The Carmeuse lime plant in Maysville, KY has had Beck actuators installed on most of their important control applications for over 30 years. These include primary air, coal mill air, preheater vents, and kiln ID fans. Many of the units installed during original plant construction in the mid-1970’s are still in service. The plant experienced a torque related problem with a 34 year old actuator on a critical ID fan damper actuator. A new motor was installed, without having to remove the actuator from service, returning the damper to operation quickly.

The ethanol blending process is a critical part of petrol terminal operation and has a significant impact on product quality, meeting environmental regulations and profitability. Optimising the process is very important, but does present some control challenges. For example, thermal expansion of petrol and ethanol do not occur at the same rate, and the blended mixture has to be isolated from water due to ethanol’s miscibility in water.

One of the largest wastewater treatment plants in the world recently finished a project for upgrading its sludge valve actuators. In a wastewater treatment process, these valves drain activated sludge from a reservoir and send it to a digester where it is processed. Normal operation of these valves is carried out using a manual handwheel; however, the operation is also commonly accomplished by means of electric, hydraulic or pneumatic actuators.

Moline (IL) Water Filtration Treatment Plant purifies water from the Mississippi River and supplies drinking water to city residents. Plant personnel are constantly working to improve processes in an effort to exceed stringent state and federal regulations. The plant removes particulate matter from the river water using eight mixed media rapid gravity filters.

The City of Stuart Advanced Water Reclamation Facility is a wastewater treatment plant that produces near-potable, reclaimed water for irrigation uses in South FL. The plant was built in 1955 and most recently upgraded in 2011. The treatment process includes a Dissolved Oxygen System with (3) Aeration Basins. Installing Beck electric actuators on the aeration blower control valves has improved process stability and plant operations.

Common bitumen extraction techniques used throughout the Alberta oil sand region include the Steam-Assisted Gravity Drainage (SAGD) and the High Pressure Cyclic Steam Stimulation (HPCSS). As the names imply, both processes require the controlled injection of high pressure steam into wells below the ground surface.

The Port St. Lucie Prineville Reverse Osmosis (RO) Water Treatment Plant has been supplying drinking water to the area since 1998. The RO equipment has a capacity of 11.15 MGD with 5 Membrane Skids. Replacing conventional electric actuators with Beck on the feed and membrane valve on one skid yielded significant benefits:

Controlling furnace draft pressure is a critical part of overall crude heater combustion control and operation. Furnace draft has a profound effect on combustion efficiency, stack emissions, heater life and operating safety. Pressure excursions – positive or negative – cause inefficient combustion and can lead to heater damage and unsafe operating conditions. Since the furnace draft pressure is controlled by the heater’s stack damper, it follows that the stack damper actuator plays an important role in overall heater efficiency and safety.

In March 1996, EPRI sponsored a demonstration project to showcase the potential for reducing NOx emissions by improving combustion control without the use of SOFA or Low-NOx burners. The project scope included the installation of Beck Drives on the windbox dampers, burner tilts, coal mill dampers, fan dampers and boiler feed pump fluid couplings. A Foxboro IA DCS and Rosemount sensors were also installed. TVA/EPRI is convinced that the accuracy and repeatability of the Beck drives has allowed them to maximize NOx reduction and improve boiler efficiency.