F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
F16K15/00—Check valves
F16K15/14—Check valves with flexible valve members
A—HUMAN NECESSITIES
A62—LIFE-SAVING; FIRE-FIGHTING
A62C—FIRE-FIGHTING
A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
Regulateur de pression comprenant une gorge d'etancheite limitee axialement par une bague situee entre le carter de soupape et le manchon de reception