Ball Valve

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ball valve

[′bȯl ‚valv]
(mechanical engineering)
A valve in which the fluid flow is regulated by a ball moving relative to a spherical socket as a result of fluid pressure and the weight of the ball.

Ball Valve

 

a valve in which the seal is effected by a ball. The spherical surface of the ball is pressed against a conical seat that forms the transmission path of a pipe, thus providing a hermetic seal in the channel. Globular check valves—a type of ball valve—are very common. The ball in such valves is pressed against the seat by the action of a spring or by the ball’s own weight (in the latter case, the seat axis is vertical); the mechanism allows a gas or liquid to flow only in one direction when the pressure of the flow overcomes the force created by the spring or weight of the ball. Globular check valves with solid metal balls are used for inside diameters up to 15 mm; similar valves with hollow, rubber-coated balls are used for inside diameters up to 100 mm. Valves with balls that have a through hole are used as shut-off and regulating devices for inside diameters up to 1,000 mm. Such valves are opened and closed by rotation of the ball through 90°.

ball valve

ball valve
A valve for regulating the flow of fluids by a movable ball which fits in a spherical seat.
References in periodicals archive ?
High-pressure ball valves also help decrease the problems of fugitive emissions.
The GEMU 790 ball valve series stands out thanks to its compact yet robust design.
The welded ball valves will be mainly used in a project relating to 2*100 MW back pressure heating transmission unit.
The new six-way control ball valves from Siemens have a built-in pressure compensation function which is active when the valve is in the closed position (ie when no heating or cooling is needed).
Actuation: Single and Double Acting Actuators, Double Acting Actuated Ball Valve Assemblies, Single Acting Actuated Ball Valve Assemblies
The new plant for ball valves manufacturing is expected to be built and to start operating in full capacity in six years.
The latest addition to Castell Iso-lok's range of ball valve lockouts has been designed for use with ball valves of up to 1" in diameter, ensuring maintenance shut downs can be implemented to the highest possible standard of personnel safety.
The plastic valves available are gate valves, universal line valves, straight supply valves, angle supply valves, washer hose valves, angle valves, sill cocks and ball valves.
recently introduced three new lines of hydraulic couplings and a range of ball valves, all of which target mobile hydraulic applications.
Parker Series 500 Stainless-Steel Ball Valves are engineered for use in demanding applications where corrosion resistance is vital.
New valve designs have provided ball valves that work well from 10-7 torr to 6.8 positive atmospheres, about 100 psig, while maintaining a leak rate of less than 1 x [10.sup.-9] Std/cc He sec.