Swing Check Valves
High-reliability subsea swing check valve designed for one-way flow control in piggable pipelines. Rated up to 20,000 psi and 10,000 ft water depth with metal-to-metal sealing.
The ATV SPA Subsea Swing Check Valve is a high-performance, one-way flow control valve engineered for demanding subsea operations, especially in piggable pipeline systems. It ensures automatic reverse-flow protection using a free-swinging clapper and a full-bore, metal-to-metal sealing design that minimizes pressure drop and maximizes flow efficiency.
Built with either forged or cast materials and a bolted bonnet construction, this valve is designed for long-term reliability under extreme pressures and deep-water conditions. It includes welded-in or removable seats, and the sealing surfaces can be enhanced with corrosion-resistant alloy (CRA) overlays.
To ensure durability in subsea environments, the valve features elastomeric environmental sealing to prevent seawater ingress. It supports shaft sealing configurations in metal or thermoplastic, making it compatible with additional mechanisms such as dampers or actuators.
The valve meets stringent industry standards (API 17D, API 6A, API 6DSS) and has been field-proven with a large installed base (TRL7). It supports pressures up to 20,000 psi, temperatures from –46°C to +204°C, and water depths up to 3,048 m (10,000 ft). Custom options include special sizes, pressure ratings, pigging-friendly features, lock-open devices, hydraulic dampers, and custom coatings.
Main Features
- Forged or cast body and bonnet
- Bolted bonnet
- Full Bore
- Free-swinging clapper
- Metal-to-Metal design
- Welded-in or removable seat
- CRA overlay on sealing areas or all wetted parts
- Primary Metal Static sealing
- Metal and thermoplastic seals available for shaft sealing (in case of gearbox / damper)
- Elastomeric environmental seal to prevent seawater ingress
- Design validation to API 17D / API 6A or API 6DSS
- Field-Proven technology up to TRL7 due to a large installed base
- Long design life, maintenance free
Options
- Customized size and design pressure according to Project requirements
- Design features to allow line pigging operation (conduit clapper, seat and b75ody enhanced designs)
- Reduced bore
- Lock-Open device (to allow pigging operation)
- Lock-Open position indicator
- Hydraulic damper
- Client specific Type Approval or Design Validation test
- PED
- Welded pups or transition pieces
- Painting according to Customer Specification
Benefit
- Robust design
- Automatic shutdown to protect the downstream in case of reverse flow
- Low pressure drop
- Piggable upon application
Technical Data
Greater Depth upon application
QL1 or QL2
PSL-3, PSL-4
Main Components:
- Carbon Steel or Low Alloy Steel
- Stainless Steel
- Duplex and Superduplex Stainless Steel
- Nickel Alloys
NACE material available upon request
Norsok material available upon request
Only to lock-open to allow pigging operations:
- Direct ROV interface up to API 17H Class 7 or handwheel
- Gearbox with ROV interface up to API 17H Class 7 or handwheel
ATV operators are suitable for electric actuation by drop-in All-Electric Subsea Actuator.