Problems at the pneumatic valve production site
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Dear experts, the original pneumatic valve operated in the fail-open mode; now we want to change it to fail-close mode. How can this be achieved?
Double-acting changes the air path, single-acting changes the valve element state.
If it is a pneumatic diaphragm control valve, the manufacturer should be contacted for modification; it generally cannot be modified on-site.
The double-acting type cannot be changed; for single-acting linear actuators, it’s usually sufficient to turn the actuator around, and for angular actuators, changing the direction of the turbine will do – we have done all of these before.
Bro, you must be wrong; the single-acting type can’t be modified, but the others can be changed.
For double-acting types, FC\FO is not required; single-acting types are sufficient
Change the pneumatic valve from air-close to air-close; some valves can be adjusted via the valve seat, and if that doesn’t work, replace them or have the manufacturer make the adjustment.
Double-acting types have FC/FO options, and this can be achieved by adding a gas storage tank. Double-acting types don’t have the concept of forward or reverse action. Single-acting linear actuators have FO/FC options, so it’s not possible to make changes to them; to change the position of the spring, the valve stem must either become shorter or longer. In the case of angular actuators, changes are possible.
Double-acting types have FC/FO options, and this can be achieved by adding a gas storage tank. Double-acting types don’t have the concept of forward or reverse action. Single-acting linear actuators have FO/FC options, so it’s not possible to make changes to them; to change the position of the spring, the valve stem must either become shorter or longer. In the case of angular actuators, changes are possible.
After removing the actuator, just rotate the valve body 180°