Tuesday, November 14, 2017

Ultrasonic Clamp-On Flowmeter with SIL 2 Rating

SIL 2 capable clamp on ultrasonic flowmeter
FLUXUS F/G70X and F/G80X series meters
Image Courtesy Flexim
Measuring the flow quantity of gases and liquids is a common industrial processing task. There are numerous technologies available for measuring fluid flow, each with its own set of advantages and drawbacks for any particular application. Some of the technologies and methods have been in use for a very long time, with recent enhancements provided by electronics or smart sensor designs.

Ultrasonic flow measurement devices employ a comparatively recent technology to measure gaseous or liquid flow. Whether the transit time differential or Doppler method is utilized, ultrasonic flow meters have a distinctive characteristic in that they can be deployed in a form factor that does not require contact with the the process fluid, nor insertion in the fluid flow path. A common installation method is to clamp the ultrasonic transducer assembly onto the exterior of a process pipe. This makes the technology attractive for applications that involve adding a flow measurement point to an existing piping system.

Flexim, a globally recognized leader in ultrasonic flow measurement, offers a number of permanent and portable units for measuring liquid and gaseous flow rates. Some of their instruments have been certified as SIL 2 capable, along with a host of other third party certifications. The product range includes simple and accurate instruments designed for general industrial use, and extends to multi-beam units intended for applications, such as custody transfer of fluids, that require the highest accuracy and overall performance levels.

Share your flow measurement challenges and requirements with instrumentation specialists, combining your own process knowledge and experience with their product application expertise to develop effective solutions.


Thursday, November 9, 2017

Segmented Ball Rotary Control Valve for Natural Gas Regulation

segmented ball rotary control valve for natural gas
Segmented ball valve for natural gas regulation,
shown with Digital Natural Gas Positioner
Image courtesy GE Becker
The manufacturers of valves and other fluid control components for the processing industries have continuously developed new designs and innovated existing designs to deliver better performance for targeted operating conditions. The available basic valve designs, along with their variants, create an immense catalog of potential candidates for each application.

One such design variant is the segmented ball  valve. It is a quarter turn valve, like its cousin the ball valve, but the trim is different. True to its name, the active closure structure is but a portion of what we know of as a common ball valve. Where the closure mechanism of a ball valve essentially is a solid ball with a hole drilled through it, a segmented ball valve more resembles a section of a sphere or hollowed out ball with a shaped opening in the surface. A primary distinction between the two is that a ball valve contains a passageway through the diameter of the ball that rotates around a central axis. A segmented ball valve functions somewhat more like a gate valve and has no machined pathway through the closure, only a formed surface that restricts a portion of the fluid pathway.

The closure in a ball valve can be floating or trunnion mounted. A segmented ball valve will have a trunnion style mounted closure, with rigid support on opposing points of its diameter. Ball valves, with their rotating fluid pathway resembling a short tube, are generally not the best option for flow control, being better suited for isolation applications. The segmented ball valve functions similar to a sliding gate valve, providing an increasing or decreasing shaped opening as the shaft is turned.

GE Oil & Gas, under the Becker brand name, utilizes segmented ball valves for natural gas regulation applications. There are other industrial applications where this valve type can deliver superior performance and overcome a number of otherwise challenging conditions.

The brochure included below provides more detail on the segmented ball valves targeted for natural gas operations. There are some good illustrations that detail the valve construction. Share your fluid control challenges of all types with valve specialists, leveraging your own process knowledge and experience with their product application expertise to develop an effective solution.

Friday, November 3, 2017

Flexim Wins Recognition for Innovative Flow Measurement

ultrasonic flow meter
Flexim F704 Ultrasonic Flow Meter
Image courtesy Flexim Americas
Flow Control Magazine, which targets solutions for fluid movement, measurement and containment, handed out its annual Innovation Awards recently. Among those receiving honorable mention was Flexim Americas Corporation, for the Fluxus Cryo that provides noninvasive measurement of cryogenic fluids. Special design adaptations prevent ice build up on the measurement apparatus that that can plague other technologies.

Ultrasonic flow measurement offers some distinct advantages over other available methods, with high accuracy, no intrusion into the media, and no moving parts. While the award was specifically for a cryogenic application, Flexim ultrasonic flow measurement instruments are available for an extensive array of applications.

For more information, share your flow measurement requirements and challenges with process instrumentation experts, leveraging your own process knowledge and experience with their product application expertise to develop effective solutions.