New Coriolis flowmeter presses lower limits

Yokogawa introduces low-capacity dual bent-tube Coriolis meter.

11/14/2012


The new ROTAMASS Coriolis flowmeter from Yokogawa.Yokogawa Electric Corporation has released its new RotaMass LR, which it characterizes as the the world’s smallest dual bent-tube Coriolis mass flowmeter. Designed to measure both liquids and gasses, the mass flow measurement spans from 0-40 kg/h, which corresponds to about 0-10.5 gph of water. The accuracy is ±0.15% for liquids and ±0.5% for gasses. The RotaMass LR aims at demand for accurate and stable measurement of fluids at low flow rates. Yokogawa has developed the low-flow Coriolis meter based on its proven dual bent tube design to overcome the current shortcomings of single-tube low-capacity flowmeters. These shortcomings include susceptibility to external vibrations and changes in ambient or process fluid temperatures which lead to less accurate and stable measurements in real-world conditions.

The dual bent-tube design decouples the core measuring element from process vibration that can cause fluctuating zero stability and decreased measurement accuracy. When fluid density changes, a single-tube Coriolis flowmeter can become imbalanced and start to behave like an emitter. This design remains balanced due to the equal mass change in both tubes and the absence of interference from the process piping. By design, it is insensitive to fluctuations in the ambient temperature and achieves excellent zero stability under changing process conditions. The two tubes are made from C-22 alloy, which is less susceptible to thermal expansion than conventional stainless steel.

The tube temperature measurement plays a key role in mass flow and density measurements. Normally, it is more difficult to measure temperature with Coriolis flowmeters that have tubes with a smaller surface area. This design solves that problem by using an inline temperature sensor, ensuring exact and fast measurements in process temperatures ranging from -50 to 150 °C.

Safety is a major concern with this design with a gas-tight, all-stainless-steel secondary containment that can handle pressures up to 65 bar. The meter itself can be used in high pressure applications up to 400 bar. A huge variety of welded process connections are available and no gaskets are used, minimizing the risk of leaks. Where fluid component separation and gas condensation are a concern, insulation and a heat jacket are available as an option.

Takashi Nishijima, a director and senior vice president, and head of the industrial automation platform business headquarters for Yokogawa says, "By measuring and controlling very low flow rates with a high level of precision, Yokogawa is helping its customers realize the VigilantPlant concept. We believe that this newly developed product gives customers a wider range of choices in multi variable process measurement and allows for greater accuracy and steady measurement in their utilization."

www.yokogawa.com

Edited by Peter Welander, pwelander@cfemedia.com



No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2013 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
The true cost of lubrication: Three keys to consider when evaluating oils; Plant Engineering Lubrication Guide; 11 ways to protect bearing assets; Is lubrication part of your KPIs?
Contract maintenance: 5 ways to keep things humming while keeping an eye on costs; Pneumatic systems; Energy monitoring; The sixth 'S' is safety
Transport your data: Supply chain information critical to operational excellence; High-voltage faults; Portable cooling; Safety automation isn't automatic
Case Study Database

Case Study Database

Get more exposure for your case study by uploading it to the Plant Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.

These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.

Click here to visit the Case Study Database and upload your case study.

Maintaining low data center PUE; Using eco mode in UPS systems; Commissioning electrical and power systems; Exploring dc power distribution alternatives
Synchronizing industrial Ethernet networks; Selecting protocol conversion gateways; Integrating HMIs with PLCs and PACs
Why manufacturers need to see energy in a different light: Current approaches to energy management yield quick savings, but leave plant managers searching for ways of improving on those early gains.

Annual Salary Survey

Participate in the 2013 Salary Survey

In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.

Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.

2012 Salary Survey Analysis

2012 Salary Survey Results

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.