Soft Back Seat WCB/SS Wafer Butterfly Valve
Features of WCB Wafer Butterfly Valve
The main difference between soft back seat wafer butterfly valve and hard back seat wafer butterfly valve is the seat material:
- 1. Compared with the hard-backed valve seat, the soft-backed valve seat has a wider contact surface with the pipe flange, and the installation and sealing performance is better, without the need for a special flange for butterfly valves;
- 2. The soft-backed valve seat is highly replaceable and does not require any special tools. The replacement can be completed;
- 3. The wall thickness of the hard-backed valve body is relatively thin, and the valve body is easily deformed. The wall thickness of the soft-backed valve body is larger than that of the hard-backed valve body, and the valve body is heavier. The different shape designs prevent the valve body from deforming. Deformation.
- 4. The vulcanization process of the soft-backed valve seat is more perfect, and there will be no phenomenon of immature rubber of the hard-backed valve seat. The rubber performance is more reliable.
- 5. The soft-backed butterfly valve has small torque.
WCB Wafer Butterfly Valve Parts
| Parts | Ductile Iron type | WCB type | Stainless Steel Type | Duplex Stainless Steel Type |
|---|---|---|---|---|
| Body | Cast Iron(GG25) Ductile Iron(GGG40/50) |
A216 A217 A105(forged) |
SS304/ CF8 SS316/CF8M SS304L/CF3 SS316L/CF3M |
2205 2507 1.4529 |
| Disc | Ductile Iron with Ni coated Ductile Iron with nylon coated Ductile Iron with PTFE/EPDM lined Stainless Steel Duplex Stainless Steel Bronze |
SS304/ CF8 SS316/CF8M SS304L/CF3 SS316L/CF3M 2205 2507 1.4529 |
2205 2507 1.4529 |
|
| Seat | NBR, EPDM, PTFE, Viton, Hypalon, Silicon, PFA | |||
| Stem | SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel | Duplex Stainless Steel, Monel | ||
| Actuator | Hand Lever, Worm Gear, Electric, Pneumatic | |||
WCB Wafer Butterfly Valve Standards
| ITEM | Standard |
| Design | EN593 | API609 |
| Face to Face | EN558 | ISO5752 | API608 | BS5155-4 |
| Top Flange | ISO5211 |
| Flange Drilling | PN6 | PN10 | PN16 | ASME B16.5 CL150 | JIS 10K |
| Pressure Rating | PN6 | PN10 | PN16 | PN25 | CL150 | JIS 10K |
| Tightness Test | ISO5208 | API598 | EN12266-1 |
Paraments of WCB Wafer Butterfly Valve
| SIZE | D1 | D2 | D3 | N×φD | α° | F | G | A | B | C | E |
| DN50(2″) | 52.6 | 100 | 120.6 | 4×19 | 45 | 52 | 266.7 | 273 | 161 | 43 | 32 |
| DN100(4″) | 104 | 156 | 190.5 | 8×19 | 22.5 | 52 | 266.7 | 346 | 200 | 52.1 | 32 |
| DN150(6″) | 155.6 | 212 | 241.3 | 8×22. | 422.5 | 52 | 266.7 | 397 | 226 | 55.8 | 32 |
| DN200(8″) | 202.4 | 264 | 298.4 | 8×22. | 422.5 | 52 | 359 | 485 | 260 | 60.6 | 45 |
| SIZE | øK | 4-ød0 | øD | øD1 | øD2 | L | L1 | H1 | H2 | H3 | øD3 | øD4 | n-ød1 | □ | H4 | W1 | W2 | øW3 | |||||||
| PN6 | PN10 | PN16 | CL150 | PN6 | PN10 | PN16 | CL150 | ||||||||||||||||||
| DN200 | 8〞 | 280 | 295 | 295 | 298.5 | 4-ø19 | 4-ø23 | 4-ø23 | 4-ø22.3 | 246 | 194 | 202 | 60 | 64 | 235 | 86 | 487 | 125 | 102 | 4-012 | □17 | 35 | 75 | 238 | 300 |
| DN250 | 10〞 | 335 | 350 | 355 | 362 | 4-ø19 | 4-ø23 | 4-ø28 | 4-ø25.4 | 301.5 | 241 | 250 | 68 | 72 | 270 | 86 | 553 | 125 | 102 | 4-ø12 | □22 | 35 | 75 | 238 | 300 |
| DN300 | 12〞 | 395 | 400 | 410 | 431.8 | 4-ø23 | 4-ø23 | 4-ø28 | 4-ø25.4 | 352 | 290 | 301 | 78 | 83 | 310 | 118 | 658 | 25 | 102 | 4-ø12 | □22 | 35 | 81 | 227 | 300 |
| DN350 | 14〞 | 445 | 460 | 470 | 476.3 | 4-ø23 | 4-ø23 | 4-ø28 | 4-ø28.6 | 390 | 325.4 | 333.3 | 78 | 83 | 360 | 118 | 733 | 150 | 125 | 4-ø14 | □22 | 35 | 81 | 227 | 300 |
| DN400 | 16〞 | 495 | 515 | 525 | 539.8 | 4-ø23 | 4- ø 28 | 4-ø31 | 4-ø28.6 | 452 | 377 | 387 | 102 | 106 | 380 | 150 | 821 | 175 | 140 | 4-018 | □27 | 50 | 115 | 278 | 300 |
| DN500 | 20〞 | 600 | 620 | 650 | 635 | 4-ø23 | 4-ø28 | 4-ø34 | 4-ø31.8 | 564 | 480 | 491.6 | 127 | 132 | 470 | 150 | 981 | 175 | 140 | 4-ø18 | □27 | 50 | 115 | 278 | 300 |
| DN600 | 24〞 | 705 | 725 | 770 | 749.3 | 4-ø26 | 4-ø31 | 4-ø37 | 4-ø35 | 649.5 | 579.9 | 592.5 | 153 | 159 | 495 | 180 | 1120 | 210 | 165 | 4-022 | □36 | 60 | 144 | 304 | 300 |
EPDM Coated Wafer Butterfly Valve Applications
- Water and Wastewater Management: Used to control the flow of raw and treated water.
- Drinking Water Systems: EPDM valve seats ensure a sanitary, leak-proof seal and are suitable for drinking water pipes.
- Irrigation Systems: Effectively control water flow in agricultural irrigation pipes.
- HVAC Systems: Suitable for chilled water and hot water systems in pipes.
- Fire Protection Systems: In sprinkler systems, it is often used as an isolation valve or flow control valve in fire water supply systems.
- Food and Beverage Industry: EPDM valve seats are non-toxic and resistant to water-based liquids, making this valve suitable for food processing (excluding oil-based products).
- Chemical Processing: Low-corrosive chemical systems, suitable for systems conveying weak acidic or alkaline solutions that are compatible with EPDM.
- Power Plants: Cooling Water Systems, for cooling water flow management.
WCB Wafer Butterfly Valve Manufacture Process
WCB Wafer Butterfly Valve Certificates
WRAS
CE
ISO 9001
EAC Russia
