Thread Number: 33331  /  Tag: 80s/90s Vacuum Cleaners
Hoover Type K HEPA Bag Creation
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Post# 363700   12/16/2016 at 10:42 (2,659 days old) by wyaple (Pickerington, OH)        

wyaple's profile picture
My goal was to have all my machines using paper bags upgraded to HEPA bags. Not really a problem, except one holdout. A 1988 Hoover Spirit using a type K bag. I couldn't find any manufactured HEPA bags for it, so I decided to make one (okay, so maybe two...).

Step 1: Find a suitable HEPA bag. My first attempt was modifying a Riccar 8000 series bag collar and the results were OK, but I new a could do better. I found that the Perfect HEPA C bag was a better candidate than the Riccar bag because it was shorter. You'll see in pic #1, the Perfect bag collar peels off very easily.

Step 2: Create a tight fitting cardboard collar. This wasn't too difficult and in pics 2 through 4, the test fits went well.

Step 3: Attach collar to bag. While there are surely better adhesives than what I used, I did find that common rubber cement did work well. I'm told by my wife that something called "modpodge" will probably work better. See pics 6 and 7 for completed examples.

Step 4: Actually use the bag in the Spirit and hope you discover no leaks. Test bag for airflow performance. Pics 8 and 9 show that my "frankenbag" inflates well and I was able to measure a higher airflow when compared to the factory paper K bag.

Without any bags, I measured 76 CFM from the hose end. With the newly created HEPA bag, the CFM dropped to 71. A clean paper bag was 69 CFM, so I know I'll have not only more airflow to start, but when the bag gets full, I won't lose nearly so much.

Bill


  Photos...       <              >      Photo 1 of 9         View Full Size
Post# 363736 , Reply# 1   12/17/2016 at 04:16 (2,658 days old) by fantomfan57 (Central Texas)        
Inovative!

I like this kind of post. Often I have been confronted with issues while restoring a vacuum. Sometimes I figure out a fix quickly but most of the time it is a matter of a couple of days before I finally figure out a solution. Of course that is thinking about it off and on during that time.

I have not attempted to internally reseal Electrolux woven hoses yet as I need to clean and dry them all beforehand. I will wait till late spring for that.



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