SAFETY VALVE FOR WATER HEAT SUPPLY SYSTEM Russian patent published in 2007 - IPC F16K17/168 

FIELD: valving systems.

SUBSTANCE: safety valve comprises housing made of a sleeve provided with the cylindrical side. The bottom of the sleeve is provided with the seat. The housing receives the valving member made of a flexible material and mounted on the rod. The rod is mounted inside the housing for permitting axial movement with respect to it by means of a threaded connection. The seat is conical and interacts with the valving member. The valving member is made of a truncated cone provided with the cylindrical collar from the side of the grater base. The collar is flush mounted with respect to the cylindrical bearing rod and thrust flange. The thrust flange is provided with the cylindrical shank that is fit on the rod with interference. The ring passage is provided from the side of the valving member between the rod and housing. The passage is connected with the axial dummy opening made in the rod through the radial opening made in the side of the rod. The openings connect the ring passage with the ambient fluid. The end of the rod projecting out of the housing is provided with a cylindrical flywheel for forced opening of the valve. The outer side of the housing is provided with a thread for mounting and fastening of the safety valve, e.g. to the battery heat exchanger of the heat water supply system. The housing receives the arrester of the axial movements of the rod when the valve is forcedly opened from the end projecting out of the housing. The arrester is made of a ring mounted in the ring groove of the housing.

EFFECT: enhanced reliability and safety.

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