Pneumatic Actuated Trunnion-Mounted Ball Valve

Nominal Diameter: DN200‑DN600 (8″‑24″)
Nominal Pressure: PN16‑PN64 (Class 150‑300)
Actuation Type: Pneumatic
Available Accessories: Solenoid Valve, Limit Switch, Pressure Reducing Valve
Body Materials: WCB, WC6, WC9, 304, 316L, HC, Alloy 20, 2205, 2507, 904L, 310S, TA2, etc.
Design & Manufacturing Standards: ANSI B16.34, GB/T 12237, DIN 3357, API 608, etc.
Flange Standards: ASME B16.5, JIS B2220, EN 1092‑1, HG/T 20592, etc.
Operating Temperature: -29°C ~ 425°C
Applicable Media: Water, steam, oil products, crude oil, refined oil, natural gas, LPG, coal gas, compressed air, nitric acid, acetic acid, urea, various acid‑alkali media, hydrogen‑sulfide‑containing media, etc.

Product details

Pneumatic Trunnion‑Mounted Ball Valve is a high‑performance ball valve driven by a pneumatic actuator. It mainly consists of a trunnion‑mounted ball, valve body, valve stem, valve seat and pneumatic actuator.

Different from floating ball valves, the ball of trunnion‑mounted ball valve is secured inside the valve body via upper and lower stems or bearing assemblies. The ball will not shift significantly under medium pressure, which makes it especially suitable for working conditions of large size, high pressure, high temperature and high pressure differential.

Working Principle of Pneumatic Trunnion‑Mounted Ball Valve:
The pneumatic actuator receives compressed air supply and converts air pressure into 0‑90° quarter‑turn rotary output, which drives the trunnion‑mounted ball to rotate via upper and lower valve stems. The ball remains radially fixed without displacement under medium pressure, and changes the flow path status and flow area through rotation.

When fitted with a solenoid valve, it controls air supply direction switching to realize fast full‑open and full‑close of the valve for pipeline shut‑off and circulation.

Product Specifications

Pneumatic Shut‑off Ball Valve are 0‑90° rotary valves. They utilize pneumatic actuators to convert compressed air into rotary motion, delivering fast and reliable valve opening and closing for industrial process control.
According to specific application requirements, pneumatic ball valves can be equipped with solenoid valves, limit switches, position feedback devices, air filter‑regulators, valve positioners and other pneumatic instrument accessories to realize automatic valve control and remote monitoring functions.
Many factors shall be considered when selecting a pneumatic ball valve, including valve size, pressure rating, operating temperature, process medium, flow rate, body material, seat material, actuator type and control mode.
If you are looking for a qualified manufacturer or supplier of pneumatic ball valves, please contact our technical team and provide your operating conditions. Our valve engineers will recommend suitable pneumatic ball valves, actuators and control accessories based on your specific application requirements. （Unit: mm）