SCBA

2026-11-03

3M Scott Air - Pak X3 Pro SCBA ( Built - to Specification on last page ) Self - Contained Breathing Apparatus Requirements The SCBA shall consist of the following major sub - assemblies : ( 1 ) a removable , positive pressure mask - mounted regulator with air - saver switch ; ( 2 ) an automatic dual path redundant pressure reducer ; ( 3 ) end - of - service time indicators ; ( 4 ) a harness and backframe assembly for supporting the equipment on the body of the wearer ; ( 5 ) a shoulder strap mounted , remote gauge indicating cylinder pressure ; ( 6 ) a rapid intervention crew / universal air connection ( RIC / UAC ); ( 7 ) a personal alert safety system ( PASS ); and ( 8 ) cylinder and valve assembly for storing breathing air under pressure . Regulatory Approvals The SCBA shall be approved to NIOSH 42 CFR , Part 84 as an open circuit , pressure - demand self - contained breathing apparatus . The SCBA shall be certified to NFPA 1981 , Standard on Open - Circuit Self - Contained Breathing Apparatus for Emergency Services , 2018 Edition . The SCBA shall be certified to NFPA 1982 , Standard on Personal Alert Safety Systems , 2018 Edition , when configured with a PASS device . All components shall be approved for Intrinsic Safety under UL 913 Class I , Groups C and D , Class II , Groups E , F and G , Hazardous locations . The SCBA shall maintain all NIOSH standards with any of the types of cylinders listed as provided by the SCBA manufacturer . Required Components Regulator – E - Z Flo + The mask - mounted regulator shall maintain positive pressure during flows of up to 500 standard liters per minute . The mask - mounted regulator shall incorporate an inline quick disconnect coupling . The quick disconnect coupling shall be easily connected and disconnected by trained individuals with a gloved hand and in limited visibility conditions . The quick disconnect coupling shall be guarded against inadvertent disconnection during use of the equipment . The low - pressure hose shall be equipped with a swivel attachment at the mask - mounted regulator . The mask - mounted regulator shall connect to the facepiece by way of a quarter ( 1 / 4 ) turn rotation . A latch mechanism shall lock the mask - mounted regulator in place to prevent inadvertent rotation . An audible click shall provide notification that the mask - mounted regulator is securely attached to the facepiece . The mask - mounted regulator shall be equipped with a gasket to provide a seal against the mating surface of the facepiece . The mask - mounted regulator shall contain an air - saver switch to prevent airflow when disconnected from the facepiece . The mask - mounted regulator shall reactivate and supply air only in the positive pressure mode when the wearer affects a face seal and inhales . The mask - mounted regulator shall have a demand valve to deliver air to the user , activated by a diaphragm responsive to respiration . The diaphragm shall include an integrated exhalation valve . The mask - mounted regulator shall include a purge valve for use as an emergency bypass . The mask - mounted regulator shall be designed to direct the incoming air through a spray bar and over the inner surface of the facepiece lens for defogging purposes . The mask - mounted regulator shall incorporate a Heads - Up Display ( HUD ) to provide visual alerts to the SCBA user of air status and PASS alarm conditions . The mask - mounted regulator shall incorporate a latch mechanism to enable removal from the facepiece . The mask - mounted regulator shall require pulling back of the thumb latch and a quarter ( 1 / 4 ) turn rotation for removal from the facepiece Pressure Reducer with CGA Cylinder Connection The pressure reducer shall be mounted at the waist on the backframe and be coupled to the cylinder valve through a short length of internally - armored , high - pressure hose with a hand coupling for engagement and sealing within the cylinder valve outlet . In lieu of a manual by - pass , the pressure reducer shall include a back - up pressure reducer connected in parallel with the primary pressure reducer and an automatic transfer valve for redundant control . The back - up pressure reducer shall also be the means of activating the low - pressure alarm devices in the mask - mounted regulator . The low - pressure alarm warning shall denote a switch from the primary pressure reducer to the back - up pressure reducer whether from a malfunction of the primary pressure reducer or from low cylinder supply pressure . A press - to - test valve shall be included to allow functional testing of the back - up pressure reducer . The pressure reducer shall have incorporated a resettable over - pressurization relief valve which shall prevent the attached low - pressure hose and mask - mounted regulator from being subjected to high pressure . End - of - Service Time Indicator ( EOSTI ) The SCBA shall have two end - of - service time indicators ( EOSTI ). One shall be both a tactile and audible alarm , and one shall be a Heads - Up Display ( HUD ). The primary EOSTI shall be the integral low - pressure alarm device that shall combine an audible alarm with simultaneous vibration of the facepiece . The primary EOSTI shall be located in the positive pressure mask - mounted regulator . This alarm device shall indicate either low cylinder pressure ( 35 % +/- 2 %) or a malfunction of the primary pressure reducer .

Kentucky

2026-05-08