Specifications include, but are not limited to: 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. The HUD shall serve as the secondary EOSTI. The HUD shall be powered by the SCBA’s single power supply. The HUD shall be mounted in the user’s field of vision on the positive pressure mask-mounted regulator. The HUD shall display cylinder pressure in increments of 100%, 75%, 50% and 35% (+/- 2%). The display shall not have a numerical representation of cylinder pressure. At greater than three quarters cylinder pressure, two green Light Emitting Diodes (LED) shall be illuminated. Between three quarters and one-half cylinder pressure, one green LED shall be illuminated. Between one-half and 35% (+/- 2%) cylinder pressure, one “yellow” LED shall be illuminated and flash at a rate not less than one (1x) time per second. At 35% (+/- 2%) or less cylinder pressure, one “red” LED shall be illuminated and flash at a rate to exceed ten times (10x) per second. The HUD shall have a low battery indication that is distinct and distinguishable from the cylinder pressure indications.
