- Circular flange assembly ready for bolting straight onto weld pad/nozzle flange
- Glass discs separated by spacer ring and independant seals
- If damage occurs to one disc, the other maintains service under full operating conditions.
- Nominal sizes: DN 50 to DN 200
- Viewing diameter: 50 to 175 mm
- Materials: stainless, carbon steels and specials
- Also available with inter glass heating