In the field of valves, cold expansion ball valve is a top-mounted ball valve with a thermal expansion and contraction compensation structure, including a valve body, a valve ball, a valve seat and a valve cover. This new OEM ball valve is characterized in that: the valve seat is a single-end beveled valve seat, an expansion and contraction compensation structure including a spring. And a wedge-shaped engagement ring is arranged between the end and the valve orifice in the mechanical ball valve body. The spring is sleeved on the guide post-fixed outside the long wall of the wedge-shaped joint ring, and the free end of the spring extends into the blind hole on the valve cover. As a professional bronze ball valve supplier, we try to solve the technical problem that the industrial ball valve will not be stuck due to too high working temperature and leaking due to too low working temperature cold water expansion valve leaking. Contact us now for more info about the brass ball valve price!