FLOW CONTROL DEVICE WITH FLOW ADJUSTMENT MECHANISM

摘要

A valve actuator (10) includes a stroke adjustment mechanism. An example includes a piston (16) disposed in an actuator housing (14) and having a range of motion or stroke between a first position (Pl) and a second position (P2) . An adjustment mechanism (12) defines a limit position (PL) of the piston, between the first and second positions. The adjustment mechanism includes a limit setting component (18) and an adjustment component (20) . The limit setting component is positioned to set an initial limit position (PLl) to limit the range of motion of the piston to between the initial limit position (PLl) and the second position (P2) . The adjustment component (20) is moved to adjust the limit position (PL) to a position between the initial limit position (PLl) and the second position (P2) to adjust the range of motion of the piston.