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Structural Features
1. Switch Indication of Hand operated Float Ball Vale
As the moving parts of valve, ball, valve stem and handle are an assembly unit. The head of valve stem is shaped a diploid, thus to easily distinguish whether valve is in the 'ON' position or 'OFF' position from handle position. When handle or stem diploid is in parallel with the pipe axis, valve is in 'ON' position; When handle or stem diploid is vertical to the pipe axis, valve is in 'OFF' position.
2. Valve Locking de-ice
To present misoperation, the fully opened or closed position of valve can be locked up, especially when calves are mounted outdoors or when calves are not allowed to be opened or closed by technical process. To present misoperation by other persons, it seems very important to have valve position locked up. Thereby lockhole locating ab is designed if requested by users to meet the technological requirements of users.
3. Anti-flyout Structure of Vale Stem
When medium passes through the valve, the pressure in valve body may possibly push the stem out, or when the valve is 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 burnt 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. Antistatic device
When operating the salve, the friction between the Gall and the nonmetal seat, like PTFE or etc. Will produce electrostatic charge that can be accumulated on the ball. To present static spark, an antistatic device is placed on the valve to derive the electric charge accumulated on the Gall from the static channel between the ball and the stem, or between the stem and valve body.
Jacket Ball Valve
