DGV cast steel swing check valves are widely used in the industries of oil, chemical, medicine-made, fertilizer, city
construction, etc. The swing type check valve is designed as full bore full open structure in order to clean the pipeline; large
size check valve can be designed as buffering damp structure in order to protect seat seal surface and reduce the damage
of pipeline at water hammer status. Seat seal surface overlaid with wearing resistant hardened alloy to be matched with
disc seal surface; the stem is specially treated to ensure its strength, rigidity, corrosion resistance and abrasion
resistance. Valves are available in a complete range of body/bonnet materials and trims, which are widely used for the
medium of water, steam, oil product, nitric acid, acetic acid, oxygenation, etc.

Applicable Standard
Design Standard:     BS 1868, ASME B16.34, API 6D, DIN2533
Face to Face:          ASME B16.10, API 6D, EN 558, DIN 3202
End Flange:             ASME B16.5, ASME B16.47, DIN2501, DIN2533
Buttwelding Ends:    ASME B16.25, DIN3239
Inspection and Test: API 598, DIN3230

Products Range
Size:                     2" ~ 36" (DN50 ~ DN900)
Rating:                  ANSI 150lb-1500lb                      

Body Materials:      Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel
Trim:                     Per API 600

Design Features
Full open design
Bolted cover.
Swing type disc design
Optional buffering damp structure
Renewable or and welded seat
Flanged or buttwelding ends