Normally 8-point fastening. 8mm thick neck/compensating ring. The Manlid ASSY lined with rubber (IIR, CIIR, BIIR) after welding. The thickness of rubber is 4-6mm. This device used for hydrochloric acid, sodium hypochlorite and so on.
Fastening Points: 2bar/4points、3bar/6points、4bar/8 points
Seal supplied separately according to chemical medium.