Non-refilled steel gas cylinder valve

The invention relates to a machine part, in particular to a non-refilled steel gas cylinder valve, which can be widely used in the petroleum industry, chemical engineering industry, medical industry, machinery industry, environmental protection industry, food industry and the like. The non-refilled steel gas cylinder valve comprises a valve body, wherein a valve rod is arranged inside an air cavity of the valve body; a connecting mechanism is arranged on the inner diameter of one end of the valve body and connected with a base; a gas filling opening is formed in the base; another connecting mechanisms are arranged on the outer diameters of the two ends of the valve body; a first sealing ring and a second sealing ring are respectively arranged at the two ends of a bonnet on the valve rod; a liming mechanism is arranged at the end, extending out of the valve body, of the valve rod; a filling-prevention shutdown mechanism is arranged at the end, near the limiting mechanism, of the valve rod in the valve body. The non-refilled steel gas cylinder valve disclosed by the invention overcomes the defect of the existing refilled steel gas cylinder valve, ensures that the steel gas cylinder cannot be refilled automatically after the gas fed in the steel gas cylinder is used up, effectively avoids the potential accidents caused by mistaken filling or mixed filling of the gas, facilitates safety management of the steel cylinder filling in use, and practically guarantees the safety of lives and property of the public and the national property.