In 2011, the City of Durham’s North Water Reclamation Facility (WRF) identified an opportunity to improve reliability and reduce maintenance costs associated with their ducking skimmer scum troughs by replacing the multi-rev electric actuators with Beck rotary actuators. Scum troughs remove sludge from the surface of the feed water and are integral to most primary, secondary and final clarifiers.

The ArcelorMittal – Galati mill was having trouble maintaining a reducing atmosphere in their continuous galvanizing preheat furnace. An oxygen starved environment within the furnace is created by maintaining slightly fuel rich combustion at the burners. This limits oxidation of the steel sheet, improving quality as it’s heated prior to coating. Combustion air flow is monitored and, in a cascade control scheme, the gas valve is adjusted to control CO to a level of 4 to 6%.

Precise control of fan fluid couplings is critical to boiler performance, and structural integrity. This pulp mill performed an evaluation of their Recovery Boiler FD & ID fan application to determine the cause of cyclical speed fluctuations.

The SSAB facility in Axis, AL is a steel mini-mill that manufactures plate and coiled products, and it became commercial in April 2001. Major equipment in service includes a Fuchs 175-ton twin-shell electric arc furnace, twin-station ladle metallurgy furnace (LMF), slab caster, rolling mill with a reheat furnace, and plate finishing facilities. PLC controls are used in all areas.

Sunoco’s Philadelphia refinery, now owned by Philadelphia Energy Solutions, identified an opportunity to improve operating efficiencies and safety of their low-sulfur gasoline (LSG) production units.