The sealing pair of the conical plug valve can be adjusted by forcing the plug body deeper into the valve seat. When the plug body is in close contact with the valve body, the plug body can still rotate, or it can be lifted from the valve seat and rotated 90° before rotating, and then pressed into the seal. Conical plug valves can be divided into tight-fitting conical plug valves, stuffing conical plug valves, oil-sealed conical plug valves, sleeve conical plug valves, pressure-balanced inverted conical plug valves, three-way or four-way conical plug valves, etc.
a. Tight-fitting conical plug valve
b. Stuffing conical plug valve
c. Oil-sealed conical plug valve
d. Sleeve conical plug valve
e. Pressure-balanced inverted conical plug valve
f. Three-way or four-way conical plug valve
g. High-temperature wear-resistant plug valve
