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8 <br /> <br />i. The facepiece shall contain inhalation valves that are readily visible to enable quick <br />visual inspection. <br />j. The lens shall be a single, replaceable, modified cone configuration constructed of a <br />non-shatter type polycarbonate material. <br />k. In accordance with NIOSH 42 CFR part 84, the facepiece meets penetration and <br />impact requirements, including compliance with ANSI Z87.1 – 2010. <br />l. The lens shall have a coating to resist abrasion and chemical attack and meet the <br />requirements of NFPA-1981, for lens abrasion. <br />m. The lens shall have an internal anti-fog coating to reduce fogging of the lens. <br />n. Multi-directional voicemitters shall be mounted on both sides of the facepiece and <br />ducted directly to an integral silicone nosecup to enhance voice transmission. <br />o. The facepiece assembly shall be able to incorporate multiple Scott electronic <br />communications options (amplification, radio interface, wireless, etc.) without <br />affecting NIOSH approvals or NFPA/CBRN approvals where applicable. <br />p. The facepiece shall enable the installation of communications bracket on either the <br />right or left side. <br />q. The head harness shall be a five-point suspension made in the fashion of a net <br />hood to minimize interference between securing of the facepiece and the wearing of <br />head protection, and be constructed of a para-aramid material for fire, first <br />responder and CBRN applications. <br /> <br />B. Mask-Mounted Regulator: <br />a. The facepiece-mounted positive pressure-breathing regulator shall supply and <br />maintain air to the facepiece to satisfy the needs of the user at a pressure greater <br />than atmospheric by no more than 1.5 inches of water pressure static. <br />b. The breathing regulator shall maintain positive pressure during flows of up to 500 <br />standard liters per minute. <br />c. The regulator shall also meet or exceed a dynamic flow requirement of remaining <br />positive while supplying a minute volume of 160 liters. <br />d. The breathing regulator shall have attached a low pressure hose which shall be <br />threaded through the left shoulder strap to couple to the pressure reducing regulator <br />mounted on the backframe. <br />e. An optional regulator shall be available with a quick connect coupling in line for use <br />with the optional outlet manifold and accessory hose to allow the breathing regulator <br />to be disconnected from the unit and reconnected to the auxiliary hose of a second <br />unit in the event rescue is required. <br />f. The optional quick connect coupling shall be easily connected and disconnected by <br />trained individuals with a gloved hand and/or in low light conditions. <br />g. The optional quick connect coupling shall not allow the air hose to be connected <br />without the HUD Connection. <br />h. The optional coupling shall also be guarded against inadvertent disconnect during <br />use of the equipment. <br />i. The low-pressure hose shall be equipped with a swivel attachment at the facepiece <br />mounted regulator. <br />j. The regulator shall connect to the facepiece by way of a quarter (1/4) turn coupling. <br />k. The user shall hear an audible sound when the regulator is attached correctly to the <br />facepiece. <br />l. The regulator shall be equipped with a doughnut-shaped gasket which provides a <br />seal against the mating surface of the facepiece. <br />m. The regulator cover shall be fabricated of a flame resistant, high impact plastic. <br />n. The breathing regulator shall have a demand valve to deliver air to the user, <br />activated by a diaphragm responsive to respiration. <br />6.1.D. - Page 10