40MM NATO (RD40X1/7) to Delta Plus M6000 Jupiter Series Filter Adapter

thingiverse

40MM NATO (RD40X1/7) to Delta Plus M6000 Jupiter Series Filter Adapter ========================================================== This prototype design for a 40 MM NATO, gas mask thread, to legacy Delta Plus M6000 Jupiter series filter adapter makes any RD40x1/7 threaded full face CBRN masks compatible with Delta Plus line of Jupiter series chemical, combination, and particle filter cartridges. This adapter helps mitigate PPE shortages by expanding greater cross compatibility of respirators and filters to other manufacturer models. Part Description: ============== 40MM_TO_DELTA_PLUS_M6000_ADAPTER_GEN1.stl Single piece construction adapter for Delta Plus M3000 Mars series filters that does not require clocking, so I did not design a two piece version that is backwards compatible with the 40MM to 3M outer shell, unless otherwise requested for greater modularity. Disclaimers/Risks: =============== 1.) Use Proper Gaskets Requires gasket/o-ring on the interior side to ensure proper seal between cartridge and bayonet. Source a gasket or O-ring with a nominal diameter of 32 mm or ~1.26". 2.) Perform Proper Negative Pressure Test Follow SSPs established by your institution or workplace for further guidance. But in general, don your 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. (Typically, most full face or half face respirators have two filters, so cover those intake ports with your hands. If you're running only one filter, ensure the opposite port has filter cap in place.) 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. 3D printing this adapter is only a temporarily ad-hoc solution against biological contagions. In addition to using a properly calibrated 3D printer, due to tolerances of adapters, if possible perform hot nozzle pass on all exterior surfaces, to reduce surface porosity. It's highly recommended that users apply a thin layer of polyurethane clear coat on all exterior surfaces, spray or dip based methods, to help resiliency and durability for repeated sterilization and to reduce fomite transmission in printed infill layers. Once supply chains return to normal, users should purchase OEM OSHA/NIOSH/EN standard approved respirators, adapters and accessories for their institution and workplaces. Dev. Notes: ============ 04/24/2020 - Initial model release. I do not have any Delta Plus series respirators or filters to check measurements, so please report back in comments for any fitment issues and I'll release revisions as required. Credits: ====== Thanks to f2knpw for his Delta Plus mask end caps and filter adapters. I extrapolated what the bayonet geometry was based on female interface and scaling from pictures. https://www.thingiverse.com/thing:4297891