STRUCTURE AND METHOD FOR ANTI-BLOW OUT STEM FITTING OF BALL VALVE

摘要

The present invention relates to an unexpected separation preventing structure of a ball valve stem and a method for installing the same. In a conventional way, a stem is coupled to a ball inside a chamber inside a valve body and a valve main body is assembled after the stem is coupled to the valve body while a separation preventing ring is installed in the stem, so there is a problem that workability is decreased to reduce productivity and the entire valve body has to be disassembled during assembly and maintenance of the stem. To resolve the problem, the present invention enables the stem to be simply inserted to be coupled to an upper portion after the valve main body is assembled, and the separation preventing ring is inserted to be installed into a stem body and installed to be supported by a stem cover to maintain a separation preventing function or improve performance and provide convenience of an assembly process and maintenance to improve productivity.