Description
A flanged butterfly valve is a valve with flanges at the inlet and outlets sides. The flanges have holes used to secure bolts when connecting the valve to the pipe. A gasket is placed between the valve and pipe to enhance a tight seal.These valves operate by turning the disc for a quarter turn to start and stop fluid flow. The operation of the valve can be manual or it can be done using valve actuators. Butterfly valve flange types are stronger when compared to other types of butterfly valves.
The range of WESDOM valves can be used for overground installation, in valve chambers and buried systems.
Advantages of flanged butterfly valves :
①These valves can be operated manually or automatically.
②Butterfly valve flange types are small in size and light in weight compared to gate valve, check valve and globe valve.
③They are of compact and simple design.
④These valves can be used in both high-pressure and high-temperature applications depending on the valve seat material.
⑤Flanged butterfly valves are free from fluid leakage.
⑥They can be installed where space is limited, unlike other large-sized valves.
⑦These valves are used in shut-off and throttling fluid flow applications.
⑧These valves operate by making a quarter turn which makes their operations very fast.
⑨Flanged butterfly valves are easy to install, clean, and repair.
Troubleshooting flanged butterfly valves:
1)Valve is hard to operate
①Clogged materials inside the valve. Open the valve and remove such materials.
②Corroded internal parts. Open the valve and clean off any corrosion.
2）Internal fluid leakage
①Damaged seats. Replace the valve seats.
②Worn out O-rings. Replace the O-rings.
③Dirt in the valve. Open the valve and clean the dirt.
3）External fluid leakage
①High fluid pressure. Ensure the valve is working at the pressure level recommended by the flange butterfly valve manufacturer.
②Loose bolts. Tighten the bolts to the torque required by the flanged butterfly valve manufacturer.
③Worn out gasket. Replace the gasket.
④Worn out packing. Replace the packing.
Test/Approvals:
(1)Tested according to EN 12266.
(2)WRAS approved materials
Standards:
(1)EN 593
(2)Face-to-face dimension according to EN 558 Table 2 Basic Series 13
(3)Flange drilling to EN1092, PN10/16
| NO. | Part name | Material |
| 1 | Body | ASTM A536 65-45-12, WCB, CF8M Bonded with NBR or EPDM |
| 2 | Disc | ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, 1.4462 |
| 3 | Stem | SS420,SS431 |
| 4 | Screw | SS304 |
| 5 | Retainer | SS201 |
| 6 | Weather seal | NBR |
| 7 | Bearing | RPTFE with Graphite on I.D. |
| 8 | Lower Stem | SS420, SS431 |
| 9 | Bottom cover | Same as body |
| 10 | Bolt | SS304 |
| 11 | Screw | SS304 |
| DN | L | L1 | D | D1 | D3 | D4 | H1 | H2 | H3 | b | Z-ød | |||
| PN10 | PN16 | PN10 | PN16 | PN10 | PN16 | |||||||||
| 50 | 108 | 160 | 165 | 1665 | 125 | 125 | 70 | 50 | 83 | 130 | 60 | 18 | 4–18 | 4–18 |
| 65 | 112 | 160 | 186 | 185 | 145 | 145 | 70 | 50 | 93 | 140 | 60 | 18 | 4–18 | 4–18 |
| 80 | 114 | 160 | 200 | 200 | 160 | 160 | 70 | 50 | 100 | 150 | 60 | 20 | 8–18 | 8–18 |
| 100 | 127 | 160 | 220 | 220 | 180 | 180 | 90 | 70 | 110 | 165 | 60 | 20 | 8–18 | 8–18 |
| 125 | 140 | 160 | 250 | 250 | 210 | 210 | 90 | 70 | 123 | 180 | 60 | 22 | 8–18 | 8–18 |
| 150 | 140 | 160 | 285 | 285 | 240 | 240 | 90 | 70 | 143 | 200 | 60 | 22 | 8–22 | 8–22 |
| 200 | 152 | 210 | 340 | 340 | 295 | 295 | 125 | 125 | 171 | 230 | 72 | 24 | 8–22 | 12–22 |
| 50 | 165 | 210 | 390 | 405 | 350 | 355 | 125 | 125 | 203 | 270 | 72 | 24 | 12–22 | 12–26 |
| 300 | 178 | 210 | 440 | 460 | 400 | 410 | 150 | 140 | 230 | 320 | 75 | 26 | 12–22 | 12–26 |
| 350 | 190 | 210 | 50 | 520 | 460 | 470 | 150 | 140 | 260 | 350 | 75 | 26 | 16–22 | 16–26 |
| 400 | 216 | 320 | 565 | 580 | 515 | 525 | 175 | 165 | 300 | 390 | 126 | 28 | 16–26 | 16–30 |
| 450 | 222 | 320 | 615 | 640 | 565 | 585 | 175 | 165 | 335 | 428 | 126 | 30 | 20–26 | 20–30 |
| 500 | 229 | 320 | 670 | 715 | 620 | 650 | 210 | 254 | 373 | 450 | 126 | 32 | 20–26 | 20–33 |
| 600 | 267 | 340 | 780 | 840 | 725 | 770 | 210 | 254 | 430 | 520 | 127 | 34 | 20–30 | 20–36 |
| 700 | 292 | 380 | 895 | 910 | 840 | 840 | 300 | 254 | 470 | 600 | 167 | 36 | 24–30 | 24–36 |
| 800 | 318 | 380 | 1015 | 1025 | 950 | 950 | 300 | 254 | 523 | 662 | 167 | 36 | 24–30 | 24–39 |
| 900 | 330 | 400 | 1115 | 1125 | 1050 | 1050 | 300 | 254 | 589 | 710 | 193 | 40 | 28–33 | 28–39 |
| 1000 | 410 | 400 | 1230 | 1255 | 116 | 1170 | 300 | 254 | 656 | 780 | 193 | 42 | 28–36 | 28–42 |
| 1200 | 471 | 440 | 1405 | 1485 | 1340 | 1390 | 300 | 254 | 732 | 840 | 205 | 46 | 32–37 | 32–49 |
| 1400 | 530 | 440 | 1630 | 1685 | 1560 | 1590 | 300 | 254 | 840 | 905 | 212 | 50 | 36–37 | 36–49 |
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