Evil Respirator LPR Seat Seal

These are often deteriorated from age and exposure to moisture. The originals are installed without any adhesive, and these will snap into place just like the original. They can be flipped in a pinch, but I recommend simply replacing it if it becomes damaged or worn. This is Part Number 81 in the Evil Pimp Manual, which can be found here: https://drive.google.com/file/d/1BOxA6pwzk7HwNVInC59WkiGnN-n7B6_N/view?usp=sharing

It's important to note that this manual has an error. Part Number 79 is mistakenly listed as an 010/70 BUNA o-ring. Using this size in this location will result in reg creep. I have disassembled several NOS Evil Respirator LPRs and found that this part is actually an 009/70 BUNA. This is the captured o-ring that seals against the tip of the "poppet shaft", which I commonly refer to as the reg piston. I have included a picture to indicate the incorrect part. Please note that this o-ring is not included when purchasing this part; this is simply a public service announcement for those rebuilding their Respirator LPRs.

Also of note, when rebuilding the Respirator LPR, there is an old trick recommended to release the air pressure that results from reinstalling the poppet (hereafter referred to as the piston). PBN folks recommended cutting a small, thin strip of a plastic bag, laying it inside the regulator body, then sliding the piston into place with the plastic bag strip between the piston o-ring (number 76) and regulator body. This served to release trapped air between the piston and the reg body. The plastic strip must then be removed. This creates a vacuum whenever the regulator piston moves back, which was the intention of the engineer. It results in extremely fast movement of the piston, resulting in better consistency. I've found that a better method than the plastic bag strip is to simply wiggle the piston as you reinstall it. This will release the trapped air just fine; no plastic bag sacrifice necessary!

Regardless of any recommendations listed here, I am not liable for damages to your regulator for any reason.