The MSD-III Diaphragm Actuator is a high-performance pneumatic actuator designed for precision control in severe service applications. Its multi-spring design ensures reliable fail-open or fail-close functionality, while a rugged one-piece cast yoke and nylon-reinforced diaphragm provide exceptional durability. Available in direct-acting (DA) and reverse-acting (RA) configurations, it delivers fast response, excellent linearity, and long operational life. The minimised air chamber volume improves response times, and multiple sizes support a wide range of applications. An optional manual override enhances operational flexibility, making it a dependable solution for demanding industrial environments.

Key features

Multi-spring pneumatic actuator

DA and RA configurations

Strong cast yoke

Reinforced diaphragm

Compact air chamber

Stroke sizes: 20mm to 130mm

Operating pressure: 4.2–5.0 kgf/cm²

Temperature range: -29°C to 80°C (-45°C/-55°C options)

Top or side handwheel manual override option

Precision in severe service applications