Sealing principle of globe valve: Part 4

4. Radial seal: Radial seal refers to the sealing of the plunger type globe valve, and its sealing principle is that in the plunger valve, its disc and valve seat are designed according to the principle of the plunger. The valve disc is designed as a plunger, the valve seat is designed as a sleeve, the material of the sleeve can use flexible graphite or PTFE, and the valve seat is composed of an upper sleeve ring, an isolation ring and a lower sleeve ring, and is pressed with the valve cover. Sealing is achieved by a tight fit between the plunger and collar.

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