Design and selection notes
Actuation, ends & standards
Actuation ≤ 6"Lever operation
Actuation > 6"Worm gear
Flange endASME B16.5 & ASME B16.47
Face-to-faceAPI 609; MSS SP-68
Other endsState it in the order
ZGVZHONGGONG VALVE GROUP
Butterfly Valves / Product 2564
Product parameters
Design and selection notes
Dimensions & weights
Units and blank cells are shown with the table.
| Size (in) | L (mm) | H1 (mm) | H (mm) | D0 (mm) | L0 (mm) | Weight (Kg) · Wafer | Weight (Kg) · Lug |
|---|---|---|---|---|---|---|---|
| 2 | 43 | 74 | 180 | 160 | 200 | 10 | 11 |
| 2-1/2 | 46 | 79 | 196 | 160 | 200 | 10 | 12 |
| 3 | 46 | 85 | 205 | 160 | 200 | 11 | 13 |
| 4 | 52 | 101 | 215 | 160 | 200 | 12 | 15 |
| 5 | 56 | 112 | 230 | 160 | 240 | 14 | 18 |
| 6 | 56 | 125 | 245 | 240 | 240 | 16 | 19 |
| 8 | 60 | 160 | 280 | 240 | 240 | 20 | 24 |
| 10 | 68 | 192 | 315 | 240 | 280 | 28 | 34 |
| 12 | 78 | 242 | 355 | 310 | 280 | 39 | 46 |
| 14 | 78 | 277 | 410 | 310 | -- | 67 | 77 |
| 16 | 102 | 302 | 425 | 310 | -- | 89 | 108 |
| 18 | 114 | 341 | 462 | 310 | -- | 109 | 125 |
| 20 | 127 | 366 | 495 | 310 | -- | 128 | 168 |
| 24 | 154 | 424 | 586 | 310 | -- | 230 | 280 |
| 30 | 165 | 520 | 690 | 400 | -- | 284 | 312 |
| 36 | 200 | 590 | 738 | 400 | -- | 368 | 442 |
| 42 | 251 | 656 | 838 | 400 | -- | 713 | 856 |
| 48 | 276 | 720 | 945 | 640 | -- | 864 | 1010 |
Structure & product views

Product parameters
Part materials
| Part | Material |
|---|---|
| Body | ASTM A216 WCB |
| Stem | ASTM A276 410 |
| Seat | NBR |
| Thrust Washer | 304 + PTFE |
| Plate | WCB |
| O-Ring | NBR |
Dimensions & weights
| Size (in) | L (mm) | H1 (mm) | H (mm) | D₀ (mm) | L₀ (mm) | Wafer weight (kg) | Lug weight (kg) |
|---|---|---|---|---|---|---|---|
| 2 | 43 | 74 | 180 | 160 | 200 | 10 | 11 |
| 2-1/2 | 46 | 79 | 196 | 160 | 200 | 10 | 12 |
| 3 | 46 | 85 | 205 | 160 | 200 | 11 | 13 |
| 4 | 52 | 101 | 215 | 160 | 200 | 12 | 15 |
| 5 | 56 | 112 | 230 | 160 | 240 | 14 | 18 |
| 6 | 56 | 125 | 245 | 240 | 240 | 16 | 19 |
| 8 | 60 | 160 | 280 | 240 | 240 | 20 | 24 |
| 10 | 68 | 192 | 315 | 240 | 280 | 28 | 34 |
| 12 | 78 | 242 | 355 | 310 | 280 | 39 | 46 |
| 14 | 78 | 277 | 410 | 310 | -- | 67 | 77 |
| 16 | 102 | 302 | 425 | 310 | -- | 89 | 108 |
| 18 | 114 | 341 | 462 | 310 | -- | 109 | 125 |
| 20 | 127 | 366 | 495 | 310 | -- | 128 | 168 |
| 24 | 154 | 424 | 586 | 310 | -- | 230 | 280 |
| 30 | 165 | 520 | 690 | 400 | -- | 284 | 312 |
| 36 | 200 | 590 | 738 | 400 | -- | 368 | 442 |
| 42 | 251 | 656 | 838 | 400 | -- | 713 | 856 |
| 48 | 276 | 720 | 945 | 640 | -- | 864 | 1010 |
Dimensions & weights
| Nominal size NPS (mm) | Max. differential pressure ΔP = 1.0 (MPa) | Max. differential pressure ΔP = 2.0 (MPa) |
|---|---|---|
| 50 | 14 | 26 |
| 65 | 18 | 30 |
| 80 | 26 | 48 |
| 100 | 38 | 63 |
| 125 | 86 | 132 |
| 150 | 110 | 203 |
| 200 | 210 | 395 |
| 250 | 358 | 668 |
| 300 | 529 | 1019 |
| 350 | 855 | -- |
| 400 | 1146 | -- |
| 450 | 1616 | -- |
| 500 | 2174 | -- |
| 600 | 3423 | -- |
| 700 | 5318 | -- |
| 800 | 7800 | -- |
| 900 | 12500 | -- |
| 1000 | 15000 | -- |
Dimensions & weights
| Nominal diameter DN (mm) | Flow coefficient Cv |
|---|---|
| 2 | 102 |
| 2-1/2 | 102 |
| 3 | 242 |
| 4 | 423 |
| 5 | 423 |
| 6 | 1160 |
| 8 | 2016 |
| 10 | 3066 |
| 12 | 4568 |
| 14 | 6325 |
| 16 | 8152 |
| 18 | 11023 |
| 20 | 13780 |
| 24 | 20486 |
| 28 | 31586 |
| 32 | 35612 |
| 36 | 47860 |
| 40 | 71460 |
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