The compact non-standard flange boasts multiple advantages:

Standard non-standard flanges not only save space and reduce weight, but more importantly, they ensure there is no leakage at the joint. The reduced size of the compact flange is due to the decreased diameter of the sealing component, which will decrease the cross-sectional area of the sealing surface.

2. Gaskets have been replaced by sealing rings to ensure a proper match between the sealing faces. In this manner, the lid can be tightly compressed with minimal pressure. As the required pressure decreases, the size and quantity of bolts needed can be correspondingly reduced.