Tag: coating

No Drip, External Mix, Atomizing Spray Nozzle Overview

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No Drip ASN
EXAIR’s No Drip, External Mix, Atomizing Spray Nozzle In Action!

EXAIR’s Atomizing Spray Nozzles are used to clean, coat, or cool parts and they also lend themselves very well to humidification and dust control.  They are constructed from rugged and durable 303 SS to provide corrosion resistance and they can operate in temperatures up to 400°F (204°C). All EXAIR Atomizing Spray Nozzles are also CE compliant.

Atomizing Nozzles are separated into 5 categories – Internal Mix, External Mix and Siphon Fed, Deflected Flat Fan, and Internal Mix 360° Hollow Circular Pattern.  They are available in 1/8″, 1/4″ & 1/2″ NPT to make it easy to provide the coverage and flow rate you need for nearly any application.  For today’s focus, we will discuss the No Drip External Mix Atomizing Nozzles.

External Mix Atomizing Nozzles have the highest flow rates and are ideally suited where precise liquid flow is required and both the air and liquid are pressurized.  Also the External Mix Atomizing Spray Nozzles can easily atomize liquids with a viscosity above 300 cP (Centipoise).

Centipoise is defined as a dynamic viscosity measurement unit. A Centipoise (cP) is a non-SI (non-System International) measurement unit of dynamic viscosity in the centimeter gram second (CGS) system of units.

Centipoise Chart

Our patented No Drip feature positively stops the liquid flow when the supply air pressure drops below 20 PSIG for 1/8″ NPT Nozzles or 30″ PSIG for the 1/4″ or 1/2″ NPT. By incorporating this feature into the design, it eliminates the need for any additional valves or supply lines.  They are available in flow rates that range from less than 2 GPH (7.57 LPH) for our Model EF9010SS 1/8 NPT No Drip External Mix Narrow Angle Flat Fan Pattern and up to 303 GPH (1,147 LPH) for the Model EF6010SS 1/2 NPT No Drip External Mix Narrow Angle Flat Fan Pattern.

When making a selection, below are some points to consider:

  1. Volume of liquid required?
  2. What is the viscosity of the liquid?
  3. What type of spray pattern fits the application?

If you would like to discuss External Mix No Drip Air Nozzles or any of EXAIR’s safe, quiet & efficient compressed air products, I would enjoy hearing from you…give us a call.

Steve Harrison
Application Engineer
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No Drip Internal Mix Deflected Fan and 360° Hollow Circular Pattern Atomizing Nozzles

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EXAIR offers a wide variety of  Atomizing Spray Nozzles that can be used to coat, rinse or cool a surface. We manufacture (3) different types – Internal Mix, External Mix, and Siphon Fed – as well as 3 different sizes – 1/8″ NPT, 1/4″ NPT and 1/2″ NPT – all in 303ss construction, rated up to 400°F.

Today, I would like to focus on 2 specific Atomizing Nozzles – our No Drip Internal Mix Deflected Fan Nozzle and our Internal Mix 360° Hollow Circular Pattern Nozzle.

Model AD2010SS – No Drip Internal Mix Deflected Flat Fan Atomizing Nozzle, 6.9 GPH, 1/4″ NPT

The No Drip Internal Mix Deflected Fan Atomizing Nozzle produces a flat fan of atomized liquid at a right angle to the nozzle’s orientation and is designed for use in pressured fed applications where the liquid doesn’t need to be controlled independently from the pressurized air. This nozzle is the perfect choice in processes where mounting space is limited like spraying solvent on conveyed parts inside a small chamber or coating the inside of an enclosure. The patented No Drip feature positively stops the liquid flow when the supply air pressure drops below 30 PSIG, eliminating the need for any additional valves or supply lines.  This is especially beneficial in applications using expensive fluids or where drips can ruin a finished product. This nozzle is available with 1/4″ NPT inlets and flows as high as 6.9 gallons per hour.

 

Internal Mix 360° Hollow Circular Pattern – designed to spray evenly, away from the nozzle in all directions.

