Design and Material Considerations of Ball Valves

Ball valves are commonly used for controlling the flow of fluids in industrial and commercial piping systems. The tight shut-off characteristic of these valves makes them especially suited for flow control applications in high pressure and high-temperature conditions. They are generally utilized in catalytic reforming, refining, power, marine, petrochemical, and process industries.

Design engineers creating valves for demanding applications should match the operation of the valve’s component elements together with the necessary flow, temperature, and pressure requirements. Carefully designed high pressure and high-temperature ball valves can maintain temperatures as high as 400°F and elevated pressures up to 10,000 psi.

Ball Design

Port size and the position where the ball is held at the valve body are two important elements of ball design. The hole diameter of a ball valve is known as its port size. Reduced, regular, and complete are some frequent port sizes for ball valves. Common chunk materials include brass, stainless steel, bronze, aluminum, and cast iron.

Full Port Design

The vent size of a complete port ball valve is roughly like the pipeline’s inner diameter. These layouts are best suited to applications that warrant minimal resistance to flow of fluids. If you want to know more about Size, shape and prices of ball valve click on http://www.nssteel.co.th/ .

Regular Port Design

When compared with complete port layouts, the hole diameter of frequent port ball valves is little and exhibits increased resistance to fluid flow. They can be utilized as options to gate valves in a number of industrial fluid flow control software.

Reduced Port Design

The hole diameter of a reduced port ball valve is roughly equal to 60 percent of the valve’s inner diameter. This ball valve design is appropriate to small, end-loaded valves which require small-diameter balls.

A ball valve’s flow control world element can be constructed to the ball casing in two ways: the trunnion-mounted ball layout as well as the floating-ball design.

The Floating-Ball Style

Two seat rings are utilized to support the ball at a floating-ball design. In floating-ball layout, the flow control shaft is connected to the ball in a slotted right angle to the ball valve’s port. This arrangement makes the ball to float or move in the direction of the seat ring on top, once the shaft is rotated.

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