CB/T601-1992 Self closing drain valve  

    A Self Closing Drain Valve, including valve body, valve disc and valve stem, Bronze Self-closing Water Drain Valve is characterized in that the valve disc is installed on the lower side of the valve port in the valve body, the lower end of the valve stem is installed on the valve disc, and the upper part of the valve stem Protruding from the valve body, the upper part of the valve stem is equipped with a spring, the upper end of the Bronze Self-closing Drain Valve valve stem is equipped with a lifting lug, the lifting lug is equipped with a rear hand rod, the middle of the handle rod is equipped with a lower support rod, and the lower end of the support rod is fixed on the valve. On the body, the handle bar and the support bar are connected to the lifting lugs. The utility model solves the problem that the screw-controlled butterfly valve has a slow opening and closing speed and cannot self-close.