Our Internal Mix 360° Hollow Circular Pattern Atomizing Nozzles produce a circular spray pattern, the ideal solution when trying to coat the inside of ductwork or where a broad mist of atomized liquid is necessary, like dust suppression or humidification. Available in 1/4″ NPT with flows as high as 14.7 GPH and spray diameters up to 53″ in diameter  depending on air and liquid supply pressures. With the 1/2″ NPT, we can achieve up to 150 GPH with a spray diameter up to 156″. Our  standard Atomizing Nozzles also feature an adjustment valve to provide control of the flow rate, making them easy to adapt to a specific requirement.

If you have an application requiring a fine mist of atomized liquid, please contact one of our application engineers and let us know how we can help in making the best product selection to fit your need.

Justin Nicholl
Application Engineer
justinnicholl@exair.com
@EXAIR_JN

Super Air Wipe Controls Coating Thickness On Tubing

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A large manufacturing company called looking for a better solution to control the thickness of a curing agent being applied to the outside of tubing used in the automotive industry. The tubing is formed in an extruder and travels through a liquid cooling chamber and then air dried. After the tubing is dried, it is sent to a spray chamber where the curing agent is applied to the exterior. On the exit side of the spray chamber, the customer had installed several flexible air lines placed around the perimeter of the tubing to blow air across the surface to help control the coating thickness. This worked somewhat but they were seeing an increase in the amount of rejected material as the air pattern was sporadic and uneven, which caused streaking and dry spots in certain areas of the tubing. They reviewed our web site and familiarized themselves with our Air Wipes but were unsure of the best design and size to fit their need so they reached out for assistance.

After further discussing the process, their tube O.D. sizes range from 3/8″ – 1/2″, making our 1″ Air Wipe the ideal solution. As far as the design, the Standard or Super Air Wipe, I recommended they use our Model # 2451 Super Air Wipe kit due to the aluminum construction and stainless steel wired braided hoses being able to withstand the potential temperature in the area of 200°F. The kit includes a filter separator to remove any water or contaminants in the supply and a pressure regulator which would allow them to control the flow and force of the exiting air, to help “dial” it in to fit the demand of the application.

Super Air Wipe is available in sizes from 1/2″ up to 11″ in Aluminum construction and up to 4″ in Stainless Steel construction.

 

EXAIR Air Wipes features a split design, which can easily be clamped around the material, to provide a 360° uniform airflow, perfect for treating the surface of round shapes, like extruded tubing. If you have an application where you are needing to dry, cool or clean the outside of a pipe, hose or cable, contact an application engineer for help making the best product selection.

Justin Nicholl
Application Engineer
justinnicholl@exair.com
@EXAIR_JN

360° Hollow Circular Atomizing Nozzle Ideal For Treating Ductwork

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There are many times we field calls from customers that fall directly in line with the intended use of one of our products. Such would be the case last week when a customer called looking for  a more reliable way to spray a light coating of rust inhibitor on the inside of a small section of ductwork roughly 9″ in diameter.  They were currently using a liquid only spray nozzle but were having trouble controlling the output flow, as well as the actual spray pattern. They were wasting a lot of the inhibitor as it was starting to “pool” in the bottom of the ductwork which would ultimately leak out onto the production floor and operator’s work area when the parts were prepared for shipment, also creating an unsafe work environment.

Model # AT1010SS Internal Mix 360° Hollow Circular Pattern Atomizing Nozzle

 

After discussing the application with the customer, I recommended our Model # AT1010SS Internal Mix 360° Hollow Circular Pattern Atomizing Nozzle. The circular spray pattern is the ideal solution when trying to coat the inside of a duct with rust preventative. The nozzle produces an even spray pattern up to 53″ in diameter with flows as much as 14.7 gallons per hour of liquid, depending on air and liquid supply pressures. Our Atomizing Nozzles also feature an adjustment valve to provide control of the flow rate as well. The 303ss construction is able to withstand corrosive environments and temperatures up to 400°F (204°C).

EXAIR offers a wide variety of Atomizing Nozzles that can be used to coat, rinse or cool a surface. They are also commonly used for dust suppression due to the wide coverage area they produce. For help selecting the correct Model # for your application, give us a call.

Justin Nicholl
Application Engineer
justinnicholl@exair.com
@EXAIR_JN