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May 2013

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Subject:
From:
Ed Popielarski <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Ed Popielarski <[log in to unmask]>
Date:
Fri, 17 May 2013 20:14:31 +0000
Content-Type:
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text/plain (206 lines)
Phil,

Could one do this with differential pressure gage(s)?

Ed Popielarski
Engineering Manager


                               970 NE 21st Ct.
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                              Ph: 360-675-1322
                              Fx: 206-624-0965
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Nutting, Phil
Sent: Friday, May 17, 2013 1:06 PM
To: [log in to unmask]
Subject: Re: [TN] Water soluble masks compatible with closed-loop water treatment systems

Steve,

With our closed loop system I found that I needed to add a fine mesh filter on the Carbon bed inlet because it was not lasting long enough due to clogging from crap (dust, leads, solder, solder mask) off the boards.  Clean the replaceable mesh regularly and I doubled by carbon bed life.  I also added a flow meter on the outlet to flag the operators when the flow was dropping due to the crap in the mesh.

Phil

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Friday, May 17, 2013 3:22 PM
To: [log in to unmask]
Subject: Re: [TN] Water soluble masks compatible with closed-loop water treatment systems

Hi Lloyd,

 

Yeah it does, but things get a little more complicated when you have a closed-loop cleaner.

 

TechSpray  claims that their Wondermask WSOL 2004 is safe on ion beds & filters in closed-loop cleaning systems:

 

http://www.techspray.com/product-info.php?pId=66&cId=22

 

I called them to ask specifically what happens to the mask in a closed-loop system, does it get filtered out in the carbon bed? Or does it require some sort of pre-filter?

I was told that it would not be harmful to the ion beds, but I might start seeing my water starting to turn pink from the red dye in the mask. I was assured: "but it's not harmful..."

 

Well, that concerns me. I tend to agree with what Brian said in his
reply:

 

>>Good evening, all!

 

>>I personally would be very skeptical, indeed, of ANY w/s mask in a
closed loop system. It is asking for 

>>reduced lifetime of carbon and/or DI columns.

 

>>I would suggest open loop pre-cleaning and use the closed loop just to
polish off. Alternatively,

>>a membrane micro-filter before the first column, but this will require
frequent backwash de-clogging.

 

>>Brian

 

I did find something that was written on one of Separation Technologists web pages of a water soluble mask that they offer that is not harmful in closed-loop systems:

 

http://www.separationtech.com/temporary_water.php

 

I called and talked with John Russo, and the first question he asked me was how much was my usage? I couldn't answer him. But he said that anything water soluble will affect

your beds in a closed-loop system. He said that he feels that his material will affect the beds less than others. He's sending me a sample to check out.

 

I'm beginning to think that if I want to protect my DI beds and the water in a closed-loop system, I will have to think about kapton tape and dots, or peelable masking...which I

know that my production manager won't be too excited about.

 

Just wondering if anybody has ever used any of the water soluble masks in a closed-loop system that claim to be "safe"?

 

Steve Gregory

 

From: lduso - Diamond-MT.com [mailto:[log in to unmask]]
Sent: Friday, May 17, 2013 10:39 AM
To: Steve Gregory
Subject: Re: [TN] Water soluble masks compatible with closed-loop water treatment systems

 

Ahhhh, now that it works great for!!




Lloyd Duso

Diamond-MT
Plant Manager
(814) 535-3505

www.Diamond-mt.com

 

On Fri, May 17, 2013 at 10:28 AM, Steve Gregory <[log in to unmask]>
wrote:

Hi Lloyd,

I'm sorry I didn't make it clear. I'm referring to water soluble masks before wave solder, not conformal coating....

Steve Gregory

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of lduso - Diamond-MT.com
Sent: Friday, May 17, 2013 7:25 AM
To: [log in to unmask]
Subject: Re: [TN] Water soluble masks compatible with closed-loop water treatment systems

Tough to put into practice. With masking you want to get the masking material off before the coating has completely cured to minimize lifting and peeling. The washing machine could damage that uncured coating. Plus the coating is covering the masking so the water will not touch the masking to dissolve it until the coating is removed from it first. I tried it with parylene and we had to pick holes in the film so the water could access the masking then go back and trim off the excess after the masking dissolved and we were left with a "tent" of film

Re-usable boots are ideal but could be costly when you have many different style/sizes of connectors.

Like we tell all our customers, cheapest way to coat something is leave off all the connectors!!

Lloyd Duso
Diamond-MT
Plant Manager
(814) 535-3505
www.Diamond-mt.com


On Fri, May 17, 2013 at 9:08 AM, Steve Gregory < [log in to unmask]> wrote:

> Morning all,
>
> Continuing on with the masking thread, I know Techspray has a water 
> soluble mask that is supposed to be compatible with closed-loop water 
> treatment systems, are there any others out there?
>
> Any pros/cons of using them?
>
> As always, thanks in advance!
>
> Steve
>
> ______________________________________________________________________
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