3M BE-10L PAPR Hose Adapter

prusaprinters

<p>Amid the COVID-19 crisis, healthcare workers around the globe are running out of PPE, leaving themselves at risk of contracting coronavirus. Working with a local hospital, I've designed an adapter that allows them to use their older 3M BE-10L PAPR (Powered Air-Purifying Respirator) hoods with their newer 3M VersaFlo PAPR respirators. Unlike N95 masks, PAPR units are reusable and give their users complete protection from airborne liquids and particulates. Many hospitals in the United States may have these and other similar systems stockpiled from the 2014 Ebola epidemic and with this design, may be able to reuse them to protect doctors and nurses. As usual, please make sure to reach out and ask before taking any action.</p> <p>As with the official Prusa face shield design, if you plan on producing these adapters for any care center, follow their safety guidelines that I've pasted below:</p> <hr/> <p>PLEASE READ THIS CAREFULLY</p> <p>-Act as if you were infected by the COVID-19 virus. Wear a face mask and a fresh pair of gloves when collecting each batch of printed parts. Store the parts immediately in a sealable bag.<br/> -Talk with whoever you’re making the shields for, let them know about your manufacturing environment<br/> -There is still debate about how long the virus survives on plastic, but most sources mention 2-3 days. That means that by letting the packed face shields sit for 2-3 days before distributing them, you’ll greatly reduce risk of transmission<br/> -Do not store the entire stock in one place, minimize the risk of cross contamination</p> <hr/> <p>To sterilize these parts, please reference the following link: <a href="https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457">https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457</a></p> <hr/> <p>Lastly, if there is some part of this design that you would like to improve or modify to fit other needs, I have attached the .step files needed for you to do so. However, under no circumstances do I want this design commercialized. A reimbursement fund may be used but this design was designed for humanitarian use, free-of-charge, and I intend for it to stay that way.</p> <h3>Print instructions</h3><p>It is strongly recommended that the structural components are printed in PETG. They have the ideal mechanical properties and chemical resistance needed for this design. If you plan on using PLA, please notify whatever care center you are manufacturing these parts for so that they can take proper precautions when sterilizing the parts. Furthermore, there are some print settings that need to be accounted for:</p> <p>Layer height: 0.20mm<br/> -NOTE: Adaptive layer heights is required to ensure that the threads on the top piece are printed correctly. They're fairly fine and will otherwise string and gum up during assembly. Please set the layer heights for this section to the lowest possible value.</p> <p>Perimeters: Minimum 3 shells<br/> -NOTE: 3 shells is required to make the adapter airtight. Another option is to print with 100% infill but that may dramatically increase print times.</p> <p>Materials: PETG (suggested) and TPU for the gaskets<br/> -NOTE: It is suggested that you use the smooth PEI sheet to keep the hood and adapter airtight.</p>