YD200B series ball valve mainly be used on-off application.
Blowout-proof stem with flanged stem inserted inside of body. So that the stem never blow out even it is subject to
abnormally high pressure or packing bolt becomes loose.
If the ball seat is burnt down, secondary metal seat prevents excessive leakage and ensures fire safe.
The life of improved PTFE seat is longer than pure PTFE, while, PPL can also be adopted in the seat mat's.
Temperature can bear 300 centigrade.