The TGA model is a double-action pneumatic
actuator perfect for on/off control of the various
types of butterfly valves. With an optional
positioner, it can also be used for flow rate control.
It mainly used for the medium to large-sized valves
of size 350mm or more. The operation principle is
that air pressure forces the piston inside the
cylinder into a linear reciprocating motion, causing
the trunnion coupled to the rod to drive the arm
and rotate the output shaft.