Ball valves are quarter-turn valves that regulate gas and fluid flow using a rotatable ball with a bore. They are also known as shut-off valves and can withstand temperatures up to 350°C and 700 bar pressures. Ball valves are durable, reliable, and high-pressure valves. They have a strong seal, are resistant to contaminated media, and provide a good seal despite unclean mediums. They are ideal for control and shut-off applications but lack the power of gate valves in throttling applications. They are best used with gases due to their robust seal and durability.