Dual Plate Check Valve
Wafer Pattern / Double Door Design for Reverse Flow Prevention
Key Features & Benefits
✓
Retainerless body design (optional) to eliminate potential leak paths to the atmosphere.✓
Spring-assisted closure minimizes water hammer and slamming effects compared to swing check valves.✓
Extremely compact face-to-face dimensions and lightweight design for easy installation between flanges.✓
Independent spring action for each plate allows for installation in both horizontal and vertical (upward) flow pipelines.✓
Lower pressure drop due to the streamlined flow path and dual-door configuration.✓
Available with low-pressure and high-pressure seat leakage tests per API 598 standards.Normative Standard
Design:API 594, ASME B16.34
Testing:API 598 / EN 12266-1
Face to Face:API 594, ASME B16.10
Size Range:DN40 to DN1200 (2" to 48")
Pressure Rating
ASME Class 150 to 2500 / PN10 to PN400
End Connection
Wafer, Lug, or Double Flanged; suitable for installation between ANSI/ASME, DIN, and JIS flanges.
Materials
Body: ASTM A216 WCB / ASTM A351 CF8, CF8M, CF3M / Ductile Iron
Disc: SS 304 / SS 316 / Duplex Steel / Aluminum Bronze
Seat: Metal-to-Metal (SS316/Stellite) or Soft-Seated (EPDM, Viton, NBR, PTFE).
Operation
Spring-loaded dual plates open when fluid pressure exceeds the spring tension and snap shut rapidly as flow velocity reaches zero, preventing backflow and water hammer.
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