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- since 1996 -

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Technical Discussions
Peter
Consultant, ASNT MT/PT Level 3, Quality Manager
SharingNDT, USA, Joined Jan 2017, 80

Peter

Consultant, ASNT MT/PT Level 3, Quality Manager
SharingNDT,
USA,
Joined Jan 2017
80
23:35 Sep-19-2019
Spraying non-aqueous developer from bulk, not aerosol

Reaching out for help, does anybody spray non-aqueous developer in bulk form?

This would have to be done with a paint sprayer and I need help understanding the equipment, technique, and settings behind it. 99.99% of non-aqueous users spray non-aqueous developer from aerosols that are designed to give an even-dusty-cloud like spray and not come out heavy or as a stream.

Imagine buying a 5 or 55 gallon pail of the liquid and deciding you would rather spray this form instead of using aerosols.

Thanks!

 
 Reply 
 
fabien CORMIER
Sales, FLUXO RANGE Manager
SREM TECHNOLOGIES, France, Joined Jun 2015, 12

fabien CORMIER

Sales, FLUXO RANGE Manager
SREM TECHNOLOGIES,
France,
Joined Jun 2015
12
12:31 Sep-23-2019
Re: Spraying non-aqueous developer from bulk, not aerosol
In Reply to Peter at 23:35 Sep-19-2019 (Opening).

Hello,

Yes we offer for example our developer FLUXO R175 in 10L drum. and many customers use this developer in drums ...

In order to spray the developer, you must use a spraying equipment like paint sprayer. but this equipment must be compatible with a flammable product and the developer must be agitated ... you can use a paint sprayer with a small bucket in order to agitate manually the developer inside the bucket during the utilization.

 
 Reply 
 
Keith Cain
Keith Cain
09:28 Sep-25-2019
Re: Spraying non-aqueous developer from bulk, not aerosol
In Reply to Peter at 23:35 Sep-19-2019 (Opening).

Hi Pieter


I have found that an electric spray gun with its own detachable bottle works the best, especially when working on large castings.

The bulk developer container must first be thoroughly shaken to loosen all of the developer powder within the solvent. After pouring some of the developer into the spraygun bottle, it needs to be stirred again before securing it to the gun. The nozzle of the gun needs to be adjusted so that a fine spray is emitted when activated. If the spraygun is not used continuously with its current filling, the contents must be stirred everytime prior to use. This is the same for the bulk container.

When using the spray gun, always be aware as to where the nozzle is when changing position or moving, as large drops can occur which tend to fall on the test surface and form a too thick a layer of developer.

Proper cleaning of the spraygun internal parts at the end of the day is important - this will extend the life of the gun. Penetrant cleaner/remover or acetone will usually work.

Don't forget to wear the applicable PPE as excessive contact with the solvent liquid and vapours could ruin your day.

Greetings from South Africa.

 
 Reply 
 
Michel Couture
NDT Inspector,
consultant, Canada, Joined Sep 2006, 897

Michel Couture

NDT Inspector,
consultant,
Canada,
Joined Sep 2006
897
02:54 Sep-27-2019
Re: Spraying non-aqueous developer from bulk, not aerosol
In Reply to Peter at 23:35 Sep-19-2019 (Opening).

Peter,

I have used non-aqueous bulk developer in the past and I think it is one of the bet way to go in a manufacturing set-up. Mixed with the appropriate solvent, it apply easily and very a economical. One thing you have to take into consideration is to follow the manufacturer's instruction to mix the developer. The bulk and the aerosol do not behave the same way during the application. The bulk will show a wet application which will dry in a very short time, but what is important, is to apply it in a uniform coat.

 
 Reply 
 

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