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5,128 Results Found
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FeatureUse Signal Characterization in the DCS to Linearize the Installed Flow Characteristic of a Valve
Signal characterization in a DCS can solve problems resulting from signal characterization in the valve positioner. -
FeatureWhat Can be Done to Increase Innovation in PID Control?
How can we facilitate efforts to take advantage of the remarkable increases in the capabilities and opportunities in today’s PID controllers? -
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AutoQuiz: In Liquid Flow, What is the Collapse or Implosion of Bubbles Called?
In liquid flow, what is the collapse or implosion of bubbles called? -
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How to Eliminate Split Range Oscillations in Process Control
Use precise valves, scheduled tuning, external-reset feedback, directional rate setpoint limits, and an enhanced PID to stop split range oscillations. -
FeatureInnovations in Butterfly Control Valve Technology
In an effort to advance control valve technology, industrial designers have developed new butterfly valve innovations. -
FeatureAutoQuiz: How to Calculate Rated Torque with Variable Frequency Drives
The volts per hertz ratio (V/Hz) controls the torque of a motor. As long as this ratio is in proportion with the nameplate rating, the motor will develop rated torque. -
FeatureAutoQuiz: What Part of a Globe Valve Has the Same Purpose as the Disk in a Butterfly Valve?
What part of a globe valve has the same purpose as the disk in a butterfly valve? -
FeatureHow to Manage Control Valve Response Issues in the Field
A sensitive flow measurement is needed to identify the installed flow characteristic online. -
FeatureAutoQuiz: What Is the Liquid Flow Condition Where Falling Static Pressure Causes Formation of Vapor Bubbles?
The first stage of cavitation is the formation of vapor bubbles within the liquid system because of the fluid's static pressure falling below the fluid vapor pressure -
FeatureAutoQuiz: What Is the Purpose of a Valve Positioner?
A valve positioner adjusts the pneumatic output to a valve actuator so that the requested position of the valve from a controller is achieved. -
FeatureAutoQuiz: Why Must Voltage Be Reduced Along with Frequency in a Variable Frequency Speed Controller?
To maintain a constant (rated) flux density, the applied voltage must also be changed in the same proportion as the frequency (per Faraday’s law). -
FeatureAsset Management Systems Increase Reliability and Efficiency
Asset Management Systems Increase Reliability and Efficiency -
FeatureAutoQuiz: Which Valve Actuation Method Is Best for a Very Large Force and a Small Actuator?
Hydraulic actuators are driven by a high-pressure fluid (up to 4,000 psig) that can be delivered to the actuator by a pump that is remote from the actuator itself. -
FeatureHow to Prevent Cavitation in Butterfly Control Valves
Cavitation is the bane of the industrial valve designer & valve user alike. It causes severe damage to valve trim & creates sound levels exceeding 110 dB. -
FeatureWhat Process and Equipment Effects Need More Attention?
How can we better understand how process and equipment design and operating conditions affect automation system design, installation, and performance? -
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AutoQuiz: Condition When Percentage of Flow Through a Valve Equals the Percentage of Plug Movement
What does it mean when the percentage of flow through a valve equals the percentage of plug movement? -
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Compensation for Cascade Dead Zones in Proportional Control Valves [technical]
The cascade dead zones problem in a typical two-stage proportional directional control valve is analyzed and a cascade dead zones model is developed for the main stage spring constant. -
FeatureSliding-Mode Control of Induction Motor Using Space Vector Modulation
A novel sliding-mode control of induction motor using space vector modulation technique -
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AutoQuiz: How to Calculate the Pressure Recovery Factor for Valves
Pressure recovery factor is the increase in fluid static pressure that occurs as fluid moves through a valve from the vena contracta to the valve's outlet and downstream piping. -
