Honeywell Safety Sperian® /Survivair™ ValuAir® Respirator (Bayonet) to 40MM NATO (RD40x1/7) Adapter

thingiverse

Honeywell Safety Sperian / Survivair ValuAir Respirator (Bayonet) to 40MM NATO (RD40x1/7) Adapter This design is a prototype for a legacy Honeywell Safety Sperian / Survivair ValuAir bayonet non-disposable respirator adapter to 40MM NATO (RD40x1/7") gas mask thread. The goal is to achieve cross-compatibility with commercial off-the-shelf (COTS) filters from other manufacturers during the global PPE shortage. This adapter allows Honeywell Safety Sperian / Survivair ValuAir bayonet series respirators to be used with RD40x1/7" threaded canisters or step-down adapters to other respirator manufacturer filter cartridges. If you cannot source 40MM NATO (RD40x1/7") thread filters, consider using the following adapters: * 40 MM NATO to 3M Filter Adapter + https://www.thingiverse.com/thing:4245358 * 40MM NATO to Scott 742 Series Filter Adapter + https://www.thingiverse.com/thing:4347531 * 40 MM NATO to MSA Bayonet Filter Adapter + https://www.thingiverse.com/thing:4265715 * 40MM NATO to MSA Comfo Classic Filter Adapter + https://www.thingiverse.com/thing:4267676 * 40MM NATO to Honeywell/Honeywell North Filter Adapter + https://www.thingiverse.com/thing:4268775 * 40MM NATO to Honeywell Sperian Filter Adapter + https://www.thingiverse.com/thing:4342343 * 40MM NATO to Milla EURMASK ETNA (Bayonet) Series Filter Adapter + https://www.thingiverse.com/thing:4342320 If no filter cartridges are still available, consider using DIY filter solutions on Thingiverse that are compatible with each major manufacturer's respirators. Part Description: HONEYWELL_SPERIAN_VALUAIR_TO_40MM_NATO_ADAPTER_GEN1.stl Initial model release. Disclaimers/Risks: 1. Use Proper Gaskets: Requires 40 mm OD gasket or o-ring on the interior pocket for RD40x1/7 threads. 2. Perform Proper Negative Pressure Test: * Follow SSPs established by your institution or workplace for further guidance. * Put on respirator, adjust straps till taught against face, ensuring no obstructions around the periphery of the seal against face either due from hair, facial hair, or otherwise. * Exhale deeply. Cover all inhalation ports. * Now inhale deeply. The mask should suck tightly against your face without any air leakages. Re-test if adjustments are required at gasket/o-ring interfaces at the adapter. 3. Use At Own Risk – Temporarily Solution Only Until Supply Chain Normalizes: * 3D printing materials are not resistant to many solvents, are water soluble, and degrade when exposed to chemicals, heat, and UV/sunlight. * This adapter is only a temporarily ad-hoc solution against biological contagions. * Consider applying a thin layer of polyurethane clear coat on all exterior surfaces to help resiliency and durability for repeated sterilization. Dev. Notes: 05/07/2020 - Initial model release. In work, pending 3D printing community support for any fitment and model revisions. Credits: Thanks to NoSiGnAl-H3 for the Honeywell Valuair adapter to TentaCat0702 MK2 design. Used images and his ID/OD and depth dimensions to extrapolate the filter side attachment geometry. https://www.thingiverse.com/thing:4334272