We generally recommend profile gaskets for best results in tightness between pipe and valve. The centering is done by placed screw holes. Due to the double-o-ring-profile there is a higher loading pressure with the same fastening torque than with traditional gaskets, even in case of plane flange faces.
To ease the actuation of the different valves when you have difficult installation situations, we also offer adapted stem elongations.
The standard valve stays in its position and is adjusted.