Originally designed to handle the severe service applications seen on offshore platforms, the Master Flo PDA double-acting pneumatic piston actuator has a proven performance track record. The actuator is environmentally sealed to reduce many of the corrosion effects common to the industry, and features a design with no exposed linkages.

The double-acting piston operates on a minimum of 80 psi pneumatic supply providing a rigid control system for higher pressure choke valves. The internal spring provides fail-closed operation features upon loss of pneumatic or electrical signal, and PDAs are available with single, double and triple-spring configurations.