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screen printing => Equipment => Topic started by: Logoman on September 25, 2015, 08:25:29 PM

Title: National Exposure unit Vacum
Post by: Logoman on September 25, 2015, 08:25:29 PM

I have an old National Exposure unit but the Blanket won't vacuum down completely. I am thinking I need a Gasket that is one piece to go completely around so that no air could leak out. Any ideas on this?

Title: Re: National Exposure unit Vacum
Post by: abchung on September 26, 2015, 08:28:13 AM

we built our own exposure unit. We used the car door rubber seal. Works great for us.

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Title: Re: National Exposure unit Vacum
Post by: sben763 on September 30, 2015, 08:50:16 AM

Quote from: Logoman on September 25, 2015, 08:25:29 PM

I have an old National Exposure unit but the Blanket won't vacuum down completely. I am thinking I need a Gasket that is one piece to go completely around so that no air could leak out. Any ideas on this?

Go to the home store get closed cell weather stripping 3/8"-1/2". I have the same unit and put 2 strips on the glass. One will contact with the lid the other just the blanket. I could only get 9-10 hg.  Now I am getting 17-20hg.

Title: Re: National Exposure unit Vacum
Post by: 3Deep on September 30, 2015, 11:20:39 AM

Just order you some new gasket rubber, the stuff you can get at lowes or Home depot is not thick enough just a bandaid, you might try a auto parts store.

Title: Re: National Exposure unit Vacum
Post by: sben763 on October 03, 2015, 06:06:50 PM

These units don't use a rubber gasket.  The actually depend on the blanket to the glass. So it doesn't take much to create a better seal.