June, 2014

News from Bronkhorst USA

Mass Flow and Pressure

Measurement and Control

In This Issue

Mix It Up

Not Much To Lose

Added Resource

Good to Know

Laws and Guidelines

Quick Links

Bronkhorst USA

Mix It Up

Aeration

Aeration is a process which circulates mixes or dissolves air (or other gases) in a liquid or other substance.

The robust and highly repeatable D-6300 Mass Stream™ is a perfect fit for any aeration application.

Industrial sectors:

* Ice Cream / Whipped Cream M+W Display

* Beverage

* Soil

* Waste Water Treatment

* Fermentation

* Fish or algae farms

Application requirements:

* High repeatability

* Robustness

* Dirt resistivity

* Easy to check actual flow

* Gas totalization

* Ingress protection class IP-65

Not Much To Lose

Low Pressure Drop Applications

Low Delta P In a number of applications for measuring and controlling gas flows there is only a little differential pressure available and/or allowable. These are the applications for which Bronkhorst High-Tech developed the LOW-ΔP-FLOW series, in which the flow resistance is minimized by using a large bore capillary (thermal bypass sensor) in combination with a cylindrical flow splitter (laminar flow element).

Based on this concept, mass flow capacities between
0...10 mln/min and 0...1000 m3n/h can be measured. At a flow up to 2 ln/min a pressure drop of less than 1 mbar is required.

Furthermore, the larger flow channels minimize the risk of clogging and facilitate the cleaning and purging of these LOW-ΔP-FLOW instruments, which will contribute to a significantly longer lifetime when the instruments are used on corrosive gas service. All fluid wetted parts are of electro-polished stainless steel. Optionally the flow meter body, sensor and flow element can be supplied in
Hastelloy or Monel.

The control of mass flow with small pressure difference comprises the LOW-ΔP-FLOW Mass Flow Controllers in compact construction. The integrated proportional, electromagnetic control valves of these MFC's have extremely fast and smooth control characteristics. Depending on the operating properties, the maximum flow in these models is 1...50 ln/min air-equivalent.

Added Resource

New Bronkhorst Representative

Bronkhorst USA are happy to announce that we have added a new Manufacturer's Representative to our sales channel.

Industrial Automation Services will cover Arizona and New Mexico. Terry Baumann, Shannon Webster and the rest of the experienced team will bring both thermal MFC and Coriolis experience to bear as they support customers in their territory.

They can be reached at:

T: 480-413-0899

F: 480-413-0960

E: sales@iasaz.com

Additionally, we are pleased that Process Solutions now represents Bronkhorst USA in Oklahoma as well as their original territory of Texas. Tony Shekari continues to grow his team and capabilities to support more customers.

Process Solutions can be reached at:

T: (281) 491-3833

F: (281) 754-4792

info@psctexas.com

Good to Know

Accuracy & Repeatability

What is accuracy of a mass flow meter, what is repeatability of a mass flow meter, and what difference does it make?

Accuracy of a mass flow meter is the expression of error (%) as compared to a primary standard. In practical terms it is the degree to which the actual output of the flow meter matches the calibration curve of the flow meter.

Repeatability of a mass flow meter is the amount (%) that any single device can repeat the value previously delivered at the same conditions. In practical terms this means that the output seen at a given set of conditions may, or may not, match the calibration curve of the instrument but it will be the output seen at that same set of conditions.

A highly accurate instrument requires high repeatability, but a highly repeatable instrument does not require high accuracy.

Accuracy & Repeatability

So, why does it matter? Once you identify the needs of an application, and accordingly specify what you are seeking in a mass flow meter, you allow the best instrumentation recommendation to be made.

Increasing accuracy tends to come at an increasing cost which may be justified if required in the application. High repeatability with lower accuracy may be a cost effective solution for a given application.

Speak with us about your application and we will be sure you get what you really need.

Laws and Guidelines

Gerrold�s Laws of Infernal Dynamics

1. An object in motion will always be headed in the wrong direction.

2. An object at rest will always be in the wrong place.

3. The energy required to change either one of the states will always be more than you wish to expend, but never so much as to make the task totally impossible.