EXAIR PVDF Super Air Knife in a Harsh Environment

Sometimes at EXAIR, we are challenged with an aggressive environment, and in this application, we had a customer that manufactured tractor batteries.  He was concerned about the sulfuric acid leaving the filling station area, and he wondered if we could help him.  After the batteries would get filled with sulfuric acid, they would be capped and then conveyed to a wash system.  He wanted to remove any excess acid that may have been on the battery for safety reasons.

PVDF Super Air Knife
PVDF Super Air Knife

I recommended our PVDF Super Air Knives.  These Super Air Knives are made with Polyvinylidene Fluoride (PVDF) with Hastelloy® hardware and a PTFE shim.  These materials are very inert to acid and caustic solutions.   Also with its unique design, it is able to optimize the compressed air usage with a consistent, strong blowing force.  The customer purchased three pieces of a model 110012-PVDF.  He was able to keep the hazardous sulfuric acid contained in the filling station.  As a bonus, he was able to increase the life of his washing solution because less acid was entering into the wash station.  He was so impressed by the effectiveness of the PVDF Super Air Knives that he purchased three more pieces for after the washing system.  He was able to speed up the drying process for QC checks and packaging.

If you are faced with an extreme challenge, you can contact an Application Engineer at EXAIR to see if we may have a solution for you.

John Ball
Application Engineer
Email: johnball@exair.com
Twitter: @EXAIR_jb


Hastelloy is a registered trademark of Union Carbide and Carbon Corporation.

Where Would You Use a Large Stainless Steel Nozzle and Why?

This is a question that we are sometimes asked by clients who look at our complete Air Nozzle range and see that we have everything from the tiniest M4 nozzle up to some really large ones that fit a 1-1/4” steel pipe. So, what would you use model 1114SS for anyway?

I just so happen to have a perfect scenario for you as described below.

A recent customer inquired with me about some method to blow off large diameter electrode holders for a furnace application. For those of you who do not know, furnaces used to smelt aluminum, zinc, steel and other alloys tend to be very hot and dirty places.


Being as such, a lot of debris tends to collect on horizontal surfaces including those of the electrode holders themselves.

electrode holder

What happens is dirt and dust are building up on the top of the holder and when it is opened it is becoming trapped between the holder and electrode causing arcing to go on inside the holder. The environment the solution will need to work in runs about 1500 – 1600°F. The area immediately around these holders is even hotter. So any nozzle placed in that environment will need to be able to withstand that temperature.

The solution: (3) model 1114SS (1 NPT Stainless Steel Super Air Nozzles) are placed in a triangular configuration to blow all the debris off of the top surface of the holder and electrode prior to opening to completely eliminate the arcing problem that had been occurring.

The key to the solution was to have an effective force generating nozzle that could project maximum force at distances well over 2 meters from a target and do so in a very hot application.

So, now you have one very good idea of how and where the larger Stainless Steel Super Air Nozzles can be used.

Neal Raker, Application Engineer