Hydraulic Rack & Pinion Actuator
A compact, high-torque subsea hydraulic rack & pinion actuator designed for reliable quarter-turn valve control in deepwater applications.
The ATV Subsea Hydraulic Rack & Pinion Actuator is a high-performance quarter-turn hydraulic actuator designed for controlling subsea ball valves in harsh offshore environments. Built for compactness and dependable torque output, it uses a rack-and-pinion mechanism that ensures efficient rotary motion with minimal footprint and weight.
Available in single-acting (spring return) or double-acting configurations, the actuator is pressure-balanced and equipped with an integrated compensation system for ultra-deepwater use. It supports fast stroking for safety-critical systems such as ESDV and HIPPS, and includes an ROV interface that allows local intervention without fluid displacement.
Engineered with redundant sealing, corrosion-resistant materials, mechanical position indication, and compatibility with functional safety architectures up to SIL-3, the actuator is validated to major industry standards. A wide range of custom options is available, including diver/ROV retrievability, special hydraulic connectors, orientation options, and compatibility with ATV’s all-electric subsea actuator.
Main Features
- Rack & Pinion design for quarter-turn operation (e.g. subsea ball valves)
- Compact, modular design engineered for minimal footprint and weight
- Robust and simple internal mechanism
- Supplied fully integrated with its corresponding valve for optimal performance and reduced installation complexity
- Spring return (single acting), or double acting hydraulic operation
- Pressure-Balanced design with integrated compensation system, suitable for ultra-deep installation
- Suitable for ESDV and HIPPS applications where fast stroking is requested
- ROV override interface for local subsea intervention
- No fluid displacement during ROV intervention
- Redundant sealing on all dynamic sealing areas
- Elastomeric environmental seal to prevent seawater ingress
- Local mechanical position indicator
- Design validation to API 17D / API 6A or API 6DSSX
- Proven up to Technology Readiness Level (TRL 7) with extensive subsea experience
- SIL-3 capable for integration into functional safety functions
- Long design life, maintenance-free operation
Options
- Custom design or input supply pressure according to project requirements
- Balanced single acting design (spring on both side)
- Wide selection of hydraulic connectors, including quick-couplings and hot-stab
- Remote position indicators: continuous transmitters and/or limit switches
- Wide selection of electrical connectors
- ROV interface available in multiple orientations
- ROV Bucket extension
- Local position indicator extension
- Diver or diverless retrievable configuration
- Mechanical clutch to aid subsea deployment (retrievable version)
- Centering and soft-landing system for safe subsea deployment (retrievable version)
- Custom Actuator Retrieval Tool (ART) interface
- Integrated handwheel for diver operation (shallow water applications)
- Drop-in manual torque tool with handwheel for diver operation (shallow water applications)
- Pressure protection cap
- ROV bucket debris protection cap
- Extended stroke capability for pig diverter applications (e.g. 120° )
- Client specific Type Approval or Design Validation test
- PED
- Painting according to Customer Specification
Benefit
- Comprehensive range of sizes
- Fully tailored to the valve for maximum performance in a compact footprint
- Field-proven technology with a large installed base
Technical Data
Applications
Configuration
Product Range
Design Pressure
Temperature Range
-10°C ÷ +70°C
Water Depth
- Up to 3048 m (10.000 ft)
- Greater Depth upon application
Compensation System
Manual Intervention
Quality Controls
QL-1 or QL-2
PSL-3, PSL-4
Materials
Electric actuation