Wafer Type Butterfly Valve maintains the sealing against the walls of the valve. This avoids the backflow of the fluids inside a piping system. The Lug And Wafer Type Butterfly Valves are used for different application types. The lug type has threaded inserts at both sides of the valve body. So they could be easily installed into a system with just two bolts and nuts. The Wafer Type Butterfly Check Valve can also come in concentric, doubly eccentric and triply eccentric types. These have their differences in applications as well. The concentric ones have a resilient rubber seat with a metal disc. The doubly eccentric type has high performance and it uses different materials for the seat and the disc.
Stainless Steel wafer type butterfly valve
ASTM A216 Gr. WCB Wafer Type Butterfly Valve
ASME B16.34 Butterfly Valve Lug Type
The Wafer Type Triple Offset Butterfly Valve has seats laminated or in solid metal. The wafer style valves have tightly fitting seal or gasket that prevents backflow and allows for unidirectional flow. The o-ring or gasket is precision machined. The valve also has flat faces on the upstream and downstream.
| Size | 50NB — 600NB |
|---|---|
| Pressure | 150PS1 |
| Temperature | 0 Deg C - 1200 Deg C. |
| Body , Chest | Solid One piece casting of Cast Iron Fg 260, Cast Steel Gr WCB ,CF8,CF8M. |
| Seat | Integral to Body, Soft, Optional. |
| Gate | AISI SS 304,316,316L,317,317L |
| Screw Spindle | AISI SS 410,304,316. |
| Nut | Brass |
| Yoke | Plate type of MS . |
| Gland Follower | Cast Iron , Cast steel , Ductile Iron ,CF8,CF8M. |
| Hand Wheel | Cast Iron , Cast steel , Ductile Iron |
| Gland Packing | PTFE , PTFE Impregnated |
| Ends | Lugged |
| Port | STANDARD [Round], Optional V Port, Diamond Port,. |
The Wafer Lug Type Butterfly Valve is made from different material types ranging from duplex steel to alloy steel and in ordinary austenitic stainless steels. The sizes and dimensions of the valves differ as well. They range from ½ inches to 48 inches with pressure capacities ranging up to 2500lbs. There are also rotary valves which belong to the family of butterfly valves.
| Orifice | DN25 to 300 |
| Body | Wafer, Lug (on request) |
| Body material | GG25 (GGG40 on request) |
| Disc material | 316 (other materials or coatings on request) |
| Seal material | EPDM (NBR, FKM on request) |
| Medium temperature | -10°C up to 120°C, (for EPDM - see Pressure/Temperature chart p. 2), Butterfly valves with different maximum pressure ratings on request |
