Brochure
Dryer Steam and Condensate Return
After water is removed from the sheet via vacuum and the press section of the paper machine, heat is applied to evaporate the
remaining water to the desired paper dryness. Steam is sent to large diameter steam-heated cylinders to provide the necessary
heat, and the resulting condensate must be returned to the mill’s boiler feedwater system. Correct steam, and thereby heat, is
important to ensure end product is at the correct dryness and on-specification.
n
CONTROL RANGE Expanded buttery control range of 15-70 degrees of operation.
n ZERO LOST MOTION Splined driveshaft and shaft to disk pinning allows for tight control.
n MAXIMUM FLOW CONTROL Disk provides equal percent characteristic for improved throttling range.
n PIPELINE ORIENTATION Spring loaded shaft for either vertical or horizontal valve orientation.
n SMALL ACTUATOR PROFILE Actuator prole promotes smaller envelope package size for tight spaces.
n POSITIONER FEEDBACK Linkage-less and non-contact feedback improved reliability in high vibration applications.
Vacuum Box
After the pulp stock is sprayed on the forming fabric, the sheet is still very wet and must be removed. A vacuum box, or flatbox,
under the forming fabric helps to remove the excess water. These valves help to control the amount of vacuum being pulled on the
sheet, and can have a big effect on the rest of the paper machine. Poor control in the forming section can lead to problems with end
product consistency and formation leading to off-spec product.
Product Solutions
Fisher
®
Pulp and Paper Solutions | 23
Paper Machine
Fisher Control-Disk
™
rotary valve, 2052 actuator, and FIELDVUE DVC6200
Paper Machine