Brochure

Prior to stock entering the headbox, various additives are combined with the pulp during stock preparation. For instance, the combination of
rosin size and aluminum sulfate resists penetration by fluids, and is critical for ink printing operation. Other agents and starches help increase
the paper’s internal strength. Fillers such as precipitated calcium carbonate (PCC) and titanium dioxide help with paper brightness, opacity,
and smoothness of paper.
All agents must be added precisely to pulp stock so the end product meets the particular needs of an end user. Special consideration must be
given because of the low flow and sometimes erosiveness of certain chemicals such as titanium dioxide and PCC.
Paper Additives
Product Solutions
Fisher
®
Pulp and Paper Solutions | 21
Paper Machine
n LOW FLOW CONTROL Optional V-notch ball allows for a wide range of low-ow control options.
n EROSION CONTROL V-notch ball made in a variety of materials for erosive applications.
n ZERO LOST MOTION Splined driveshaft and shaft to ball pinning allows for tight control.
n EXTENDED SERVICE LIFE Heavy duty seal and rugged bearing design are robustly designed for extended service.
n EASE OF MAINTENANCE Low friction bearings with minimal friction provide optimal control and drop-in place.
n REDUCED MAINTENANCE Flanged valve body reduces alignment and installation time.
n SMALL ACTUATOR PROFILE Actuator prole promotes smaller envelope package size for tight spaces.
n POSITIONER FEEDBACK Linkage-less and non-contact feedback improves reliability in high vibration.
Fisher ceramic Micro-Notch ball
Paper Machine