Overview
The Top Entry Ball Valve closes tightly with only 90 degrees of rotation and small torque. The perfectly equal inner cavity provides a low resistance, straight flow path for the medium. It is larger in size and made of better materials than the typical household valve. The surface is painted for a good finish. Top Entry Ball Valves are suitable for conveying gases such as air, vacuum, liquids such as water, organic solvents and liquids containing suspended particles.
http://www.fluid-valvestech.com/ball-valve/