Through Conduit Double Expanding Gate Valves
Rugged subsea double expanding gate valve with full-bore design, zero-leakage sealing, and dependable performance for deep-water applications.
The ATV Subsea Through-Conduit Double Expanding Gate Valve is a high-integrity isolation valve engineered for demanding offshore and subsea oil & gas environments. It provides true double block-and-bleed capability, delivering zero leakage from both upstream and downstream sides—even under full differential pressure. Its full-bore through-conduit design ensures minimal turbulence, low pressure drop, and smooth pigging operations.
Built to withstand high pressure, high temperature, and deep-water conditions, this valve supports depths up to 3,000 meters. It features a forged, bolted body and bonnet, bi-directional metal-to-metal sealing, hard-faced sealing surfaces, and a reliable rising-stem design. Actuation options include ROV operation or electric actuation. Manufactured according to leading industry standards, the valve can be customized in materials, end connections, and configurations to meet project-specific needs.
Main Features
- Forged body and bonnet
- Bolted bonnet
- Through Conduit
- Full Bore
- Bi-Directional sealing
- Mechanical energized Metal Seated
- Rising Stem
- T-shaped joint between gate and stem
- Metal-to-Metal backseat
- CRA overlay on sealing areas or all wetted parts
- Primary Metal Static sealing
- Multiple Redundant thermoplastic stem sealing
- Elastomeric environmental seal to prevent seawater ingress
- Anti blow‐out stem
- 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
- In-line bleeding system
- By-pass
- Seat skirts
- Extended stem
- Client specific Type Approval or Design Validation test
- PED
- Welded pups or transition pieces
- Painting according to Customer Specification
Benefit
- Robust design for harsh services
- Double block and bleed valve
- High sealing capability
- Suitable for high pressure, high temperature
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 Super-duplex Stainless Steel
- Nickel Alloys
NACE material available upon request
Norsok material available upon request
- 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.