SteamTech - SC

SteamTechSC

Press Section SteamShower

Paper and Board Mills making high-quality paper, need a level sheet moisture profile through the entire length of the machine. Today with SteamTech and its unique actuator technology, superior performance in the moisture profile is achievable. The SteamTechSC, a member of the SteamTech Family, is a curved type steam profiler sytem for the press section. Our advanced technology provides a high performance reliable steam actuator with zone spacing down to 50 mm. This, along with our long life actuators, provides superior benefits for today's paper makers.

Advanced Profiler Control Systems

The most important properties of a good steam profiler are its profiling capability and its ability to raise dry content. These two properties will improve the sheet's cross-directional moisture profile and optimize the paper machine's productivity and run-ability. With a SteamTechSC in the press section, managing the moisture profile and drying capacity becomes notably easier.

The compromise between production increases and profiling capability has been eliminated by in-creasing the velocity of the steam jets onto the web in two separate machine direction zones.

SteamTechSC has two zones in the machine direction to make the profiler more efficient. The profiling zone is fully compartmentalized, supplying high velocity steam to each cross direction com-partment via a separate, uniquely designed actuation valve that allows optimum zone definition and precise control. The constant full width zone has higher steam velocity to ensure greater steam condensation on the paper web.

Primary material for SteamTechSC is stainless steel 1.4571 (316 Ti). Special grade stainless steel 1.4539 (904 L) is used against highly corrosive wear at the diffuser plate, edge-heating zones and in control lines. Optional Teflon coating is also available for the diffuser plate and edge heating zones.

Control StationECS/EMA is a SteamTech electronic con¬trol station that manages the control of the individual actuators. Each actuator is controlled with a separate control signal with limit checking. Setpoints are sent from the control station using measurement system data. Control Station is an integrated process station that serves as the central process point for the system. It contains the integrated MD/CD control, the operator visualization package, discreet functions and the intelligence to manage the total profiler control system.

Benefits to the Paper Industry

  • Increased production and flatter moisture profile can be achieved simultaneously.
  • Narrow spacing of the actuator can be defined based on the desired profiling effect.
  • Optional feedback of the actuator position ensures reliable functioning of the SteamTech Profiler.
  • Provides better edge performance for improved reel building.
  • CD moisture 2-sigma improvement of 50 %, with profile correction of 3 %.
  • Dryness increase of 2 - 3 % after press.
  • Production increase of 6 – 10 %.
  • Improved runnability is achieved with a uniform web tension profile.
  • Efficiency increase of the total production line with integrated moisture control of 1-2%

Technical Features

  • Two separate zones in the machine direction.
  • Integrated CD and MD control including discreet functionalities (interlocks, loops).
  • Profiling zone spacing down to 50 mm means high profiling capability.
  • LAN or Serial Link communications for connection to the measurement system.

Technical Specifications

  • Stainless Steel
    Primary 1.4571 (316 Ti)
    1.4539 (904 L) used for high corrosive areas (diffuser plate, edge heaters, control lines
  • Actuator Spacing
    50mm, 75mm, 100mm, 150mm
  • Zone Definition
    Complete welded separate zones with high velocity steam for precise zone definition
  • Retraction
    Custom stainless steel retraction systems for press applications

Options

  • Teflon coating for diffuser plate
  • Removable diffuser plate
  • Steam supply engineering
  • PosiTrak position feedback
  • Turnkey installation