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Web Stabilizers and Pocket Ventilation

GDI Contents Runnability Tail threading360x360pxRunPro solution-for-pressRunPro optimized-chartRunPro solution-for-double-felted
GDI Contents Runnability Tail threading360x360px
RunPro solution-for-press
RunPro optimized-chart
RunPro solution-for-double-felted

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. 

 

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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 AirCurtain for center roll sheet release.

Benefits:

  • Excellent runnability
  • No mechanical contact between the stabilizer and the press felt / drying fabric
  • Easy and safe tail threading
  • Draw reduction between the press and dryer section
  • Reduced number of breaks and defects
  • Better paper quality
  • Increased speed potential
  • More tolerance to process fluctuations
  • Low maintenance construction due to no wearing parts
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-section

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

Solutions for the Single-Felted Section

EasyOne concept - Optimized web release with a special high vacuum area at the critical sheet release point between the upper cylinder and the vacuum roll.

The increased compressor energy requirement for the high release nozzles will be compensated by the cost savings: The reduced number of web breaks and the reduced time required for cleaning work and tail threading following the web break.

single felted section

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 EasyOne 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

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

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Contact UsRequest an AuditRequest Service, Parts or Support