Friday, June 28, 2019

A Mass Flow Meter that Works with YOUR Control System: The Brooks SLA5800 Series

SLA5800
Improve your processes with the EtherNet/IP-enabled SLA5800 Series MFC. By adding non-proprietary communications and lightning fast data transfer to the SLA5800’s high accuracy, repeatability and rich data, Brooks Instrument just made the most stable mass flow controller even better. Best of all, it's compatible with all major control system manufacturers, including Allen-Bradley (Rockwell Automation), Emerson DeltaV and Siemens.

The SLA5800 Series mass flow meters and mass flow controllers have gained broad acceptance as the standard for accuracy, stability and reliability. These products have a wide flow measurement range and are suitable for a broad range of temperature and pressure conditions making them well suited for chemical and petrochemical research, laboratory, analytical, fuel cell and life science applications, among others.

Highlights of the SLA5800 Series mass flow products include: industry leading long term stability, accuracy backed by superior metrology systems and methods using primary calibration systems directly traceable to international standards, and a broad range of analog and digital I/O options to suite virtually any application. An independent diagnostic/service port permits users to troubleshoot or change flow conditions without removing the mass flow controller from service.



Flow-Tech, Inc.
410-666-3200 MD or 804-752-3450 VA
https://flowtechonline.com

Tuesday, June 18, 2019

Variable Area Flow Meters

Variable area flow meters

Variable area flow meters, also referred to as Rotameters, have diverse industrial processing applications that range from simple to sophisticated. The devices are easy to install, require no electrical connection, and provide direct flow rate reading. They provide fail-safe flow rate readings in a wide array of industrial applications.

Variable Area Flow Meters: An Overview 

Developed by German inventor Karl Kueppers in 1908, Rotameters measure the volumetric flow rate of liquids and gases. 

Important elements of a variable area flow meter include the tube and the float. Their operation is simple. The tube is fixed vertically and the fluid is fed from the bottom. It travels upward and exits from the top. The float remains at the bottom when no liquid is present and rises upward when fluid enters the tube. 

The float inside the tube moves in proportion to the rate of fluid flow and the area between the tube wall and the float. When the float moves upward, the area increases while the differential pressure decreases. A stable position is reached when the upward force exerted by the fluid is equal to the weight of the float. A scale mounted on the tube records the flow rate of the liquid. Usually, the flow can be adjusted manually using a built-in valve. 

Types of Variable Area Flow Meters 

Variable area flow meters can be categorized by the type of tube they use, which relates to their ability to withstand various pressures, temperatures, process media, and cost. Process connection size and wetted part materials vary as a function of the rotameter type and construction. 

Plastic variable area flow meter
Plastic Tube
Rotameter
(Brooks)

Plastic Tube Variable Area Flow Meter

For many non-corrosive, low-pressure air, water and gas flow applications. Made of machined acrylic or molded polycarbonate.

Applications:
  • Water treatment systems
  • Gas analyzers
  • Air sampling equipment 
  • Desalinization equipment
  • Medical equipment
  • Photo processing equipment
  • OEM machines
Glass variable area flow meter
Glass Tube
Rotameter
(Brooks)

Glass Tube Variable Area Flow Meter

The basic glass variable area flow meter consists of borosilicate glass tube while the float is made of either glass, plastic, or stainless steel. The most common combination is a glass tube and metal float. This is suitable for a measure the flow rate of liquid of low to medium temperatures and pressures. 

Applications:
  • Analytical instrumentation
  • Industrial processes
  • Chemical production
  • Pharmaceutical production
  • Oil & gas extraction
  • Refining processes
  • Fuel cell research
  • Water treatment systems
Metal variable area flow meter
Metal Tube
Rotameter
(Brooks)

Metal Tube Variable Area Flow Meter

Metal tube variable area flow meters are another type that is suitable for temperatures and pressures beyond the physical and mechanical limits of glass tube versions. They are generally manufactured of stainless steel, aluminum, or brass. The piston position is determined by the mechanical and magnetic followers that can be read from the outside of the tube. They are suitable in situations where applications conditions would damage the glass metering tubes, such as steam applications.

Applications:
  • Purge liquid or gas metering
  • Liquid, gas, or oil flow measurement
  • Chemical injection
  • Rotating equipment flow measurement
  • High-pressure flow meters for offshore oil platforms
For more information, contact Flow-Tech, Inc. by calling 410-666-3200 in Maryland or 804-752-3450 in Virginia. Or, stop by the website at https://flowtechonline.com.

Friday, May 31, 2019

Electromagnetic Flowmeters and Dual Frequency Excitation

Magnetic flowmeter
(Yokogawa)
The electromagnetic flowmeter, commonly known as the "magmeter", gets its name from the magnetic field generated within the float tube that produces a signal proportional to flow. This principle employs Faraday's Law of Electromagnetic Induction. Magnetic flowmeters are built so the direction of the magnetic field is perpendicular to the flow and the line between the electrodes is also perpendicular to the flow. As a conductive liquid flows through the flowtube, an electro-motive force is generated. The electrodes detect the electro-motive force. The electro-motive force is proportional to the flow velocity, flux density, and the meter inner diameter. The flux density of the magnetic field and the meters inner diameter are constant values, therefore the magnetic flow meter can calculate the flow velocity and volumetric flow from the electro-motive force.

