A new reducing valve for aircraft high‐pressure missile gas systems, where a high outlet controlled pressure is necessary, has been developed by The Hymatic Engineering Co. Ltd., Redditch, Wores. Known as type PAS 322, the valve has been designed as part of an integral system and the associated valves with it include relief, solenoid and manually‐operated stop valves. The PAS 322 has outlet pressures of 1,000 to 3,000 Ib./sq. in. which can be controlled at any pre‐set figure with flows up to 15 cu. ft./min. of free air. It has an inlet pressure of up to 6,000 lb./sq. in.