OZB butterfly valves are designed as single or double flange types and are supplied with patented o-ring channel and seal for maximum impermeability.

Single flange butterfly valves are designed for use with flexible bellows and similar connections.

Double flange butterfly valves have the same upper and lower flanges and are designed to be used in systems that have fixed connection with each other.

The maximum working pressure is 0.2 bars and the maximum working temperature is designated at 120°C.