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    Default positive pressure air respirator

    After being frustrated from wearing a respirator for literally hours, and still inhaling dust and paint through ill fitting masks, I made a fresh-air, positive-pressure respirator. The positive-pressure ensures that any leaks blows air out and doesn't allow fumes in.

    I started with a new high quality paint mask capable of filtering dust, organic vapor, paint and pesticides. I converted the mask to positive-pressure by covering the filter cartridges with two rubber plumbing caps that have band clamps. I installed 1/4" barb fittings in each cap.

    I then filter the air from my air compressor through an homemade air dryer and two particulate filters and plumb the mask into the air line with a standard quick connect fitting.

    I made an air dryer by passing the compressed air through a copper coil of tubing, that is submerged in ice water. The air then flows into an air/water separator. The ice bath is effective in condensing the water in the air, thus allowing the air/water separator to function. Most air/water separators only remove liquid water. They are not effective in removing water vapor. The result is cool dry air to spray and breathe.
    Hope it helps.






    Last edited by Calpyro; September 3rd, 2007 at 06:17 PM. Reason: error
    M715 W/W, M37

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