Depending on the type of valve positioner

If the input signal is the standard 20 to lOOkPa pressure signal, can be equipped with pneumatic valve positioner; if the input signal is a standard 4 ~ 20mA current signal, can be equipped with electric valve positioner.
Can add special self-locking device to secure his position in the gas source interrupt.pneumatic accessory
Can be added to the hand wheel, to achieve the downgrading operation in automatic operation when a fault occurs, i.e. manually.
Displacement conversion device can be added to the linear displacement into angular displacement, some piston actuator landscape installation and direct conversion of the linear displacement of the angular displacement displacement conversion device.pilot valves
Long actuators to adapt to long stroke (up to 400mm), the push torque applications designed for the executive body, it can be the input signal is directly converted to angular displacement, so no external displacement conversion device.