A ball valve is a type of quarter-turn valve that controls flow through it using a hollow, perforated, rotating ball called a "floating ball." When the ball's hole is parallel to the flow, the valve is open; when the valve handle pivots the ball 90 degrees, the valve is closed.
It is simple to visually confirm the status of the valve because the handle sits flat in line with the flow when it is open and perpendicular to it when it is closed.
MS Lined Ball Valve is dependable, operating well even after numerous cycles, and lengthy periods of inactivity. They are frequently preferred to gates and globe valves for shutdown applications because of these characteristics, although they lack the precision control needed for throttling applications.
Ball valves open quickly and provide a tight shutdown. A ball valve produces little turbulence or flow resistance when it is fully open.
A ball with an aperture rotates under the control of the valve stem. Abrasive wear to the ball will result in leakage when the valve is closed, hence the ball opening should never be utilized to throttle flow. It can be set to either a completely open or fully closed position.
Ball valve basics
Due to its low pressure drop and relatively high flow capacity, ball valves are regarded as high recovery valves.
Due to the ball valve's simplicity of use, reparability, and adaptability, it is widely used in industry. Depending on the design and material choices, it can withstand pressures of up to 1000 bar and temperatures of up to 752°F (500°C).
often come in sizes from 0.2 and 48 inches (0.5 cm to 121 cm). Floating balls are frequently chrome plated for durability; valve bodies are constructed of metal, plastic, or metal with a ceramic.
Advantages:
Low price
• Large flow rate
• High temperature and pressure capabilities
• Minimal maintenance and leaks
• Low-torque sealing that is tight
• Most operators prefer simple quarter turn action.
• Relatively simple to automate.
Disadvantages:
• Restrictions on throttle characteristics
• Cavitation prone
• The voids around the ball and seats make it unsuitable for applications involving slurries. Slurries have a propensity to harden or clog inside the cavities, significantly increasing the operating torque of the valve and occasionally making it inoperable.
Applications:
• Ball valves perform admirably in chemical applications, even the most demanding ones (e.g. dry chlorine, hydrofluoric acid, oxygen).
• The range of standard sizes is 1/2" to 12".
• High performance ball valves can resist up to 2250 psi thanks to flange ratings that are in compliance with ASME, such as 150, 300, 600, 900, or occasionally higher classes.
• The maximum working temperature, which mostly depends on the seats and seals, may reach 550°F.
• Because standard valves adhere to ASME face-to-face measurements, replacing and retrofitting a ball valve is simple.
Comments