SUBSEA SWING CHECK VALVE

Subsea swing check 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 disc and seat. Metal-to-metal sealing is used between disc and seat and the seat is welded to the valve body; both seat and disc are hardfaced with UNS N06625 or Stellite. Metal-to-metal sealing is also provided between body-to-bonnet and stem-to-body (optional) in case of ROV operated valves. The Subsea ball valves can be provided to be locked open by ROV.

Suitable for: Subsea

BASIC CHARACTERISTICS

API6DSS, API6A, API17D design as requested
Bi-directional pigging
Metal-to-metal seats (3mm hardfacing with Stellite 6 or Inconel 625)
ROV lock open stem design to keep valve fully open for reverse pigging.
Non-elastomeric seals to avoid the risk of gradual degradation of the seals over their life
Full metal-to-metal sealing at body-bonnet
Seat integral to valve body and with slope to engage the seat-to-disc sealing at low pressure
Forged material to comply with API6A PSL3
Valve actuation with dedicated hydraulic actuator or ROV operable device.

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”-9”	Standard	Standard	Standard	Standard	Standard
10”-22”	Standard	Standard	Standard
24”-30”	Standard	Standard
32”-36”	Standard
38”-48”	Standard

Features		Features
Primary Metal Seat	Standard	Seal Welded Vent	Standard
Full Opening Design	Standard	Electrical Continuity	Standard
Lock Open by ROV	As Requested	Seal Areas Overlay	Standard
Primary Metal Seals (BX)	Standard	Wetted Areas Overlay	On Request
Primary Metal Stem Seal	On Request	API6A/API17D qualification	As Requested

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 Stainless Steel (AISI 410, AISI316) Duplex 22% Cr Superduplex 25% Cr Inconel 625 Inconel 718
BODY SEALS / SEAT SEALS	METAL GASKET (BX type gasket) STEM METAL SEALING (TC coating 0.2 mm) LIPSEAL– PTFE + ELGILOY CHEVRON PACK – PTFE + PEEK + ELGILOY OR – HNBR AED (for seawater sealing)
SEAT/DISC HARDFACING	STELLITE 6 / STELLITE 12 UNS N06625 ULTIMET ALLOY
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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Carica altro

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SUBSEA SIDE ENTRY BALL VALVE

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