6A Dual Plate Check Valve – Class 150 to 2500, NPS ½" to 48" - NSW

The NSW 6A Dual Plate Check Valve is engineered to meet the most demanding applications in offshore and corrosive environments, utilizing ASTM A995 6A super duplex stainless steel. This valve features a compact dual-plate design, providing reliable non-return flow protection with low fluid resistance and fast closure to prevent water hammer. The check valve is available from NPS ½" to 48" with pressure ratings from Class 150 to 2500. Designed and manufactured in accordance with API 594, and tested per API 598, this valve is suitable for use in offshore platforms, subsea pipelines, marine systems, and aggressive chemical processing where resistance to chloride-induced stress corrosion and high strength are critical. The 6A grade material offers superior corrosion resistance, especially in chloride-rich or sour environments.

Specifications:

– Manufacturer: NSW
– Valve Type: Dual Plate Check Valve
– Size Range: NPS ½" to 48" (DN15 to DN1200)
– Pressure Class: ANSI Class 150, 300, 600, 900, 1500, 2500
– End Connections:
 • Flanged – ANSI B16.5
 • Large Bore Flanged – ANSI B16.47
– Design Standard: API 594
– Face-to-Face Standard: API 594
– Testing & Inspection Standard: API 598
– Fire Safe Design: Available as per API 6FA / API 607 (optional)
– Corrosion Compliance: NACE MR-0175, NACE MR-0103, ISO 15848
– Body Material Options:
 • Super Duplex Stainless Steel – ASTM A995 6A
 • Stainless Steel – CF8, CF8M, CF3, CF3M
 • Duplex Steel – A995 4A, 5A
 • Carbon Steel – A216 WCB
 • Low Temp Carbon Steel – A352 LCB, LCC, LC2
 • Forged Steel – A105, A182 F304, F304L, F316, F316L, F51, F53
 • Exotic Alloys – Monel, Inconel, Hastelloy
– Disc Type: Dual Plate (Swing Type)
– Seal Type: Metal Seated or Rubber Seated

For further specifications or to inquire about this equipment and ReflowX's logistics services, Please contact ReflowX at info@reflowx.com