Collection:Pneumatic 3-Way Brass Ball Valves

Explore Tameson's wide range of 3-way brass pneumatic ball valves from leading global manufacturers. These valves control the flow of media - liquids or gases - remotely, using a rotating ball with a bore. A pneumatic actuator connects to the valve and converts compressed air into mechanical motion, rotating the ball 90° (a quarter turn) to switch between flow paths. For larger valves, pneumatic actuation is often more cost-effective than electric actuation.

A 3-way pneumatic ball valve has three ports and a ball with a bore that controls how media flows between them. Two bore designs are available: L-port and T-port, named after the shape of the flow path inside the ball.

A T-port valve can mix media from two inlets into one outlet, or distribute one inlet to two outlets. An L-port valve redirects flow rather than mixing it. Because the actuator only rotates 90°, pneumatic L-port and T-port valves switch only between two positions. Because port connections differ between designs, always check the bore design to get the flow pattern you need.

Brass is a copper-zinc alloy known for its strength and resistance to contaminated media, making it a reliable, low-maintenance choice for most non-aggressive media like water, gas, oils, and compressed air. However, brass is not suitable for salt water or distilled water, as it can suffer from dezincification, a process that weakens the material over time.