OVERVIEW: The DD-DW1 ductile iron body, lead free double disc swing check valves use spring assisted half-discs to help keep slamming and surges to a minimum. The wafer style body design is compact and light, and it mates to 150# flanges for 2" to 6" sizes. (Also available for 300# flanges. Contact factory.) The body is coated with Tnemec Series 141 Epoxoline, which is certified by NSF in accordance with NSF/ANSI standard 61 and for potable water use.
It is suitable for frequent flow reversals, but not fluids with solids. Buna-N, EPDM, or Viton seats, and stainless steel or aluminum-bronze discs, with have precision machined surfaces to maintain a bubble seal that meets API 598 leakage requirements, and API 594 dimensions. Discs are designed with very low cracking pressure, which reduces the amount of energy needed to open the valve.
Also available in FM approved version. Contact factory.
For clean liquids.
MODEL | TYPE |
SIZE
(in)
|
ENDS | BODY MTL | SEAT | DISC | CLASS | Cv |
WT
(lbs)
|
A
(in)
|
B
(in)
|
C
(in)
|
D
(in)
|
E
(in)
|
ITEM NO |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
DD-DW1 | DBL DISC | 2 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 62 | 3.3 | 2.12 | 4.02 | 2.17 | 2.58 | 1.66 | VCDD-DW1BBT0200 |
DD-DW1 | DBL DISC | 2.5 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 110 | 5.2 | 2.38 | 4.76 | 2.92 | 3.15 | 2.28 | VCDD-DW1BBT0250 |
DD-DW1 | DBL DISC | 3 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 175 | 7.0 | 2.62 | 5.24 | 3.45 | 3.70 | 2.78 | VCDD-DW1BBT0300 |
DD-DW1 | DBL DISC | 4 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 350 | 14.0 | 2.62 | 6.73 | 4.12 | 4.61 | 3.38 | VCDD-DW1BBT0400 |
DD-DW1 | DBL DISC | 5 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 550 | 18.0 | 3.25 | 7.60 | 5.67 | 5.71 | 4.53 | VCDD-DW1BBT0500 |
DD-DW1 | DBL DISC | 6 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 850 | 26.5 | 3.75 | 8.62 | 6.43 | 6.69 | 5.49 | VCDD-DW1BBT0600 |
DD-DW1 | DBL DISC | 8 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 1500 | 43.0 | 5.00 | 10.87 | 8.56 | 8.82 | 7.40 | VCDD-DW1BBT0800 |
DD-DW1 | DBL DISC | 10 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 2400 | 70.0 | 5.50 | 13.23 | 10.43 | 10.43 | 9.14 | VCDD-DW1BBT1000 |
DD-DW1 | DBL DISC | 12 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 3700 | 108.0 | 7.12 | 15.98 | 12.21 | 12.20 | 10.65 | VCDD-DW1BBT1200 |
DD-DW1 | DBL DISC | 14 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 5400 | 175.0 | 7.25 | 17.64 | 14.17 | 14.17 | 12.97 | VCDD-DW1BBT1400 |
DD-DW1 | DBL DISC | 16 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 8250 | 200.0 | 7.50 | 20.12 | 16.13 | 16.14 | 14.63 | VCDD-DW1BBT1600 |
DD-DW1 | DBL DISC | 18 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 10400 | 258.0 | 8.00 | 21.50 | 17.32 | 17.72 | 16.26 | VCDD-DW1BBT1800 |
DD-DW1 | DBL DISC | 20 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 14200 | 345.0 | 8.38 | 23.74 | 20.10 | 19.88 | 18.17 | VCDD-DW1BBT2000 |
DD-DW1 | DBL DISC | 24 | WAFER | DUCTILE IRON | BUNA-N | ALUMINUM BRONZE | 150 | 23000 | 460.0 | 8.75 | 28.11 | 23.66 | 24.57 | 22.62 | VCDD-DW1BBT2400 |
DD-DW1 | DBL DISC | 2 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 62 | 3.3 | 2.12 | 4.02 | 2.17 | 2.58 | 1.66 | VCDD-DW1BET0200 |
DD-DW1 | DBL DISC | 2.5 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 110 | 5.2 | 2.38 | 4.76 | 2.92 | 3.15 | 2.28 | VCDD-DW1BET0250 |
DD-DW1 | DBL DISC | 3 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 175 | 7.0 | 2.62 | 5.24 | 3.45 | 3.70 | 2.78 | VCDD-DW1BET0300 |
DD-DW1 | DBL DISC | 4 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 350 | 14.0 | 2.62 | 6.73 | 4.12 | 4.61 | 3.38 | VCDD-DW1BET0400 |
