STANDARD MODEL
STANDARD MODEL
VALVE DESCRIPTION
Subsea top entry ball valves are designed according to API6DSS, API6A, API17D with the addition of customer requirements when present. The valves do not rely on lubricant or grease to assist sealing between the ball and seat. Metal-to-metal sealing is used between the ball and seat and non-elastomeric seal are provided between the seat and body. Metal-to-metal sealing is also provided between body-to-bonnet and stem-to-body (optional).The Subsea ball valves are actuated by Perar hydraulic actuator or gearbox as requested.
BASIC CHARACTERISTICS
- API6DSS, API6A, API17D design as requested
- Bi-directional sealing
- Spring loaded metal-to-metal seats (tungsten carbide coating 0,2 mm – 0,4 mm thickness)
- Anti-blow out design stem
- Non-elastomeric seals to avoid the risk of gradual degradation of the seals over their life
- Full metal-to-metal sealing at body-bonnet and valve stem
- Forged material to comply with API6A PSL3
- Valve actuation with dedicated hydraulic actuator and ROV operable Gearbox (fixed or retrievable)
Features
- Primary Metal Seat Standard
- Seal Welded Vent Standard
- Self relieving Seats Standard
- Electrical Continuity Standard
- Double Piston Seat On Request
- Seal Areas Overlay Standard
- Double Block and Bleed On Request
- Wetted Areas Overlay On Request
- Anti blow-out stem Standard
- Primary Metal Seals (BX) Standard
- Diver, ROV or Actuated As Requested
- Primary Metal Stem Seal On Request
- Hybrid valve (Metal SR/Soft DPE) On Request
- API6A/API17D qualification As Requested
Material Selection
BODY, BONNET, PUPS
– ASTM A350-LF2 + Inconel 625 overlay
– ASTM A694-F52/F56/F60/F65 + Inconel 625 overlay
– ASTM A182-F22 + Inconel 625 overlay
– Duplex 22% Cr
– Superduplex 25% Cr
– Inconel 625
TRIM (SEAT, BALL AND STEM)
– ASTM A350-LF2 + Inconel 625 overlay
– ASTM A694-F52/F56/F60/F65 + Inconel 625 overlay
– Duplex 22% Cr
– Superduplex 25% Cr
– Inconel 625
– Inconel 718
BODY SEALS / SEAT SEALS
– METAL GASKET (BX type gasket)
– LIPSEAL– PTFE + ELGILOY
– CHEVRON PACK – PTFE + PEEK + ELGILOY
– OR – HNBR AED (for seawater sealing)
SEAT INSERT
– METAL WITH TUNGSTEN CARBIDE COATING (MIN. TH. 0.2 mm)
– METAL WITH TUNGSTEN CARBIDE COATING (MIN. TH. 0.4 mm)
– PEEK / PCTFE / KEL-F / NYLON (DEVLON V-API)
BOLTING
– ASTM A320-L7 / A193-B7 (XYLAN COATED, ZINC ELECTROGALVANIZED)
– ASTM A320-L7M / A193-B7M (XYLAN COATED, ZINC ELECTROGALVANIZED)
– ASTM A453-GR.660 (XYLAN COATED)
– ZERON100 (25% Cr)
