Product Overview
The ball opens or closes the passage through quarter-turn movement. Pneumatic drive provides the normal powered operation, while the manual mechanism allows local operation in the conditions specified for that assembly. Its engagement and isolation procedure must follow the supplied instructions; a manual device is not a substitute for a defined failure response.
Selection and Ordering Notes
- Specify the medium, design pressure, operating temperature, size and mating flange details.
- Identify the required pneumatic duty, available air supply, command and feedback interfaces.
- Confirm manual-device type, access space and the procedure for returning to pneumatic operation.
- Request the selected seat, seal and wetted-material specification and the installation drawing.
Related information: Browse ball-valve configurations | Valve technical guidance | About Trekre.
Frequently Asked Questions
Can I operate this pneumatic valve locally by hand?
The confirmed configuration includes a manual operating mechanism. Obtain its model-specific engagement, isolation and return-to-service instructions; do not assume the manual device can be used while the actuator is pressurized.
Does the manual mechanism make the valve fail open or fail closed?
No failure position should be inferred from the presence of manual operation. Specify the required response to air or control-signal loss and request confirmation for the selected pneumatic package.
What installation space should I allow around the manual device?
Provide the available clearance for the hand-operated mechanism and pneumatic actuator. Ask for the complete assembly drawing, not only the valve face-to-face dimension.