Henri Coanda and his Effect on Compressed Air

Henri defined the Coanda Effect – the tendency of a jet of fluid emerging from an orifice to follow an adjacent flat or curved surface and to entrain fluid from the surroundings so that a region of lower pressure develops.

Compressed air flows through the inlet (1) to the Full Flow (left) or Standard (right) Air Knife, into the internal plenum. It then discharges through a thin gap (2), adhering to the Coanda profile (3) which directs it down the face of the Air Knife. The precision engineered & finished surfaces optimize entrainment of air (4) from the surrounding environment.

Henri-Marie Coanda (1885-1972) discovered the Coanda Effect in1930. He observed that a stream of air (fluid) emerging from a nozzle tends to follow a nearby curved surface, if the curvature of the surface or angle the surface makes with the stream is not too sharp. For example, if a stream of fluid is flowing along a solid surface which is curved slightly from the stream, the fluid will tend to follow the surface.

A number EXAIR products are designed to utilize the Coanda Effect and aid their performance. In some products, the Coanda Effect aids to create an amplification area where additional ambient air is drawn into the total airflow to increase total volume of air upon a target. This creates a more efficient and effective product. Also, since not as much compressed air is required, the noise levels decrease for products like EXAIR’s air knives, air nozzles, air jets and air amplifiers. EXAIR has been successful with positive impact for compressed air energy savings and noise reductions helping us meet or exceed OSHA Standard 29 CFR-1910.95 9(a) Maximum Allowable Noise Exposure.

Please contact EXAIR with regards to our Intelligent Compressed Air Products. We can help you with your next cooling, blow-off, drying or any compressed air needs.

Eric Kuhnash
Application Engineer
Email: erickuhnash@exair.com
Twitter: @EXAIR_EK

1- Spoon Coanda image- https://creativecommons.org/licenses/by-sa/2.5/deed.en

EXAIR High Temperature Cabinet Cooler System

Inside, outdoors, high temperature, dirt/dust/humidity, corrosive and classified environments are no problem for EXAIR Cabinet Cooler Systems

EXAIR Cabinet Cooler® Systems will help eliminate downtime due to heat, dirt and moisture. Our Cabinet Cooler® Systems are UL listed to maintain NEMA 4, 4X and NEMA 12 integrity. All high temperature cabinet coolers are UL listed and CE compliant. Our Cabinet Coolers are a reliable way to cool and purge electrical control panels from the use of vortex tube technology, which creates cold air from normal compressed air.

One of our specialized applications are for Cabinet Cooler® Systems in areas with hotter than normal ambient temperatures. Sometimes electrical cabinets are located in environments near high heat sources such as boiler rooms, furnaces, ovens or other heat sources. If the ambient temperature is above 125° F (52° C) we offer a High Temperature Cabinet Cooler systems.

EXAIR High Temperature coolers offer relief for ambient temperatures ranging from 125° – 200° F (52°C – 93°C). Our Cabinet Cooler calculator found at www.EXAIR.com will automatically determine if the High Temperature cooler is required for your specific application.

The High Temperature Cabinet Cooler systems are stock items, ready to ship and easily installed. If you have questions or need more information please contact any of our Application Engineers.

Eric Kuhnash
Application Engineer
Email: erickuhnash@exair.com
Twitter: @EXAIR_EK

Understanding UL Compliance Marks

UL stands for Underwriter Laboratories, a third-party certification company that’s been around for over a century. UL was founded in 1894 and Headquartered in Northbrook, IL. UL is a privately held company with over 14,000 employees and located in over 36 countries*. They certify products with the aim to make the world a safer place for both workers and consumers. Besides testing, they set industry standards to follow when innovating new products. 

EXAIR is UL recognized within our Static Eliminators, Cabinet Cooler Systems and Hazardous Cabinet Cooler Systems. The UL Component Recognized mark below is what you will see on our static eliminating products including our GEN 4 Power Supplies, GEN 4 Ion Bars and Intellistat Ion Air Gun.

