Lug Type Wafer Butterfly Valve
Lug Type Wafer Butterfly Valve
Item Number:
Lug type wafer butterfly valve is a type of valve that is designed to regulate flow in pipelines. It is a straightforward valve that consists of a disc, seat, stem, and actuator. The valve is mounted between two flanges using bolts and nuts, and it is designed to be able to accommodate bi-directional flow. When the valve is closed, the disc seals against the seat, blocking the flow of fluid through the pipeline. When the valve is open, the disc rotates away from the seat, allowing fluid to flow freely through the pipeline. The lug type wafer butterfly valve is a popular choice for many applications due to its simplicity, low cost, and high flow capacity.
Material of main parts
| Part Name | Material |
| Body | Cast Iron,Ductile Iron,WCB,Stainless Steel,Bronze |
| Seat | NBR,EPDM,VITON,PTFE |
| Disc | Ductile Iron,WCB,304 CF8,316 CF8M,AI-bronze C958 |
| Stem | SS416,SS304,SS316 |
| End Connection | Lug |
| Operate | Manual,Worm gear,Pneumatic,Electric-Motorized |
| Disc Type | With-pin,One stem no-pin,Double stem no-pin |
Valve Design
| Technical Specification | |
| Valve Design | GB/T12238,API609,MSS SP-67 |
| Face to Face | GB/T12221,API609,MSS SP-67,DIN3202,BS EN558-1 |
| Pressure Test | GB/T13927,API598 |
| Flange Drilling | GB/T17241.6,ASI B16.1 Class125,BS4504 PN10/PN16 DIN2501 PN10/PN16 |
| Top Flange | It can be customized to 5211 standard |
Main external and connecting dimensions(mm)
| DN | NPS | A | B | C | D | L | H | D1 | n-M | E | n1-φ2 | φ2 | G | J | X | f |
| 50 | 2 | 161 | 80 | 43 | 52.9 | 32 | 88.38 | 125 | 4-M16 | 57.15 | 4-6.7 | 12.6 | 155 | 13.8 | 3 | 13 |
| 65 | 2 1/2 | 175 | 89 | 46 | 64.5 | 32 | 102.54 | 145 | 4-M16 | 57.15 | 4-6.7 | 12.6 | 179 | 13.8 | 3 | 13 |
| 80 | 3 | 181 | 95 | 45.21 | 78.8 | 32 | 61.23 | 160 | 8-M16 | 57.15 | 4-6.7 | 12.6 | 190 | 13.8 | 3 | 13 |
| 100 | 4 | 200 | 114 | 52.07 | 104 | 32 | 68.88 | 180 | 8-M16 | 69.85 | 4-10.3 | 15.77 | 220 | 17.77 | 5 | 13 |
| 125 | 5 | 213 | 127 | 55.5 | 123.3 | 32 | 80.36 | 210 | 8-M16 | 69.85 | 4-10.3 | 18.92 | 254 | 20.92 | 5 | 13 |
| 150 | 6 | 226 | 139 | 55.75 | 155.6 | 32 | 91.84 | 240 | 8-M20 | 69.85 | 4-10.3 | 18.92 | 285 | 20.92 | 5 | 13 |
| 200 | 8 | 260 | 175 | 60.58 | 202.5 | 45 | 112.89 | 295 | 8-M20 | 88.9 | 4-14.3 | 22.1 | 339 | 24.1 | 5 | 13 |
| 76.35 | 12-M20 | |||||||||||||||
| 250 | 10 | 292 | 203 | 68 | 250.5 | 45 | 90.59 | 350 | 12-M20 | 88.9 | 4-14.3 | 28.45 | 406 | 31.45 | 8 | 13 |
| 91.88 | 355 | 12-M24 | ||||||||||||||
| 300 | 12 | 337 | 242 | 68 | 301.6 | 45 | 103.52 | 400 | 12-M20 | 107.95 | 4-14.3 | 31.6 | 477 | 34.6 | 8 | 20 |
| 106.12 | 410 | 12-M24 | ||||||||||||||
| 350 | 14 | 386 | 267 | 76.9 | 333.3 | 45 | 89.74 | 460 | 16-M20 | 107.95 | 4-14.3 | 31.6 | 515 | 34.6 | 8 | 20 |
| 91.69 | 470 | 16-M24 | ||||||||||||||
| 400 | 16 | 400 | 325 | 85.7 | 389.6 | 51.2 | 100.48 | 515 | 16-M24 | 158.75 | 4-20.6 | 33.15 | 579 | 36.15 | 10 | 20 |
| 72 | 102.42 | 525 | 16-M27 | |||||||||||||
| 450 | 18 | 422 | 345 | 104.6 | 440.5 | 51.2 | 88.38 | 565 | 20-M24 | 158.75 | 4-20.6 | 37.95 | 627 | 41 | 10 | 20 |
| 72 | 91.51 | 858 | 20-M27 | |||||||||||||
| 500 | 20 | 480 | 378 | 130.26 | 491.6 | 57 | 96.99 | 620 | 20-M24 | 158.75 | 4-20.6 | 41.15 | 696 | 44.15 | 10 | 22 |
| 82 | 101.68 | 650 | 20-M30 | |||||||||||||
| 600 | 24 | 562 | 475 | 151.36 | 592.5 | 70.2 | 113.42 | 725 | 20-M27 | 215.9 | 4-22.2 | 50.65 | 821 | 54.65 | 16 | 22 |
| 82 | 770 | 20-M33 |