Draeger Panorama Nova® SCBA to GOST 8762-75 (KR40H4) Adapter

thingiverse

Human: Draeger/Dräger Panorama Nova to GOST 8762-75 Adapter Design\r\n=============================================================\r\nThis prototype design for a Draeger Panorama Nova to GOST 8762-75, Russian gas mask thread adapter, was originally requested by diggerusha. The goal is to enhance cross compatibility of commercial off the shelf (COTS) filters with other manufacturer's respirators during this global PPE shortage. This particular instance involves creating an adapter for self-contained breathing apparatuses used by some overseas fire departments, making them compatible with any GOST 8762-75 threaded canisters or step down adapters to other respirator manufacturer filter cartridges.\r\n\r\nIf you or your fire department cannot source GOST threaded filters, a GOST to 40MM NATO (RD40x1/7") thread adapter is available:\r\nhttps://www.thingiverse.com/thing:4321450\r\n\r\nTo minimize the stack up of adapters, use the 40MM NATO version of the Draeger Panorama Nova here:\r\nhttps://www.thingiverse.com/thing:4321450\r\n\r\nPart Description:\r\n==============\r\nDRAEGER_PANORMA_NOVA_TO_GOST_ADAPTER_GEN1.STL\r\nInitial model release.\r\n\r\nDisclaimers/Risks:\r\n==============\r\n1.) Use Proper Gaskets \r\nRequires 40 mm OD gasket or o-ring on the interior pocket for GOST 8762-75 threads.\r\n\r\nRequires a ~33-34 mm OD o-ring on the back end of the adapter at the circumferential pocket to ensure proper seal against female side of mask.\r\n\r\nMay require an inhalation gasket. Since I do not have a Dräger Panorama Nova mask, I'm unsure if there is an inhalation gasket present. For negative pressure use, know that your exhale may foul the back side of the filter cartridge.\r\n\r\n2.) Perform Proper Negative Pressure Test\r\nFollow 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 a 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.\r\n\r\n3.) Use At Own Risk – Temporarily Solution Only Until Supply Chain Normalizes\r\n3D 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.\r\n\r\nDev. Notes:\r\n=========\r\n04/27/2020 - Initial model release. In work, pending support 3D printing community for any fitment and model revisions.\r\n\r\nCredits:\r\n======\r\nThanks to diggerusha for taking the time to pull the critical dimensions for which made the adapter possible.