1. When medium passes through the valve, the pressure in valve body may possibly push the stem out, or when the valve in repair, if there is pressure in the middle cavity, the stem or medium seems to easily fly out upon disassembling the valve, which can cause injuries to human beings. To prevent these possibilities, a dummy club is placed at the lower part of the stem. In this way, even if there is fire, packing and thrust bearing are burned or packing is damaged due to other causes, the pressure of medium in valve body will make the dummy club of valve stem in close contact with the upper seal face of valve body, thus to prevent medium leaking out from the damaged packing position;
4. ZECO motorized ball valve can choose forged body or cast body, ZECO is very strict in the control of raw materials, no matter what material material can fully meet the requirements of international standards and chemical analysis.