| Medium pressure | max. 16 bar - in standard, (see Pressure/Temperature chart p. 2) |
| Port connections | EN1092-1 & EN1092-2 ASME/ANSI B16.1 Class 125 ASME/ANSI B16.5 Class 150, (see chart p. 4) |
| ISO top flange | EN ISO 5211 |
| Design | EN593 |
| Considered standards | ISO 5752 Serie 20, EN 558 Serie 20, API609 Chart 2 |
| Orifice [mm] | 10° | 20° | 30° | 40° | 50° | 60° | 70° | 80° | 90° |
| 25 | – | – | – | 3 | 8 | 16 | 27 | 35 | 40 |
| 32/40 | – | – | – | 5 | 12 | 25 | 40 | 56 | 62 |
| 50 | – | – | 1 | 8 | 18 | 33 | 54 | 71 | 79 |
| 65 | – | – | 6 | 19 | 41 | 76 | 118 | 158 | 174 |
| 80 | – | 3 | 18 | 43 | 79 | 138 | 211 | 252 | 275 |
| 100 | – | 15 | 38 | 83 | 154 | 253 | 368 | 458 | 496 |
| 125 | – | 20 | 61 | 134 | 249 | 399 | 599 | 792 | 883 |
| 150 | 5 | 37 | 100 | 200 | 374 | 600 | 863 | 1109 | 1212 |
| 200 | 15 | 76 | 200 | 399 | 680 | 1099 | 1666 | 2196 | 2500 |
| 250 | 40 | 150 | 333 | 621 | 1084 | 1765 | 2652 | 3517 | 3948 |
| 300 | 60 | 219 | 500 | 989 | 1736 | 2770 | 4097 | 5118 | 5635 |
| Orifice [mm] | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
| PN 6 | 10 | 10 | 10 | 10 | 10 | 20 | 22 | 40 | 45 | 100 | 200 | 280 |
| PN16 | 10 | 10 | 10 | 10 | 18 | 25 | 46 | 50 | 60 | 1151) / 180 2) | 280 | 430 |

| Orifice | A | B | C | D | E | F | G | H | I | ISO 5211 | K |
| 25 | 50 | 125 | 32 | 11 | 16 | 36 | 65 | 6.5 | 50 | F05 | 12 |
| 32 | 57 | 130 | 32 | 11 | 16 | 36 | 65 | 6.5 | 50 | F05 | 12 |
| 40 | 57 | 130 | 32 | 11 | 16 | 36 | 65 | 6.5 | 50 | F05 | 12 |
| 50 | 62 | 136 | 43 | 11 | 16 | 36 | 65 | 6.5 | 50 | F05 | 12 |
| 65 | 84 | 145 | 46 | 11 | 16 | 36 | 65 | 6.5 | 50 | F05 | 12 |
| 80 | 89 | 151 | 46 | 11 | 16 | 36 | 65 | 6.5 | 50 | F05 | 12 |
| 100 | 106 | 175 | 52 | 11 | 16 | 36 | 65 | 6.5 | 50 | F05 | 10 |
| 125 | 120 | 190 | 56 | 14 | 19 | 56 | 90 | 8.5 | 70 | F07 | 12 |
| 150 | 131 | 203 | 56 | 14 | 19 | 56 | 90 | 8.5 | 70 | F07 | 12 |
| 200 1) | 166 | 225 | 60 | 14 | 19 | 56 | 90 | 8.5 | 70 | F07 | 12 |
| 200 2) | 164 | 245.5 | 60 | 17 | 24 | 71 | 125 | 10.5 | 102 | F10 | 16 |
| 250 | 200 | 271 | 68 | 22 | 24 | 71 | 125 | 10.5 | 102 | F10 | 16 |
| 300 | 235 | 296 | 78 | 22 | 29 | 87 | 150 | 12.5 | 125 | F12 | 16 |
| Hydro Test Pressure | BODY:225 PSIG (16 KG/CM2)] SEAT: 165 PSIG (11.5 KG/CM2) |
| Size Range | 25 NB TO 1500 NB(1" to 60") |
Cast Iron Wafer Type Butterfly Valve
ASTM A216 Gr. WCB Lug And Wafer Type Butterfly Valve
