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These are metal seated high perfomance valves designed to work in a wide range of pressures and temperatures whilst still providing bidirectionally bubble–tight shut off.

These valves have low torque and low friction between the seat and the butterfly that increase valve lifetime.

They are Fire Safe valves and some models are suitable for cryogenic use.

Depending on the particular application for which it is to be used (pressure, temperature, fluid characteristics, ...), the sealing ring may be flexible, reinforced, reinforced with treatment (HT-65), Stellited or hardened.