If a product or device carries one of these markings, it’s been evaluated for safety by top professionals in the field.**

This mark is seen least often because it is specifically used on component parts that are part of a larger product system. This component mark is used on a wide range of products including but not limited to power supplies, industrial control equipment and many other products. You will notice the “C” and “US” on either side of the main logo indicating the product has been tested for compliance for both Canada and US requirements.

EXAIR Cabinet Cooler Systems have The “Listed” UL marking indicating that the product meets the requirements and have passed the testing required to gain the mark for specific characteristics.

EXAIR Cabinet Cooler Systems have the following UL Marking indicating they are UL Listed for both Canada and USA requirements.

If a product or device carries one of these markings, it’s been evaluated for safety by top professionals in the field.

EXAIR has NEMA 12, 4 and 4X Cabinet Cooler Systems and each are UL Listed to maintain NEMA Integrity:

NEMA 12 (IP54) Cabinet Coolers: (Dust tight, oil tight) are ideal for general industrial environments where no liquids or corrosives are present.

NEMA 4 (IP66) Cabinet Coolers: (Dust tight, oil tight, splash resistant, indoor/outdoor service) incorporate a low pressure relief valve for both the vortex tube and cabinet exhaust. This valve closes and seals when the cooler is not in operation.

NEMA 4X (IP66) Cabinet Coolers: (offer the same protection as NEMA 4 but are constructed of stainless steel for food service and corrosive environments.

Note: some cabinet Coolers have thermostats that are UL Listed and Solenoids which are UL Recognized.

Our Hazardous Cabinet Cooling Systems have been tested by UL and meet the stringent UL requirements for service in use in Class I, Group A,B,C and D. Class II, Group E,F and G. and Class III. EXAIR Hazardous Cabinet Coolers have a UL Marking as shown below:

UL Classification for EXAIR Cabinet Cooler Systems

UL’s Marks for our Classification service appear on representative samples of products that UL has evaluated with respect to specific properties, a limited range of hazards or suitability for use under limited or special conditions. In the Classification service, UL determines that a manufacturer has demonstrated the ability to produce a product complying with UL’s requirements with respect to; specific risk, specific conditions, compliance to regulatory codes & standards, and/or other conditions as determined by UL.

All products carrying any UL mark are subjected to UL’s Follow-Up Services program to regularly confirm continued compliance with UL’s requirements.

If you have questions about our UL recognized products please contact any of our Application Engineers.

Eric Kuhnash
Application Engineer
E-mail: EricKuhnash@exair.com
Twitter: Twitter: @EXAIR_EK

*data and trademarks provided from UL.com
**UL and the UL logo are trademarks of UL LLC © 2022. All rights reserved.

EXAIR Chip Trapper: Extend Coolant Life, Save Money

Chip Trapper Cut Away

The EXAIR Chip Trapper is a great way to clean/recycle your machine coolants resulting in reduced machine wear while decreasing the surface area for microbial growth. The Chip Trapper vacuums coolants or liquid that is filled with debris and traps the solids in a reusable filter bag.

Accumulation of swarf (chips, fines, debris) promote bacterial and fungal growth. The unwanted debris will not only cause damage to your machines but also promotes bacteria growth. Bacteria thrives on wet parts and also live in sludge found settled in machine sumps and/or coolant flumes. Poor housekeeping encourages the growth of bacteria and will add microorganisms to your system.

The Chip Trapper uses a compressed air powered Reversible Drum Vac that can fill or empty a 55 gallon drum in less than two minutes. The Chip Trapper comes in three sizes of 30, 55 and 110 gallon capacities. Once filled you can set the control valve to “empty” to pump the liquid out while containing the solids in a reusable filter bag.

The Chip Trapper is built to last. The stainless steel pump has no motors or impellers to clog or wear out and there is no electricity or shock hazard. There is also a built-in pressure/vacuum relief and automatic safety shutoff valve preventing spills and overflowing. If you have questions regarding our Chip Trapper or would like a quote please contact one of our Application Engineers.

Eric Kuhnash
Application Engineer
E-mail: EricKuhnash@EXAIR.com
Twitter: @EXAIR_EK