Honeywell Sperian® to 40MM NATO (RD40x1/7) Adapter

thingiverse

Human: Honeywell Sperian to 40MM NATO (RD40x1/7) Adapter==========================================This prototype design for a legacy Honeywell Sperian respirator to 40MM NATO (RD40x1/7/DIN) gas mask thread adapter was created to help cross compatibility of commercial off the shelf (COTS) filters with other manufacturer’s respirators, during this PPE shortage. The adapter should be compatible with any RD40x1/7 filter canisters. If you do not have access to 40MM (RD40x1/7) filters, you can use the following adapters to step down to COTS filter cartridges from these companies below: 40 MM NATO to 3M Filter Adapterhttps://www.thingiverse.com/thing:4245358 40MM NATO to Scott Series Filter Adapterhttps://www.thingiverse.com/thing:4347531 40 MM NATO to MSA Bayonet Filter Adapterhttps://www.thingiverse.com/thing:4265715 40MM NATO to MSA Comfo Classic Filter Adapterhttps://www.thingiverse.com/thing:4267676 40MM NATO to Honeywell/Honeywell North Filter Adapterhttps://www.thingiverse.com/thing:4268775 40MM NATO to Honeywell Sperian Filter Adapterhttps://www.thingiverse.com/thing:4297348 40MM NATO to Honeywell Safety Sperian /Survivair ValuAir Bayonet Filter Adapterhttps://www.thingiverse.com/thing:4345345 40MM NATO to AOSafety Threaded Filter Adapterhttps://www.thingiverse.com/thing:4273365 40 MM NATO to AOSafety R5700 8051 Bayonet Filter Adapterhttps://www.thingiverse.com/thing:4273377 Alternatively, if you cannot source COTS filters, search thingiverse, there are a number of other DIY filter cartridge designs to mate to other major manufacturer, 3M/MSA/etc. respirator's attachment system. Part Description:HONEYWELL_SPERIAN_TO_40MM_NATO_ADAPTER_GEN1.stlSized female threads based on male threads provided from midnightsmith in his Sperian to 3M adapter, clearance for threads 0.16 mm.https://www.thingiverse.com/thing:4263683 Disclaimers/Risks: 1.) Use Proper GasketsRequires 40 mm OD gasket or o-ring on the interior RD40x1/7 pocket and 30 mm OD gasket or O-ring on Sperian ~M30X1.8 pocket to ensure proper seal maintained between cartridge and threads. 2.) Perform Proper Negative Pressure TestFollow 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 your 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. Highly recommended 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:04/21/2020 - Initial model release. In work, pending 3D printing community support for any fitment and model revisions.Credits:Thanks to midnightsmith publishing his 3M version of this legacy Sperian respirator filter adapter.