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 ?
The stainless steel ball valves of the GEMU 790 series are designed to enable quick and easy servicing of internal wearing parts at all times.
Prophylactic reoperation after mitral valve replacement with the Starr-Edwards ball valve: a report of four cases.
Gate valves end ball valves are available in PVC and CPVC.
Most ball valve manufacturers offer 316-L corrosive-resistant stainless steel as standard (most poppet and gate valves are constructed from 304 SS), some offer brass, and one will offer aluminum construction in the near future.
In addition, Conbraco wanted to be viewed as a good neighbor to the Pageland community that works in the foundry and in the Apollo Ball Valve assembly and machining plant.
Lavatory Drain Ball Valve Assemblies: P/Ns 2651-278-13, -14, -17, -25
(4) have reported 16.6 % survival rate in patients with aortic S-E ball valves after 30 years.
A vacuum ball valve consists of a sealed ball that has a large-bore hole through its center to provide unobstructed straight-through conductance when the valve stem is turned 90 degrees.
All Clark Solutions 8P Series ball valve actuators feature a compact twin rack and pinion design and an adjustable 0-90[degrees] rotation.
VICTAULIC, the world's leading manufacturer of mechanical pipe-joining systems, has introduced the series 727 ball valve, a high-pressure, enhanced port, Nace-compliant valve with grooved ends for upstream oil applications.
Asahi/America, Inc., involved in thermoplastic valve technology, has introduced the PE100 ball valve, an innovative solution for gas, sewer and water applications where metal ball valves have typically been installed.
Units are available in several different 1/4 turn and unidirectional 1/4 turn models, and a 1/4 turn unidirectional model with integral True Union plastic ball valve. Several 1/4 turn models are designed for use with True Union and three-way ball valves from 1/2" - 2" and three-way ball valves and butterfly valves up to 4"; other models are suitable for use with all three-way ball and butterfly valves up to 24"; one model is ideal for on/off and modulating use with all ball and butterfly valves up to 12".