy to clean, and requires no extra shutdowns.

 

Machine data

  • Fluting and testliner, trim 7,500 mm (295”)
  • Up to 1,450 m/min
  • 70-140 gsm

Results after the modification

  • 10% draw reduction between the press and dryer section
  • Sheet breaks from 8-9 to 3-4 / day
  • Safe running speed up to 1,400 m/min guaranteed
  • No wear parts or contacting parts

Related Solutions

runtech-easyone-web-stabilizers.jpg

RunPro: Paper Machine Runnability & Tail Threading Solutions

For web stabilization, machine geometry modifications and ropeless tail threading to ensure operator safety, good runnability, faster machine speeds and increased production

solution-for-press-section.jpg

Ropeless Tail Threading: Superior Solutions | Runtech

Automatic ropeless tail threading solutions are safe, reliable and maintenance free. Technology can be applied from the wet end to the reel.

 

 

paper-machine-runnability-and-efficiency-audit.jpg

Paper Machine Runnability and Efficiency Audit | Runtech

An extensive analysis of the paper making process factors from the wet end to the reel. Request an audit.
runtech-runcare-agreement-web-stabilizers.jpg

RunCare Agreement – Partnership for Runnability

RunCare Agreement offers extended warranty and proactive maintenance for RunPro stabilizers, ensuring maximum efficiency and reliability through a long-term partnership.