Subsea Check Valves

Subsea swing check valves are suitable in water depths
to 500 m (1700 ft) and maintain an average service life of 25 years. Available in both forged or cast materials, the design ensures total reliability for high pressure and high temperature services.
The swinging action of the disc away from the seat allows forward flow and when the flow is stopped, the disc returns to the seat, preventing backflow. Swing check valves are suitable for installations in lines where pigging operations are required for various maintenance services. The piggable design makes the swing check valve ideal for installation in riser pipelines and subsea applications.
Convenience of operation and simple in-line maintenance are essential features of our design. lnternal parts can be inspected and repaired without removing the valve off the pipeline even where space is restricted as in the top-entry trunnion ball valve construction.
The valve can be installed in both vertical and horizontal positions and offers unsurpassed quality and reliability­while the simple design minimizes maintenance costs. Material selection is fully customizable to meet customers project specifications.

Axial, Piston and Swing Check Valves for Surface and Subsea Applications

Maverick’s Check Valve range supports client needs for a flexible approach to solutions where protection against back flow and pressure surges are concerned. The robust design of the Swing Check Valve is typically favoured to overcome these service conditions on large bore applications, whereas the Axial and Piston Check products provide assurance where a more compact design is demanded.

BENEFITS

• Corrosion resistant
• Gas tight sealing
• Non-return

Material options : Carbon steel, low alloy steel, stainless
steel, duplex, super duplex and inconel
Actuation : Manual, ROV

• Standards
  • API 6A, API 6D, API 6D-SS, API 17D,
  • API6AV1, ISO 10423, ISO 13628,
  • ISO 14313, ISO 14723

SPECIFICATIONS

• Pressure rating ANSI 600 to 2,500
• API 3,000 to 15,000 psi
• Temperature -100˚c to +190˚c
• Water depth To 4,500m
• Bore sizes 2” to 20”

Configurations

• Axial, piston or swing
• Forged or cast body
• Full or partial clad
• Full or reduced bore
• Lock-open mechanism
• Metal-to-metal
• Various end connection

• OPTIONS
• Stellite hard facing

Design features

• Metal-seated with hardfacing on disk and seat.
• Welded-in-seat ring.
• Body/bonnet sealing with a secondary environmental soft seal as additional barrier to seawater ingress into the valve
• Easy in-line maintenance as in the top-entry trunnion ball valve construction.
• Suitable for horizontal and vertical (flow-up) installation.
• Suited for low velocity service.
• Fully piggable design.
• De-clutchable device for loek opening du ring pipeline cleaning with ROV interface.
• Suitable for flow rates with corrosive and dirty fluids.
• Cathodic protection for the whole system, on request.

Testing & certification

• Compliance with API 6D55 inspection and testing.
• PED 2014/68/UE.
• Hyperbaric validation testing as per API 6DSS.