Resolution 2014-73 - Laserfiche WebLink

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The cylinder threads shall be straight with an O -ring or quad -ring gasket type seal. The cylinder valve shall be a "fail open" type, constructed of forged aluminum and designed such that no stem packing or packing gland nuts are required. It shall contain an upper and lower seat such that the pressure will seal the stem on the upperseat, thus preventing leakage past the stem. No adjustment shall be necessary during the life of the valve. If the SCBA is equipped with a CGA cylinder connection, the cylinder valve outlet shall be a modification of the Compressed Gas Association (CGA) standard threaded connection number CGA 347 for 5500 systems. Each cylinder valve shall consist of the following: 1) a hand activated valve mechanism with a spring - loaded, positive action, ratchet type safety lock and lock -out release for selecting "lock open service" or "non -lock open service"; 2) an upstream connected frangible disc safety relief device; 3) a dual reading pressure gauge indicating cylinder pressure at all times; 4) an elastomeric bumper; 5) an angled outlet. Each cylinder and valve assembly shall be equipped with a hanger bracket for positive locking attachment of the assembly to the backframe. The SCBA shall maintain all NIOSH and NFPA standards with any of the following types of cylinders listed as provided by the SCBA manufacturer. Carbon - Wrapped The cylinder shall be manufactured in accordance with DOT specifications and meet the Transport Canada requirements with working pressures of 5500 psig. The cylinder shall be lightweight, composite type cylinder consisting of an aluminum alloy inner shell, with a total overwrap of carbon fiber, fiberglass and an epoxy resin. The cylinder shall be available in 75- minute duration based on the NIOSH breathing rate of 40 liters per minute (lpm). CONFIRM EXCEPTION 12