"- A device that controls the flow of fluid, such as oil or chemical gas.
- Repeatedly loaded by high pressure and strong corrosion working fluid.
- It is often used at high temperatures and cryogenic temperatures, resulting in a Marson phenomenon on the contact surface.
- It is a cobalt-based alloy material with excellent heat resistance, corrosion resistance, and wear resistance, and the life of valve parts is extended by surface treatment with plasma transfer arc special welding process technology on the base material with poor material performance."