Tag: liquid coating

Super Air Wipe Controls Coating Thickness On Tubing

Published on by exaircorpLeave a comment

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

Finding the Right Atomizing Spray Nozzle

Published on by Neal RakerLeave a comment

atomizing nozzle

It seems that our Atomizing Spray Nozzles are becoming more and more popular to our customers and distributors overseas. Many times customers have applications that require a liquid be applied to a target surface in as efficient and sparing manner possible. At first glance, the EXAIR Atomizing Nozzle product line might look daunting to the un-initiated. However, if you break the application down into five simple questions, chances are you will be able to find the right nozzle that suits your need.

What are those five questions?

  1. What spray pattern do you want to produce? EXAIR offers Narrow angle round, wide angle round, flat fan, deflected flat fan, and 360° hollow circular spray flow patterns. Which one you pick depends on a variety of factors.
  2. What size area would you like to cover with the spray coming from the EXAIR Atomizing Nozzles? Sometimes it may be necessary to divide the area of a material coating process up over multiple nozzles.
  3. Is your liquid pressurized by either a pump or pressure-pot to get it to feed to the nozzle? If so what is the liquid pressure? EXAIR manufactures nozzles for pressurized applications as well as for applications where it is desirable or necessary to suck the fluid up into the nozzle with our siphon feed type atomizing nozzles.
  4. What is the viscosity of the fluid that you want to apply in the application? What we are concerned about here is the thickness of the fluid to be applied to make sure the nozzle will work well with that material. If the viscosity is under 300 Centipoise, an internal mix type nozzle works well. If it is over 300 Centipoise, then the more independently controlled, external mix type nozzles will be better to use.
  5. How much liquid do you want to apply to your target area in an hour’s time? Notice we want to know what the flow rate would be on an hour basis. For example gallons per hour or liters per hour. If the application rate is going to be given in gallons or liters per minute, these flow rates would be too high to be able to use an EXAIR Atomizing Nozzle appropriately.

With your answers to these five simple questions, an Application Engineer can help to recommend the right Atomizing Nozzle for your application. Give us a call or write to us about your spraying application today. We will be glad to help you sort through the data to come up with the right recommendation for you.

Neal Raker, Application Engineer
nealraker@exair.com