Metso Series VD are Pneumatic Linear, Spring Diaphragm actuators Excellent accuracy and reliabiliy is achieved through the use of multiple springs and rolling diaphragm in the actuator.

The use of involtue rolling diaphragm permits the long travel and excellent linearity without the need of expensive hardware normally associated with diaphragm actuators. The rugged one piece yoke, pressed steel diaphragm case and special nylon reinforced diaphragm provide dependable, high trust performance.