Section 84.131 - Supplied-air respirators; required components(a) Each supplied-air respirator described in § 84.130 shall, where its design requires, contain the following component parts: (1) Facepiece, hood, or helmet;(2) Air supply valve, orifice, or demand or pressure-demand regulator;(3) Hand operated or motor driven air blower;(5) Detachable couplings;(6) Flexible breathing tube; and(b) The component parts of each supplied-air respirator shall meet the minimum construction requirements set forth in subpart G of this part.