This series ball valve is a manually regulated shut-off valve, which is applicable to two-direction flows. It is used in freezers, refrigerators, and air conditioning units. The valve seat is tightly sealed with top sealing performance and it is a through-type ball valve with maximum flow rate & a wide operating temperature range. The ball valve is equipped with a secondary sealing cap, and the metal wire can be used to avoid losing the sealing cap, and in general to avoid any mistakes in maintenance.