A decision to replace more than 300 aging damper actuators forced Entergy to make a choice between pneumatic and electric actuator designs. At Entergy’s Independence Plant in Newark, Ark., two ...

Zoning in forced-air systems is accomplished by controlling dampers that are located within the ductwork system. Dampers open, close, or modulate depending on the demand from the controller. Air is ...

THIS column provides information about the use of outdoor air dampers in hot and humid climates and during hot and humid seasons in temperate climates in commercial buildings. Terms used in this ...

The motorized damper (TMD520) is designed to introduce fresh air into the building envelope through an intake damper that is controlled by the microprocessor-based ventilation control interface. The ...

Pneumatic furnace damper drives may be more common, but electro-hydraulic actuators provide several advantages to the more traditional control scheme. One fossil-fired plant in Taiwan achieved more ...

THE ELECTRIC UTILITY industry’s transition into the age of deregulation is driving the need to improve the thermal performance of fossil-fueled plants. In order to stay competitive utilities must ...

The goal of pneumatics-system design is often to run actuators as fast as possible without introducing excessive shock loads to the system. At low speeds, a cylinder piston can usually hit the end cap ...