SUBSEA WELDED BALL VALVE

Subsea welded 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-gland and stem-to-body (optional). The Subsea welded ball valves are actuated by Perar hydraulic actuator or gearbox as requested.

Suitable for: Subsea

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 or welding at any primary pressure boundary including valve stem
Forged material to comply with API6A PSL3
Valve actuation with dedicated hydraulic actuator and ROV operable Gearbox (fixed or retrievable)

OTHER CHARACTERISTICS

	900-1500 lbs / 3000 psi	5000 psi / 2500 lbs	7500 psi	10000 psi	15000 psi
½”-3”	Standard	Standard	Standard	Standard	Standard
4”-12”	Standard	Standard	Standard	Standard	Standard
14”-22”	Standard	Standard	Standard
24”-30”	Standard	Standard
32”-48”	Standard

Features		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	On Request	Primary Metal Stem Seal	On Request
Hybrid valve (Metal SR/Soft DPE)	As Requested	API6A/API17D qualification	As Requested

BODY, CLOSURE, 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/Destec) 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, 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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