The basic components of the magnetic flow meter body are:
  • A lined flowtube (typically Teflon)
  • Excitation coils
  • Two electrodes mounted opposite of each other within the flowtube.
Current is applied to the coils in the magmeter to generate a magnetic field within the flow tube. As a conductive fluid flows through the meter, an electro-motiveforce is generated. This force is detected by the electrodes and the resulting value is converted to flowrate.

When magnetic flow meters were originally designed over 50 years ago, they utilized AC type excitation. AC powered magnetic flow meters use line frequency to generate the magnetic field. The frequency of AC excitation is typically 50 to 60 Hertz. This type of excitation has a very fast response time, making it suitable for slurry applications. The weakness of AC type excitation is that it has an unstable zero, and the accuracy is a percent of span, as opposed to a more accurate percent of reading. Because this type of excitation uses line frequency, the power consumption is also very high, making this an expensive meter to operate.

AC and DC excitation
Dual AC and DC excitation
In an effort to improve accuracy and reduce energy cost, pulsed DC type excitation was introduced several years later. The average excitation frequency is between three to eight Hertz, but can go as high as thirty Hertz. The major benefits of pulsed DC excitation over AC excitation is the improved accuracy and zero stability. The accuracy of a DC type meter is a percent of reading. This gives you a more accurate measurement throughout the entire measuring range. Unfortunately, because of the low frequency, the response time is very slow, making it a poor choice for noisy applications.

To overcome the disadvantages of the standard AC and DC excitation methods, and keep the advantage of a high signal-to-noise ratio, Yokogawa's patented dual frequency excitation is the ideal combination. Dual frequency excitation combines the positive benefits of both AC and DC excitation, using both a high 75 Hertz frequency, and a low frequency excitation of approximately six Hertz to drive the coils. Dual frequency excitation is an innovative method that superimposes high frequencies on low frequencies, and utilizes the advantages of each, while eliminating the previously discussed disadvantages. The combination of these methods results in the flow noise immunity and fast response of the high frequency excitation method, and the high zero stability of the low frequency excitation method simultaneously.

For more information on Fike products and capabilities, contact Flow-Tech, Inc. by calling 410-666-3200 in Maryland or 804-752-3450 in Virginia. Or, stop by the website at https://flowtechonline.com.

Wednesday, April 24, 2019

Facility Energy Management and Optimization with Precision Ultrasonic Flow & Thermal Energy Meters

Campus energy management
The controlling, balancing, and monitoring of thermal energy flows is of utmost importance in times of rising energy prices, environmental regulations and financial benefits of energy efficient buildings.

FLEXIM, the leading manufacturer of non-intrusive, clamp-on ultrasonic flowmeters, offers thermal energy meters that make it easy to implement a system for more energy efficient buildings and facilities.


FLEXIM’s energy meters combine the attributes of non-intrusive ultrasonic flow measurement with superior temperature monitoring into an integrated energy computer. All flow transducers and temperature sensors are connected to one unit.

Precision Ultrasonic Flow & Thermal Energy Meter
Click for larger view.
Applications/Uses
  • Chiller Plants
  • Heating Plants
  • HVAC
  • Metering & Verification
  • Retrofits
  • Billing
  • Water Control / Leak Detection
  • Combined Heat and Power / Cogeneration Plants


Tuesday, February 26, 2019

The Brooks GT1600 Industrial Glass Tube Variable Area Flowmeter


The Brooks Instrument GT1600 Series glass tube VA flow meters are a NEW family of meters with a rugged design for long-lasting performance with low and high-flow gas and liquid applications where viewing the process is important. These versatile and economical meters are for general use in applications with moderate metering accuracy requirements — typical accuracy ranges are 1% to 10% full scale, depending on the model selected. They are ideal for purge type service, seal oil systems, bearing lubrication and cooling water indication.

The GT1600 Series flow meters are configurable to retro-fit existing Brooks Instrument GT1000, GT1300 and Full-View® 1100 Series meters (models 1110, 1114, 1140, 1144).

Contact Flow-Tech, Inc. about Brooks Instrument products in Maryland and Virginia.
MD: 410-666-3200
VA:  804-752-3450
https://flowtechonline.com

Monday, February 18, 2019

Drager REGARD 7000 Fixed Gas Detection Systems Product Series

Dräger REGARD<sup>®</sup> 7000
Dräger REGARD® 7000
The Dräger REGARD® 7000 is a modular and therefore highly expandable analysis system for monitoring various gases and vapors. Suitable for gas warning systems with various levels of complexity and numbers of transmitters, the Dräger REGARD® 7000 also features exceptional reliability and efficiency. An additional benefit is the backward compatibility with the REGARD®.

Download complete Dräger REGARD® 7000 brochure and specification from this link on the Flow-Tech website.

Flow-Tech, Inc.
https://flowtechonline.com
MD: 410-666-3200
VA:  804-752-3450