HEAT CHECK VALVE

摘要

The invention relates to household and industrial gas devices and can be used for protecting gas supply system in emergencies, for example for cutting off the gas supply when fire occurs. The inventive heat check valve comprises a body and a sprocket arranged therein and whose external rim is fixed to the body with the aid of a clamping ring and connected to a hub by spokes. Said hub is provided with the guide for a spring-loaded rod of a closing element. One spoke is provided with a longitudinal through channel in which a pressure screw is arranged on the side of the rim. A movable rod actuating a ball stopper which is arranged in the groove of the rod and fixing said rod in open position is also arranged in said channel. A fuse embodied in the form of thermostable bulb is disposed between the pressure screw and the movable ro. The walls of the spoke are provided with holes disposed in the area of the location of said thermostatic bulb in a vertical position with respect to the axis of the bulb. Said invention makes it possible to increase the actuation reliability of the heat check valve by increasing the actuating stability of the valve with respect to the temperature and to reduce hydraulic resistance of the through channel.