Delta Controls successfully completed an extensive rebuild of a large Bettis Scotch Yoke actuator for an offshore application, restoring the unit to full operational condition within a highly compressed timeline.
Challenge
The actuator arrived in severely deteriorated condition, with extensive wear and corrosion throughout critical components. During disassembly, it was also discovered that the main spring had failed, rendering the actuator non-operational.
Compounding the challenge, the project had a strict three-week turnaround time, requiring rapid engineering, manufacturing, and assembly.
Additionally, replacing the complete actuator was not a viable option due to:
- Long delivery times for a new unit
- A non-standard topworks interface with the ball valve
Engineering & Rebuild Scope
Delta Controls executed a full in-house solution, including:
- Complete disassembly and inspection
- Reverse engineering of critical components
- Finite Element Analysis (FEA) to validate the new design
- Manufacturing of a new spring cartridge and piston cartridge
- Supply and replacement of all necessary spare parts
The original yoke housing was retained and reused as a donor component, ensuring compatibility with the existing valve interface and avoiding costly system modifications.
Execution
Through close coordination between engineering and production teams, Delta Controls delivered:
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- Fast-track design and validation
- Precision manufacturing under tight deadlines
- Full actuator reassembly and functional restoration
Result
Within just three weeks, the Bettis actuator was fully rebuilt and restored to reliable, offshore-ready condition, extending its service life and avoiding costly replacement and downtime.