DD-DW1 | DBL DISC | 5 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 550 | 18.0 | 3.25 | 7.60 | 5.67 | 5.71 | 4.53 | VCDD-DW1BET0500 |
DD-DW1 | DBL DISC | 6 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 850 | 26.5 | 3.75 | 8.62 | 6.43 | 6.69 | 5.49 | VCDD-DW1BET0600 |
DD-DW1 | DBL DISC | 8 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 1500 | 43.0 | 5.00 | 10.87 | 8.56 | 8.82 | 7.40 | VCDD-DW1BET0800 |
DD-DW1 | DBL DISC | 10 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 1400 | 70.0 | 5.50 | 13.23 | 10.43 | 10.43 | 9.14 | VCDD-DW1BET1000 |
DD-DW1 | DBL DISC | 12 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 3700 | 108.0 | 7.12 | 15.98 | 12.21 | 12.20 | 10.65 | VCDD-DW1BET1200 |
DD-DW1 | DBL DISC | 14 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 5400 | 175.0 | 7.25 | 17.64 | 14.17 | 14.17 | 12.97 | VCDD-DW1BET1400 |
DD-DW1 | DBL DISC | 16 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 8250 | 200.0 | 7.50 | 20.12 | 16.13 | 16.14 | 14.63 | VCDD-DW1BET1600 |
DD-DW1 | DBL DISC | 18 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 10400 | 258.0 | 8.00 | 21.50 | 17.32 | 17.72 | 16.26 | VCDD-DW1BET1800 |
DD-DW1 | DBL DISC | 20 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 14200 | 345.0 | 8.38 | 23.74 | 20.10 | 19.88 | 18.17 | VCDD-DW1BET2000 |
DD-DW1 | DBL DISC | 24 | WAFER | DUCTILE IRON | EPDM | ALUMINUM BRONZE | 150 | 23000 | 460.0 | 8.75 | 28.11 | 23.66 | 24.57 | 22.62 | VCDD-DW1BET2400 |
DD-DW1 | DBL DISC | 2 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 62 | 3.3 | 2.12 | 4.02 | 2.17 | 2.58 | 1.66 | VCDD-DW1SBT0200 |
DD-DW1 | DBL DISC | 2.5 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 110 | 5.2 | 2.38 | 4.76 | 2.92 | 3.15 | 2.28 | VCDD-DW1SBT0250 |
DD-DW1 | DBL DISC | 3 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 175 | 7.0 | 2.62 | 5.24 | 3.45 | 3.70 | 2.78 | VCDD-DW1SBT0300 |
DD-DW1 | DBL DISC | 4 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 350 | 14.0 | 2.62 | 6.73 | 4.12 | 4.61 | 3.38 | VCDD-DW1SBT0400 |
DD-DW1 | DBL DISC | 5 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 550 | 18.0 | 3.25 | 7.60 | 5.67 | 5.71 | 4.53 | VCDD-DW1SBT0500 |
DD-DW1 | DBL DISC | 6 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 850 | 26.5 | 3.75 | 8.62 | 6.43 | 6.69 | 5.49 | VCDD-DW1SBT0600 |
DD-DW1 | DBL DISC | 8 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 1500 | 43.0 | 5.00 | 10.87 | 8.56 | 8.82 | 7.40 | VCDD-DW1SBT0800 |
DD-DW1 | DBL DISC | 10 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 2400 | 70.0 | 5.50 | 13.23 | 10.43 | 10.43 | 9.14 | VCDD-DW1SBT1000 |
DD-DW1 | DBL DISC | 12 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 3700 | 108.0 | 7.12 | 15.98 | 12.21 | 12.20 | 10.65 | VCDD-DW1SBT1200 |
DD-DW1 | DBL DISC | 14 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 5400 | 175.0 | 7.25 | 17.64 | 14.17 | 14.17 | 12.97 | VCDD-DW1SBT1400 |
DD-DW1 | DBL DISC | 16 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 8250 | 200.0 | 7.50 | 20.12 | 16.13 | 16.14 | 14.63 | VCDD-DW1SBT1600 |
DD-DW1 | DBL DISC | 18 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 10400 | 258.0 | 8.00 | 21.50 | 17.32 | 17.72 | 16.26 | VCDD-DW1SBT1800 |
DD-DW1 | DBL DISC | 20 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 14200 | 345.0 | 8.38 | 23.74 | 20.10 | 19.88 | 18.17 | VCDD-DW1SBT2000 |
DD-DW1 | DBL DISC | 24 | WAFER | DUCTILE IRON | BUNA-N | STAINLESS STEEL | 150 | 23000 | 460.0 | 8.75 | 28.11 | 23.66 | 24.57 | 22.62 | VCDD-DW1SBT2400 |
DD-DW1 | DBL DISC | 2 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 62 | 3.3 | 2.12 | 4.02 | 2.17 | 2.58 | 1.66 | VCDD-DW1SET0200 |
DD-DW1 | DBL DISC | 2.5 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 110 | 5.2 | 2.38 | 4.76 | 2.92 | 3.15 | 2.25 | VCDD-DW1SET0250 |
