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Gas over Oil Actuators for High Integrity Valve Automation
Nordenflow’s Gas-over-Oil (GOO) Actuators provide a self-contained automation solution for remote midstream pipelines where pneumatic or electric power is unavailable. Utilizing the pipeline’s own gas pressure to drive a high-torque hydraulic mechanism, our units are engineered for Emergency Shutdown (ESD) and Line Break service. Each system is equipped with advanced Rate-of-Drop detection logic and an integrated Local Control Panel (LCP), ensuring the highest level of safety and reliability in harsh desert or arctic environments.
Product Overview
Gas-over-oil actuators are ideal for pipeline, compressor, and gas transmission systems where compressed air is not available.
They ensure reliable operation during pressure variations and offer long-term service with minimal maintenance.
⚙️Technical Features
- Operating medium: pipeline gas (Sweet or Sour Gas supply) or nitrogen
- Actuation type: quarter-turn (for ball & plug valves) or linear (for gate & globe valves)
- Hydraulic hand pump for emergency control ,hydraulic power pack (HPP)
- Gas-hydraulic tanks and weatherproof lockable cabinet
- gas storage facilities
- pneumatic pilot system
- Operating modes: double-acting or spring-return
(fail-safe to open or close) - Torque / Thrust range: 1000 … 200,000 Nm / 1000KN
- DESIGN PRESSURE: Barg 100 (Barg 150 on request)
- Temperature range: −40°C … +80°C (extended options on request)
- Safety compliance: SIL2-capable, ATEX certified versions available
- DESIGN: ISO 12490 | API 6DX | EN15714 | ISO5211
Request a Consultation for Line-Break System Design.
Due to the complexity of line-break and pipeline applications, contact our specialists for a custom torque and pressure requirement analysis.
🔩 Key Advantages
- No need for external air supply — uses line gas directly
- Reliable operation in remote or unmanned sites
- Energy-efficient and low-maintenance design
- High torque output for large-diameter valves
- ESD function for electric supply failure to SOV
- Line Break System
- Compatible with Partial Stroke Test (PST) and ESD systems
Typical Applications
- Mainline block valves and emergency shutdown valves in gas pipelines
- Compressor stations and gas storage terminals
- LNG and cryogenic transfer systems
- Refinery isolation and pressure safety loops
- Remote wellhead or offshore riser valves
- Underground gas caverns and distribution networks
Ask us about various line break system configurations tailored to your project requirements. We offer specialized sensing for pressure-drop (rate-of-drop) detection and integrated Local Control Panels (LCP) to ensure operational continuity in remote locations.
Our expertise covers both electronic and pneumatic line break systems; we can provide a detailed comparison of both technologies to help you select the optimal solution for your specific application.
Also, about Actuator Sizing and Selection Considerations (section on how to choose based on torque, accumulator, functional, and adjusted speed)
