Issues with globe valves (tapered seal)
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For globe valves (tapered seal), how is the cone angle of the valve disc determined? Are the taper of the valve core and the valve seat the same? If it’s different, what are the requirements? If anyone knows, please let me know. Thank you!
The conical sealing surface of the valve disc should maintain a taper that matches that of the valve seat, with the contact surface of the valve disc ideally located at the midpoint of the conical surface.
The taper of the valve core is the same as that of the valve seat; otherwise, there will be leakage
For specific angles, refer to the Practical Valve Design Manual
The cone angles of the valve core and the valve seat can be different, and the seal formed in this way is a linear seal. Under hard-sealing conditions, a level 6 seal can be achieved, resulting in zero leakage.