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  • Wiring for Damper Actuators and Control Valves (.pdf)
    It is good practice to power electronic or digital controllers from a separate power transformer than that used for actuators or other end devices. The power supply design in our actuators and other end devices use half wave rectification. Some controllers use full wave rectification. When
  • Damper Applications Guide: Constant Volume Damper and Actuator Characteristics (.pdf)
    The economizer portion of an air-handling system is not only responsible for reducing the operating cost of the system, but more importantly, it has to provide a sufficient volume of outside air at all times to ensure good indoor air quality. The function of the economizer also affects the
  • Actuator Sizing for Damper Applications
    You have selected your damper by size and functional requirements, but now the question, "How much actuator do I need to obtain maximum close-off and to withstand the many cycles of operation?" This is a good question, and yet little information is published on this subject. Hopefully the following
  • Fail-safe Actuators: When Failure Is Not an Option
    Actuators are a small part relative to the overall systems they live in. Many of these devices weigh in at only ten or twenty pounds. But they are a small component that plays a crucial role: When it's time for a valve or damper to close, for a flow to stop, or for a system to shut down
  • When are Manual Actuators a Good Fit?
    Actuators can have many different sizes, shapes and functions, but all of them require some sort of input power to move the valve or the damper they are mounted on. On this blog, we have talked about many different input sources in the past, from compressed air for pneumatic actuators
  • Spring Return Electric Actuators Meet Fire Standards for Tunnels
    with mechanical springs that close (or open) the damper upon loss of power at the actuator. Further, the motorized dampers must function at elevated temperatures to be effective. The ProMation PA series of spring return quarter turn, fail-safe electric actuators successfully performed a high temperature
  • Tractor Cab Suspension and Lift Control
    are typically equipped with dampers or combination dampers and leveling cylinders to control ride attitude and damping rates. MTS Temposonics sensors offer control over both velocity and ride height/attitude with one sensor. Their unique ability to monitor more than one magnet allows two section damper
  • Mounting Methods Guide (.pdf)
    Belimo direct coupled actuators were designed to minimize installation cost by what has come to be known as the "Belimo" concept. This concept of directly coupling to the damper shaft was invented in 1975 and was the first of many innovations to make electronic damper actuation the easiest and most
  • Automotive Suspensions
    Active damper and height control can sometimes be combined into a single strut design. By combining an actuator along the same axis as the damper, a complete assembly can be provided to the suspension builder for preloading the spring to control ride height and quality. Adding a Commercial Sensor
  • Going into Shocks
    of energy versus frequency. The histogram is of damper displacement over a single lap. Shock absorbers, or dampers, control the rate at which suspension springs compress and rebound. Unlike passenger-car shocks that have fixed damping rates, racing shocks have fully adjustable rates. As such they can

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