Rotork has announced an extensive advancement of CMA electric actuation technology for the operation of process control valves, introducing new options to meet evolving customer and market requirements. With the latest developments, the innovative CMA design can now be specified with increased functionality encompassing local controls, LCD positional display and programmable fail-to-position performance.

Designed for quarter-turn, rotary or linear operation, robust Rotork CMA actuators perform numerous process control valve, metering pump and damper applications demanding precise position control and continuous modulation. Single-phase or DC electrical power is all that is required for simplified installation and control valve actuation. Explosionproof certification to international standards is available for hazardous area applications.

Local controls now offer manual operation at the valve, combined with a vivid LCD display of valve position which also incorporates critical and non-critical fault symbols. Control selection knobs enable selection of Local, Stop or Remote operation and Open or Close input commands in the Local control mode. Each mode can be locked in place to prevent unauthorised operation. The LCD display shows the valve position as a precise percentage of total valve travel.

For fail-to-position performance, a reserve power pack provides the actuator with the ability to perform a predetermined action on power failure. The power pack also preserves position indication on the LCD display during power failure. Upon restoration of mains power, the power pack is swiftly recharged to ensure continued fail-to-position functionality. Action on power loss is easily configured with the standard CMA HMI interface as part of the user-friendly actuator set-up menu, utilising a 6-segment LCD display and push button configuration.

The maintenance-free CMA drive train, environmentally protected to IP67 and permanently lubricated for operation in sub-zero temperatures as standard, can be mounted in any orientation. Accepting an industry-standard 4-20mA control signal, the CMA provides accurate, repeatable and backlash-free positional control. Resolution is 0.2% on linear and quarter-turn applications, 2 degrees on the multi-turn models. All CMA actuators have output speeds that are adjustable down to 50% of full speed in 10% increments and manual operation is provided as standard. Network compatibility encompasses Rotork Pakscan, HART®, Profibus®, Modbus®, DeviceNet® and Foundation Fieldbus®.

The latest CMA developments follow other recent refinements including upgraded electronics, HMI enhancements and a user selectable increased seating torque/thrust option, enabling a more tailored and cost-effective sizing regime to be applied to the combination of modulating and tight seating demands often found in control valve applications. A new rotary model size has also been introduced.

The combination of all these improvements represents a comprehensive advancement of CMA actuator technology and functionality, focussed on precise process valve control, system simplification and reduced maintenance. In addition to traditional control valves, successful CMA applications include choke valves on shale gas installations, stroke adjusters on metering pumps, precision metering on chemical dosing and the operation of dampers.

Designed to address some of today’s toughest measurement challenges in the upstream and midstream natural gas markets, Emerson introduces the Rosemount Analytical 370XA gas chromatograph (GC) for C6+ BTU / CV applications, including custody transfer, power generation and burner fuel/air ratio control. Meant to operate unattended in even the most extreme weather conditions and withstanding ambient temperatures within -20 °C to 60°C (-4 °F to 140 °F), the smarter, compact, and more economical 370XA features advanced technology, improved diagnostics, and an intuitive local operator interface (LOI ). Built-in software assistants included in the LOI guide the user through common operation and troubleshooting tasks, greatly simplifying the installation, startup, commissioning and on-going maintenance of the 370XA.

A unique innovation of the 370XA is its Maintainable Module™ technology. It incorporates the GC’s analytical components inside of a module that can be easily maintained or replaced at the component level in the field in most cases, substantially reducing repair costs and downtime. If the module needs more serious repair, a replacement module can be installed while the damaged one is sent to the lab or back to the manufacturer for further inspection. Upon replacing the module, the GC will automatically begin to self-diagnose and self-calibrate, doing much of the startup on its own and getting back online without having pressed a button.

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Promag D, the wafer device is designed for all applications where space is at a minimum. Combined with Proline 400, the transmitter for optimized measurement of water and wastewater, Promag D 400 will be the preferred basic solution for all applications in the water industry with space restrictions. Promag D 400 also offers time-saving local operation via the integrated web server without additional software and hardware, as well as an integrated verification with Heartbeat Technology™.

Benefits:

• Easy, fast centering of the sensor – innovative housing construction
• Energy-saving flow measurement – no pressure loss due to cross-section constriction
• Safe operation – no need to open the device due to display with touch control, background lighting
• Time-saving local operation without additional software and hardware – integrated web server
• Integrated verification – Heartbeat Technology™

Field of application:

The electromagnetic measuring principle is unaffected by pressure, temperature and flow profile. For basic water applications; optimized for limited space and plastic pipe installations.

Device properties:

• Short installation length and low weight
• Integrated ground disks made of stainless steel
• International drinking water approvals
• Transmitter housing made of durable polycarbonate

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Rosemount Analytical is the leader in oxygen flue gas analyzer technology. The 6888 continues the tradition of integrating an oxygen probe and field electronics into a single, compact package. The probe inserts directly into a flue gas duct to measure oxygen in combustion processes. No sampling system is required, and the newest version offers an optional on-line automatic calibration capability embedded within the probe, freeing up your technician’s time, and ensuring the most accurate O2 readings over time.

The 6888 in situ O2 transmitter provides accurate measurement of the oxygen remaining in the flue gases coming from any combustion process. Optimal combustion efficiency can be obtained by maintaining the ideal level of oxygen in the flue gases coming from these processes and the lowest level of NOX, CO and CO2 are produced.

Easy to use and easy to integrate. This in situ analyzer was designed with customer ease-of-use in mind. There are no moving parts or sampling apparatus resulting in an extremely reliable probe that requires very little maintenance.

Specifications:

• Net O2 range: variable 0-10% to 0-50%(Xi electronics offer 0-50% O2 range)
• Accuracy in oxidizing conditions: ±0.75% of reading or 0.05% O2, whichever is greater
• Lowest detectable limit: 0.02% O2
• Process temperature effect: less than 0.05% O2 from 100-700°C
• System speed of response to calibration gas: Initial response in less than 3 seconds, T90 in less than 8 seconds. Response to process gas changes will vary, depending on process gas velocity and particulate loading of the diffuser
• Calibration validity: Presentation of calibration gases matches the normal process to within ±0.02% O2
• Accuracy in reducing conditions: ±0.1% of reading, or 0.1% O2, whichever is greater
• System response in reducing conditions
• going from oxidizing to reducing -T90 in 120 sec.
• going from reducing to oxidizing -T90 in 30 sec.

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