FIELD: diving technology. SUBSTANCE: device has body with one air pipe union, elbow and nipple with union nut for connection with air pipe union of diver s helmet. Air passage of body is provided with pneumatic valve. Body consists of two halves; nipple and elbow are secured on one of them; second half is provided with external thread for connecting air supply hose; pneumatic valve is mounted in second half. Elbow is provided with nozzle whose free end has external thread for connecting emergency air supply hose. EFFECT: compactness of structure; enhanced safety; ease in maintenance. 2 cl, 3 dwg
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