SUBSEA ROTARY GATE VALVE

Subsea rotary gate valves are designed according to API6A and API17D with the addition of customer requirements when present. The valves do not rely on lubricant or grease to assist sealing between the gate and seat. Metal-to-metal sealing is used between the gate and seat. Metal-to-metal sealing is also provided between body-to-bonnet. The Subsea rotary valves are actuated by hydraulic actuator or direct manual ROV interface.

BASIC CHARACTERISTICS

  • API6A, API17D design as requested
  • Bi-directional sealing
  • Hard-faced metal seated design with TCC on body and integral TC flat gates
  • Non-elastomeric seals to avoid the risk of gradual degradation of the seals over their life
  • Full metal-to-metal sealing at any primary pressure boundary.
  • Anti blow-out stem
  • Forged material to comply with API6A PSL3
  • Valve actuation with dedicated hydraulic actuator

OTHER CHARACTERISTICS

Size:1/2”, 3/4”
Pressure Classes:API 10000 to 15000
Temperature Range:-46°C to 145°C
FeaturesFeatures
Primary Metal SeatStandardElectrical ContinuityStandard
Primary Metal Seals (BX)StandardAPI6A/API17D qualificationAs Requested
Diver, ROV or ActuatedAs Requested
BODY, BONNET
  • Duplex 22% Cr
  • Superduplex 25% Cr
  • Inconel 625
TRIM (SEAT, GATE AND STEM)
  • Superduplex 25% Cr
  • Inconel 725
  • Inconel 718
BODY SEALS / SEAT SEALS
  • METAL GASKET (BX type gasket)
  • LIPSEAL– PTFE + ELGILOY
  • V – PACK – PTFE + PEEK + ELGILOY
  • OR – HNBR AED (for seawater sealing)
SEAT INSERT
  • METAL WITH TUNGSTEN CARBIDE COATING
  • PEEK / PCTFE / PTFE (back insert)
BOLTING
  • ASTM A320-L7 / A193-B7 (XYLAN COATED, NICKEL/ZINC PLATED)
  • ASTM A320-L7M / A193-B7M (XYLAN COATED, NICKEL/ZINC PLATED)
  • ASTM A453-GR.660 (XYLAN COATED)
  • UNS S32760 (25% Cr)

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