Bellow seal valves

Bellow valves feature a metal bellows, usually cylindrical in shape, to protect against stem leakage. Functioning like a vertical diaphragm, it seals with the valve stem and the valve body itself. This type of valve is used to minimize air pollution, losses in production, problems in the process and energy losses.

Description
FACTS BELLOW SEAL VALVES
Used in combination with heat transfer media, vacuum, highly hazardous or costly fluids