42 CFR 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:
(2) Air supply valve, orifice, or demand or pressure-demand regulator;
(3) Hand operated or motor driven air blower;
(4) Air supply hose;
(5) Detachable couplings;
(6) Flexible breathing tube; and
(7) Respirator harness.
(b) The component parts of each supplied-air respirator shall meet the minimum construction requirements set forth in subpart G of this part.