For air-operated control valves, the pneumatic power at a constant supply pressure is proportional to the mass flow rate of instrument air. The pneumatic/eletro-pneumatic/microprocessor-based digital valve controller is used on most control valves operated in closed-loop control, where the input signal is continuously changing.
Valves, Actuators & Regulators
Connecting with Experts in the Spring Event Season
March 12-16, is a face-to-face meeting in Houston, Texas, the 2023 Spring Meeting and 19th Global Congress on Process Safety. Some of the Emerson presenters and topics include: Jacob Tardoni—Mapping an Evacuation in Real-Time: Digital Mustering with Wireless Personnel Location Technology; Greg McMillan—Best Practices in Column Control Distilled, and Control Valve Response Modeling and Control.
Pick the Right Control Valves for Ethylene Service
In a Hydrocarbon Engineering article, Control Valve Selection for Ethylene Plants, Matthew Wagner describes how to choose the right combination of valve style, trim type, materials of construction, and digital positioners for critical valve application in an ethylene unit.
The Hydrogen Economy
The adoption of hydrogen as a green energy resource has been developing for decades, and it is now accelerating as the stage has been set for the gas to play a prime role to meet the world’s environmental, social, and governance goals.
Additive Manufacturing the Fisher Cavitrol Hex Trim–The Cool Parts Show
The Cool Parts Show’s episode, 3D Printed Valve Part Helps Prevent Cavitation, explains cavitation and its damaging effects on the surrounding process, how the Fisher Cavitrol Hex Trim helps mitigate cavitation, and the additive manufacturing process to create this ball valve component.
Simplifying Safety Valve Installation and Maintenance
In a Hydrocarbon Processing article, “Simplifying Safety Valve Installation and Maintenance”, Kurtis Jensen & Lura Parrent highlight new technologies on how to simplify safety valve installations while improving performance and reliability.
Isolate and Protect in Hydrogen Dispensing Maintenance Operations
The TESCOM AGI Double Block Bleed (DBB) and Hand Valves enable fueling station operators to maintain a safe working environment during instrumental maintenance routines. These maintenance-free valves feature a positive double-block arrangement that protects workers after they isolate process pressures, while their modular design reduces the number of potential leakage points.
In-Service Testing of Pressure Relief Valves
In a Power magazine article, “In-Service Testing of Pressure Relief Valves”, June DelGrosso highlights equipment that can perform accurate testing of relief valve setpoints without taking them out of operation.
How to Maintain Direct-Operated Pressure Regulator
This 3:17 video, Maintaining the Fisher 627BM Direct-Operated Pressure Regulator, guides viewers through the procedures required to maintain the new Fisher 627BM pressure regulator.
Specifying Severe Service Control Valves
In the November 2022 InTech Focus article, Specifying Severe Service Control Valves, Emerson’s Justin Goodwin describes techniques for correctly choosing control valves for severe service applications.
High-Capacity Direct-Operated Pressure Regulator
A quick 2:21 YouTube video, Fisher 627BM High-Capacity Direct-Operated Pressure Regulator, shows this extension to the Fisher 627-product family. It can displace oversized pilot-operated & parallel runs of direct-operated regulators.
What are Bellows in Pressure Relief Valves?
The Bellows Leak Detection solution is a safer and more efficient method for detecting bellows failures and emissions. It consists of a backup piston and a Rosemount™ wireless or wired pressure transmitter.
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