Tag: Butterfly Valve

Control Valves

Control Valves

The opening or closing of automatic control valves is usually done by electrical, hydraulic or pneumatic actuators. Normally with a modulating valve, which can be set to any position between fully open and fully closed, valve positioners are used to…

Control Valves

The opening or closing of automatic control valves is usually done by electrical, hydraulic or pneumatic actuators. Normally with a modulating valve, which can be set to any position between fully open and fully closed, valve positioners are used to…

Valve Symbols

Valve Symbols

A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, but are usually discussed as a separate…

Valve Symbols

A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, but are usually discussed as a separate…

Butterfly valve (ARI)

Butterfly valve (ARI)

A butterfly valve comes from a family of valves called quarter turn valves. In operation, the valve is fully open or closed when the disc is turned a quarter turn. The “butterfly” is a metal disc that is mounted on…

Butterfly valves (ARI)

The valve that is best suited for high pressure systems is the triple offset butterfly valve. With this valve, the contact axis of the disc seat is offset, which practically rules out sliding contact between the disc and seat. In…