Duplex 2205 Wafer Type Butterfly Valve
316 Stainless Steel Wafer Type Butterfly Check Valve
Carbon Steel Wafer Type Triple Offset Butterfly Valve
A217 Gr. WC9 Wafer Type Butterfly Valve

| Size | A | B | C | D | L | H | D1 | N-ø | K | E | n1-ø1 | ø2 | G | Torq Nm | W eight (Kg) | |
| mm | Inc h | |||||||||||||||
| 50 | 2” | 161 | 80 | 42 | 52.9 | 32 | 84.84 | 120 | 4-23 | 77 | 50 | 4-6.7 | 12.6 | 118 | 17 | 2.5 |
| 65 | 2.5” | 175 | 89 | 44.7 | 64.5 | 32 | 96.2 | 136.2 | 4-26.5 | 77 | 50 | 4-6.7 | 12.6 | 137 | 30 | 3.2 |
| 80 | 3” | 181 | 95 | 45.2 | 78.8 | 32 | 61.23 | 160 | 8-18 | 77 | 50 | 4-6.7 | 12.6 | 143 | 39 | 3.6 |
| 100 | 4” | 200 | 114 | 52.1 | 104 | 32 | 70.80 | 185 | 4-24.5 | 92 | 70 | 4-10.3 | 15.77 | 156 | 62 | 4.9 |
| 125 | 5” | 213 | 127 | 54.4 | 123.3 | 32 | 82.28 | 215 | 4-23 | 92 | 70 | 4-10.3 | 18.92 | 190 | 95 | 7 |
| 150 | 6” | 226 | 139 | 55.8 | 155.6 | 32 | 91.08 | 238 | 4-25 | 92 | 70 | 4-10.3 | 18.92 | 212 | 138 | 7.8 |
| 200 | 8” | 260 | 175 | 60.6 | 202.5 | 45 | 112.89 | 295 | 4-25 | 115 | 102 | 4-14.3 | 22.10 | 268 | 226 | 13.2 |
| 76.35 | 4-23 | |||||||||||||||
| 250 | 10” | 292 | 203 | 65.6 | 250.5 | 45 | 92.40 | 357 | 4-29 | 115 | 102 | 4-14.3 | 28.45 | 325 | 360 | 19.2 |
| 300 | 12” | 337 | 242 | 76.9 | 301.6 | 45 | 105.3 | 407 | 4-29 | 140 | 102 | 4-14.3 | 31.60 | 403 | 514 | 32.5 |
| 350 | 14” | 368 | 267 | 76.5 | 333.3 | 45 | 91.11 | 467 | 4-30 | 140 | 102 | 4-14.3 | 31.60 | 436 | 658 | 41.3 |
| 400 | 16” | 400 | 309 | 86.5 | 389.6 | 51.2 | 100.47 | 515 | 4-26 | 197 | 140 | 4-20.6 | 33.15 | 488 | 1017 | 61 |
| 72 | 102.4 | 525 | 4-30 | |||||||||||||
| 450 | 18” | 422 | 328 | 105.6 | 440.51 | 51.2 | 88.39 | 565 | 4-26 | 197 | 140 | 4-20.6 | 38 | 539 | 1485 | 79 |
| 72 | 91.51 | 585 | 4-30 | |||||||||||||
| 500 | 20” | 480 | 361 | 131.8 | 491.6 | 64.2 | 96.99 | 620 | 4-26 | 197 | 140 | 4-20.6 | 41.15 | 593 | 1833 | 128 |
| 82 | 101.68 | 650 | 4-33 | |||||||||||||
| 600 | 24” | 562 | 459 | 152 | 592.5 | 70.2 | 113.42 | 725 | 20-30 | 276 | 165 | 4-20.6 | 50.65 | 816 | 3320 | 188 |
| 82 | 120.46 | 770 | 20-36 | |||||||||||||
| 700 | 28” | 624 | 520 | 163 | 695 | 66 | 109.65 | 840 | 24-30 | 300 | 254 | 8-18 | 55 | 895 | 5142 | 484 |
| 82 | 20-36 | 63.35 | ||||||||||||||
| 800 | 32” | 672 | 591 | 188 | 794.7 | 66 | 124 | 950 | 24-33 | 300 | 254 | 8-18 | 55 | 1015 | 7404 | 368 |
| 82 | 24-39 | 63.35 | ||||||||||||||
| 900 | 36” | 720 | 656 | 203 | 864.7 | 118 | 117.57 | 1050 | 24-33 | 300 | 254 | 8-18 | 75 | 1115 | 713 | |
