New Fisher instrument is available in an explosion-proof package with HART or Foundation Fieldbus protocols.
Emerson Process Management has expanded its FIELDVUE instrument product line with the DVC6200 Series digital valve controller, featuring linkage-less, non-contact feedback technology. The FIELDVUE DVC6200 instrument was designed for applications that experience high levels of vibration, corrosion, or material entrapment. The linkage-less, non-contact feedback technology improves reliability by eliminating linkage wear.
The instrument has undergone EMC (electro-magnetic compatibility) testing to meet IEC standards and will ship with the CE mark. It is available with either the HART or Foundation Fieldbus communication protocol.
Orica Mining Services put the new device to work in its Kooragang Island facility in New South Wales, Australia. Orica, a leading supplier of commercial explosives and blasting systems for the mining and construction industries, is a long-time user of Emerson products. The Orica facility at Kooragang Island is the second-largest in the world producing ammonia nitrate.
The Kooragang site has standardised on Fisher valves with FIELDVUE instruments. The plant also uses Emerson’s 375 Field Communicator and AMS Device Manager with ValveLink SNAP-ON application software as part of its calibration, valve-monitoring, and predictive maintenance system.
Orica personnel worked with the local Emerson office to improve the performance of a Fisher valve in liquid ammonia service. The valve’s high-cycle service conditions and the ammonia atmosphere in which it operates represent one of the most severe environments in any process plant. Emerson engineers recommended the new FIELDVUE DVC6200 instrument with linkage-less, non-contact feedback technology for this harsh application.
Using basic hand tools, Orica’s Instrument Technician Richard Fielding installed the new FIELDVUE DVC6200 instrument on an ammonia-service valve. “This device was easy to install, program, and set up,” he said. “It has been operating trouble-free and has enabled this critical valve to provide accurate and repeatable response throughout its range of travel.
The reliability of the instrument, plus its on-line monitoring capabilities, enables Orica’s operators to avoid manual checks and valve repairs in areas filled with ammonia vapours. Since installing the device, Orica has not experienced any production losses due to valve failures.
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