DD-DW1 | DBL DISC | 3 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 175 | 7.0 | 2.62 | 5.24 | 3.45 | 3.70 | 2.78 | VCDD-DW1SET0300 |
DD-DW1 | DBL DISC | 4 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 350 | 14.0 | 2.62 | 6.79 | 4.12 | 4.61 | 3.38 | VCDD-DW1SET0400 |
DD-DW1 | DBL DISC | 5 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 550 | 18.0 | 3.25 | 7.60 | 5.67 | 5.71 | 4.53 | VCDD-DW1SET0500 |
DD-DW1 | DBL DISC | 6 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 850 | 26.5 | 3.75 | 8.62 | 6.43 | 6.69 | 5.49 | VCDD-DW1SET0600 |
DD-DW1 | DBL DISC | 8 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 1500 | 43.0 | 5.00 | 10.87 | 8.56 | 8.82 | 7.40 | VCDD-DW1SET0800 |
DD-DW1 | DBL DISC | 10 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 2400 | 70.0 | 5.50 | 13.23 | 10.43 | 10.43 | 9.14 | VCDD-DW1SET1000 |
DD-DW1 | DBL DISC | 12 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 3700 | 108.0 | 7.12 | 15.98 | 12.21 | 12.20 | 10.65 | VCDD-DW1SET1200 |
DD-DW1 | DBL DISC | 14 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 5400 | 175.0 | 7.25 | 17.64 | 14.17 | 14.17 | 12.97 | VCDD-DW1SET1400 |
DD-DW1 | DBL DISC | 16 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 8250 | 200.0 | 7.50 | 20.12 | 16.13 | 16.14 | 14.63 | VCDD-DW1SET1600 |
DD-DW1 | DBL DISC | 18 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 10400 | 258.0 | 8.00 | 21.50 | 17.32 | 17.72 | 16.26 | VCDD-DW1SET1800 |
DD-DW1 | DBL DISC | 20 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 14200 | 345.0 | 8.38 | 23.74 | 20.10 | 19.88 | 18.17 | VCDD-DW1SET2000 |
DD-DW1 | DBL DISC | 24 | WAFER | DUCTILE IRON | EPDM | STAINLESS STEEL | 150 | 23000 | 460.0 | 8.75 | 28.11 | 23.66 | 24.57 | 22.62 | VCDD-DW1SET2400 |
DD-DW1 | DBL DISC | 2 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 62 | 3.3 | 2.12 | 4.02 | 2.17 | 2.58 | 1.66 | VCDD-DW1SVT0200 |
DD-DW1 | DBL DISC | 2.5 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 110 | 5.2 | 2.38 | 4.76 | 2.92 | 3.15 | 2.28 | VCDD-DW1SVT0250 |
DD-DW1 | DBL DISC | 3 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 175 | 7.0 | 2.62 | 5.24 | 3.45 | 3.70 | 2.78 | VCDD-DW1SVT0300 |
DD-DW1 | DBL DISC | 4 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 350 | 14.0 | 2.62 | 6.73 | 4.12 | 4.61 | 3.38 | VCDD-DW1SVT0400 |
DD-DW1 | DBL DISC | 5 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 550 | 18.0 | 3.25 | 7.60 | 5.67 | 5.71 | 4.53 | VCDD-DW1SVT0500 |
DD-DW1 | DBL DISC | 6 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 850 | 26.5 | 3.75 | 8.62 | 6.43 | 6.69 | 5.49 | VCDD-DW1SVT0600 |
DD-DW1 | DBL DISC | 8 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 1500 | 43.0 | 5.00 | 10.87 | 8.56 | 8.82 | 7.40 | VCDD-DW1SVT0800 |
DD-DW1 | DBL DISC | 10 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 2400 | 70.0 | 5.50 | 13.23 | 10.43 | 10.43 | 9.14 | VCDD-DW1SVT1000 |
DD-DW1 | DBL DISC | 12 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 3700 | 108.0 | 7.12 | 15.98 | 12.21 | 12.20 | 10.65 | VCDD-DW1SVT1200 |
DD-DW1 | DBL DISC | 14 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 5400 | 175.0 | 7.25 | 17.64 | 14.17 | 14.17 | 12.97 | VCDD-DW1SVT1400 |
DD-DW1 | DBL DISC | 16 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 8250 | 200.0 | 7.50 | 20.12 | 16.13 | 16.14 | 14.63 | VCDD-DW1SVT1600 |
DD-DW1 | DBL DISC | 18 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 10400 | 258.0 | 8.00 | 21.50 | 17.32 | 17.72 | 16.26 | VCDD-DW1SVT1800 |
DD-DW1 | DBL DISC | 20 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 14200 | 345.0 | 8.38 | 23.74 | 20.10 | 19.88 | 18.17 | VCDD-DW1SVT2000 |
DD-DW1 | DBL DISC | 24 | WAFER | DUCTILE IRON | VITON | STAINLESS STEEL | 150 | 23000 | 460.0 | 8.75 | 28.11 | 23.66 | 24.57 | 22.62 | VCDD-DW1SVT24000 |