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
F16K21/00—Fluid-delivery valves, e.g. self-closing valves
F16K21/04—Self-closing valves, i.e. closing automatically after operation
Dispositif d'equipements d'appareils refrigerants permettant de maintenir en position ouverte lesdits appareils lors des operations de degivrage notamment, eliminant ainsi tous risques de fermeture accidentelle