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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
F16K39/00—Devices for relieving the pressure on the sealing faces
F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
F16K39/024—Devices for relieving the pressure on the sealing faces for lift valves using an auxiliary valve on the main valve
Dispositif de chasse d'eau à double bouton de commande permettant de délivrer par actionnement de chaque commande un volume de chasse prédéterminé.