Aviall Product Catalog And Source Book Page 1463 Environmental & Oxygen

AVOX SYSTEMS OXYGEN EQUIPMENT aviall ability aviall.com 1463 CONTINOUS FLOW CONTROL REGULATORS Continuous flow control regulators - pneumatic and electro-pneumatic. These pneumatic and electro-pneumatic regulators form a part of the passenger emergency oxygen system when installed on a pressurized cabin aircraft. When the cabin pressure drops below a predetermined setting, the system automatically initiates and controls the flow of oxygen to the passenger mask compartment. At any altitude, the system may be activated manually at the pneumatic regulator and/or electrically through the electro-pneumatic regulator. The electro-pneumatic regulator is available with a built-in pressure transducer for monitoring the oxygen supply pressure with an output in the 0 to 5 VDC range. It also has an installed pressure switch indicating the regulator "on" mode. Outstanding Features: First-stage and outlet pressure relief valves. All configurations of the FCU are equipped with a relief valve that will vent to atmosphere should the first-stage or outlet pressure exceed the maximum allowable working pressure. Accurately reduces pressure and controls flow of high pressure (1,850 to 300 psi) oxygen. Choice of automatic, electrical, and manual operation. Compact, altitude-compensated system. Available with or without the surge feature. The surge feature allows a high initial volume flow of oxygen to fill the oxygen distribution lines that serve the passenger mask compartments. After the initial surge of oxygen has filled the distribution lines, operation of the unit returns to normal. Operation When an oxygen cylinder pressure range from 1,850 to 300 psi (12.76 to 2.07 MPa) is applied to the inlet of the unit, a first-stage pressure reducer regulates it to a relatively constant value of approximately 100 psi (0.69 MPa). This controlled first-stage pressure is routed to the actuation valve and to the pilot-operated main flow control valve. Automatic actuation. At a typical altitude range of 13,250 to 15,000 feet, the actuation valve inside the FCU opens and automatically activates the regulator. Manual actuation. The system may be activated manually at any altitude by raising the manual actuation/reset lever on the pneumatic control regulator. Raising the manual actuation/reset lever overrides the automatic mechanism. Note: For continuous operation at altitudes below the automatic actuation range, the lever must be held in the actuated condition. Electric actuation. The system may be actuated electrically at any altitude by momentarily energizing the solenoid switch in the cockpit of the aircraft. Actuation of the solenoid within the electro-pneumatic control regulator depresses a detent, causing opening of the actuation valve, overriding the automatic mechanism. Manual reset. (Cabin pressure must typically be below 12,000 feet [3,658 m] altitude.) After actuation (automatic or electrical), the system is reset by depressing the manual actuation/reset lever on the pneumatic control regulator or the manual reset lever on the electro-pneumatic control regulator. The automatic actuation, manual actuation, and electrical actuation capabilities are retained after resetting. Electric reset. (Cabin pressure must typically be below 12,000 feet [3,658 m].) After actuation, the system is reset by momentarily energizing the solenoid switch in the cockpit of the aircraft. Energizing the solenoid releases the actuation detent, and allows the system to shut down. The actuation and surge capabilities of the unit are retained after resetting. 22504 and 22505 Series 22504 and 22505 Series continuous flow control regulators. Boeing Actuation Pressure Part No. Part No. Altitude Transducer Description 22504-07 BAC 10-60511-3 13,250-14,500 ft. Yes Electro-pneumatic 22504-09 BAC 10-60511-4 13,250-14,500 ft. No Electro-pneumatic 22504-11 BAC 10-60511-5 14,000-15,000 ft. Yes Electro-pneumatic 22505-07 BAC 10-60510-3 13,250-14,500 ft. No Pneumatic/manual 22505-09 BAC 10-60510-4 14,000-15,000 ft. No Pneumatic/manual Altitude/Flow Data Altitude Ground 14,000 ft. (4,267 m) 20,000 ft. (6,096 m) 30,000 ft. (9,144 m) 40,000 ft. (12,192 m) Regulated Pressure 2.25-5.25 PSIG 10.9-14.0 PSIA 17.6-20.6 PSIA 38.7-41.9 PSIA 52.7-56.7 PSIA Maximum Regulated Flow (NTPD) 230 lpm 430 lpm 770 lpm 1,000 lpm

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