| 1000 | 40” | 800 | 721 | 216 | 965 | 142 | 129.89 | 1160 | 24-36 | 300 | 254 | 8-18 | 85 | 1230 | 864 | |
| COMPONENT | MATERIAL | SPECIFICATION | |
| 1 | Body | Ductile iron | ASTM A536 65-40-18, ASTM A536 65-45-12 (GGG40) |
| 2 | Shaft | Stainless steel | AISI 420 |
| Stainless steel | ASTM A351 CF8 (AISI 304) | ||
| Stainless steel | ASTM A351 CF8M (AISI 316) | ||
| 3 | Disc | ||
| Ductile iron | ASTM A536 65-40-18, ASTM A536 65-45-12 (GGG40) | ||
| Aluminum Bronze | C954/C958 | ||
| 4 | Seat | EPDM / NBR / VITON | Commercial |
| 5 | Bearing | PTFE | Commercial |
| 6 | Seal | EPDM / NBR | Commercial |
| 7 | Coating | NBR | Commercial |
| DN | A | B | L | Ø K | ISO 5211 | n - Ø N |
| 50 | 64 | 102 | 43 | 65 | 50 | 4 - Ø 10 |
| 65 | 72 | 113 | 46 | 65 | 50 | 4 - Ø 10 |
| 80 | 88 | 123 | 46 | 65 | 50 | 4 - Ø 10 |
| 100 | 105 | 152 | 52 | 90 | 70 | 4 - Ø 10 |
| 125 | 119 | 152 | 56 | 90 | 70 | 4 - Ø 10 |
| 150 | 130 | 165 | 56 | 90 | 70 | 4 - Ø 10 |
| 200 | 163 | 206 | 60 | 125 | 102 | 4 - Ø 10 |
| 250 | 200.5 | 253 | 68 | 125 | 102 | 4 - Ø 12 |
| 300 | 235.5 | 277 | 78 | 125 | 102 | 4 - Ø 12 |
| 350 | 256 | 310 | 78 | 150 | 125 | 4 - Ø 12 |
| 400 | 315 | 340 | 102 | 175 | 140 | 4 - Ø 18 |
| 450 | 330 | 375 | 114 | 175 | 140 | 4 - Ø 18 |
| 500 | 348 | 425 | 127 | 175 | 140 | 4 - Ø 18 |
| 600 | 438 | 505 | 154 | 210 | 165 | 4 - Ø 23 |
| DN | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 |
| Weight (Kg) | 2.5 | 3.2 | 3.6 | 4.9 | 7 | 7.8 | 13.2 | 19 | 32.5 | 42.5 | 52 | 87 | 98 | 133 |
| Factor Cv | 115 | 196 | 302 | 600 | 1022 | 1579 | 3136 | 5340 | 8250 | 11917 | 16388 | 21705 | 27908 | 43116 |
| Operating torque butterfly valves (N·m) | DN | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | |
| PN6 | Wet | 12.7 | 13.4 | 20.4 | 33.1 | 51.4 | 80.2 | 145 | 232 | 343 | 434 | 565 | 742 | 965 | 1494 | |
| Dry | 20.2 | 25.4 | 38.7 | 60.5 | 89.3 | 141 | 250 | 394 | 559 | 650 | 848 | 1113 | 1447 | 2241 | ||
| PN10 | Wet | 13.9 | 15.4 | 21.7 | 37.1 | 57.9 | 93.9 | 173 | 286 | 429 | 550 | 755 | 1012 | 1350 | 2111 | |
| Dry | 21.1 | 29.2 | 41.1 | 67.8 | 101 | 165 | 297 | 486 | 699 | 825 | 1133 | 1518 | 2025 | 3166 | ||
| PN16 | Wet | 15.1 | 17.2 | 23.1 | 39.8 | 61.9 | 102 | 192 | 323 | 490 | 625 | 846 | 1131 | 1431 | 2301 | |
| Dry | 24.2 | 32.7 | 43.7 | 72.8 | 108 | 174 | 330 | 549 | 799 | 969 | 1307 | 1787 | 2288 | 3711 | ||
| Working temperature | 10°C to 120°C for EPDM -10°C to 85°C for NBR |