PAPR adapter: Adflo/Versaflo to Honeywell/North by paulschonfeld

Last crawled date: 4 years, 1 month ago

This adapter connects the hose from a 3M Adflo (welding) or Versaflo powered air purifying respirator (PAPR) into input air port of the Honeywell/NORTH Primair Universal Bibbed Hood Assembly
Airgas Part #:HONPA111
V1 has a looser fitting lock ring to Honeywell input.
V2 lock ring tabs create more a snug fit with Honeywell connection. Chamfers added to underside print orientation to avoid stringing when printing. (optimized for FFF)
V3 is optimized for resin 3D printing: increased clearance between parts to prevent unintentional fusing. (Use V2 for FFF printing)
The inner tube connector uses a ~32mm OD o-ring gasket (!25mm ID) to seal the connection, available at most auto parts and hardware stores. Mine was from O-Reilly, o-ring item number 214 (link below and shown in pics).
I printed with 0.28mm layer height (for fast print) on Ender 3 printer without supports.
Fusion 360 project viewer and download link: https://a360.co/3apHt9p
214 National Nitrile O-ring from O'Reilly Auto parts: https://www.oreillyauto.com/detail/b/national-o-rings-4439/hardware---fasteners-16585/o-rings-25101/o-ring---sae-17539/f3cefbd937b6/national-o-ring/214/4535490
DISCLAIMER: This is not an approved medical device and has not been rigorously tested. Further testing may be needed. Use this at your own risk and discretion, in accordance with FDA policy. See this document for COVID-19 guidance: "Enforcement Policy for Face Masks and Respirators During the Coronavirus Disease (COVID-19) Public Health Emergency Guidance for Industry and Food and Drug Administration Staff":https://www.fda.gov/media/136449/download?fbclid=IwAR3KWWq1zpwgq_K4XTj86ZYbYIduxV8sVxRJH0CXRCcj0kvDUPR2vb6Qk0o