Selecting the right flowmeter

Each flowmeter technology has its pros and cons; learn how to select the best flowmeter based on your specific flow criteria.

09/26/2013


Congratulations! Your company has decided to purchase a flowmeter to measure flow through your pipes. Now the bewildering task of selecting the proper flowmeter begins.

Although it would be nice to have a single flowmeter technology which can be used to measure all your flowmeter applications, whether they are steam, liquid or gas, no such flowmeter exists. Each flowmeter technology has its particular strengths. The goal is to select the best flowmeter based on your specific flow criteria.

The following are questions to consider prior to selecting your new flowmeter:

What fluid is being measured?
Steam has different fluid properties than water, and meters are made to handle specific fluid properties. For example: A magnetic flowmeter meter is good at measuring conductive liquids such as water, but cannot measure good steam adequately.

What is the fluid temperature?
Flowmeters use different materials in their design, each design has temperature limits.

What is the fluid pressure?
Flowmeters are designed to measure up to a specific pressure, therefore knowing the fluid’s pressure helps narrow the options.

What is the required accuracy?
If the meter is being used for billing, higher accuracy is recommended.

What is the meter line size?
Meters come in different line sizes. Knowing the line size determines which meter can be used.

What is the flow range?
Knowing the range between the minimum and maximum flow rate is critical to meter selection. If the flow range is unknown and the process is not consistent sometimes the widest flow range, referred to as turndown, is the best solution.

Can the process be shutdown
If the process is critical, for instance at a hospital, and the flow cannot be shutdown then a meter which can be installed while there is flow in the pipe is the best solution.

How much straight run is available?
Flow meters need a consistent flow profile to measure accurately. This is achieved by adequate straight pipe runs before and after the meter and is referred to as straight runs. Meter technologies have different straight run requirements to meet their accuracy. If the straight run is limited, a flow technology which requires shorter straight runs will be recommended.

Content provided by Spirax Sarco, originally published in Steam News Magazine.



No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Robotic safety, collaboration, standards; DCS migration tips; IT/OT convergence; 2017 Control Engineering Salary and Career Survey
Integrated mobility; Artificial intelligence; Predictive motion control; Sensors and control system inputs; Asset Management; Cybersecurity
Big Data and IIoT value; Monitoring Big Data; Robotics safety standards and programming; Learning about PID
Featured articles highlight technologies that enable the Industrial Internet of Things, IIoT-related products and strategies to get data more easily to the user.
This article collection contains several articles on how automation and controls are helping human-machine interface (HMI) hardware and software advance.
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Mobility as the means to offshore innovation; Preventing another Deepwater Horizon; ROVs as subsea robots; SCADA and the radio spectrum
Future of oil and gas projects; Reservoir models; The importance of SCADA to oil and gas
Big Data and bigger solutions; Tablet technologies; SCADA developments
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me