Pneumatic True-Union Ball Valves

Pneumatic true-union ball valves combine a plastic true-union ball valve body with an AT series pneumatic quarter-turn actuator for automated shut-off, diversion, and switching service in corrosive fluid piping systems.

The true-union body design allows the valve to be removed from the pipeline by loosening the union nuts, without cutting the pipe or dismantling the complete piping layout. This makes inspection, cleaning, seal replacement, and valve maintenance more convenient in chemical treatment systems and non-metallic piping installations.

UPVC, CPVC, PPH, and PVDF body material options are available to suit different chemical compatibility requirements. Compared with metal valves, plastic valve construction provides better resistance to many compatible acids, alkalis, salts, and corrosive chemical solutions. EPDM and PTFE seat options can be selected according to the process medium, temperature, and sealing requirements.

The valve is available in 2-way and 3-way body styles. The 2-way version is used for automated open-close service, while 3-way versions can be supplied with L-port or T-port ball configurations for flow diversion, mixing, and pipeline switching applications. Socket and threaded end connections are available for different plastic piping systems.

Single-acting and double-acting pneumatic actuator options are available. The single-acting actuator uses air to open and spring return when the air supply is interrupted, while the double-acting actuator uses compressed air for both opening and closing. Pneumatic accessories such as solenoid valves, limit switch boxes, pneumatic positioners, FRL units, and pneumatic handwheels can be supplied according to the required control method.

Pneumatic true-union ball valves are commonly used in chemical dosing systems, water and wastewater treatment, electroplating lines, fume-scrubbing systems, chemical storage and transfer systems, and automated plastic piping installations.