Critical Technical Advantages
-
Modular and Safe Design: The G-Series features a modular architecture that separates the power and spring components. This design not only simplifies maintenance but also enhances safety during field service by containing spring tension. The modularity significantly reduces inventory costs by allowing shared components across different actuator sizes.
-
Rapid Fail-Safe Reversal: Flexibility is a core attribute of the G-Series. The interchangeable power and spring modules allow for the quick reversal of the fail-safe mode (from fail-open to fail-close) in the field without requiring a complete actuator replacement.
-
Optimized for Safety Systems: This actuator is purpose-built for high-reliability environments. It is a preferred choice for Emergency Shutdown (ESD), SIS, and HIPPS applications where the integrity of the actuation stroke is vital to plant safety and environmental protection.
-
Superior Stroking Speed: Engineered to move large volumes of air through its internal ports quickly, the G-Series is ideal for fast-stroking applications. This rapid response is critical for isolating high-pressure lines or protecting downstream equipment from pressure surges.
-
Extreme Thrust for Large Valves: The G-Series provides the massive torque and thrust required to operate large-scale valves against significant differential pressures, ensuring consistent performance regardless of the valve’s size or service conditions.
Technical Performance Matrix
| Feature | Details |
| Actuator Type | Pneumatic (Spring-Return or Double-Acting) |
| Configuration | Modular Scotch Yoke or Linear |
| Application Suitability | SIS, ESD, HIPPS, Fast Stroking |
| Maintenance | Safe, modular field service |
| Fail-Safe Mode | Quickly reversible via interchangeable modules |
| Compatibility | Fisher Control Valves & Digital Isolation™ Products |
Primary Applications
-
High Integrity Pressure Protection (HIPPS): Rapidly isolating systems to prevent over-pressurization of downstream pipelines.
-
Safety Instrumented Systems (SIS): Serving as the final control element in automated safety loops.
-
Main Steam Isolation: High-speed, high-force closing for large power plant steam valves.
-
Digital Isolation™: Integrating with advanced digital controllers for high-fidelity diagnostic monitoring of valve health.
