Wafer Butterfly Valves
The wafer butterfly valves are designed with a body lining of rubber vulcanization. The end of the rubber vulcanization adopt water line to fulfil various forms of the flange sealing requirements.
The wafer butterfly valves have a simple and compact construction, they are small in size and in weight, easy to install and maintain.
The design is made to maintain a seal against bi-directional pressure. There is no leaking under rated pressure.
Suitable medium: fresh water, waste liquid, seawater, vapor, food, medicine, oils, Acids, Alkalis, Salts, etc.
PRESSURE TEMPERATURE RATINGS
| Working pressure | 16bar/25bar |
|---|---|
| Testing Pressure | Shell:24bar/37.5bar Seal:17.6bar/27.5bar |
| Working Temperature | -20 to 110 EPDM Seat -10 to 80 NBR Seat |
| Suitable Media | Water, Oil&Gas |
WAFER BUTTERFLY VALVES MATERIALS LIST
| Part | Material | ASTM |
|---|---|---|
| Body | Cast Iron Ductile Iron | A126 Class B A536 Gr. 65-45-12 |
| Disc | Ductile Iron Bronze Stainless Steel 304 Stainless steel 316 | A536 Gr. 65-45-12 B148 C95400 A351 CF-8 A351 CF-8M |
| Shaft | Stainless Steel 410 Stainless Steel 431 | A276 S 410 00 A276 S 431 00 |
| Seat Ring | EPDM / NBR | |
| O-Ring | EPDM / NBR | |
| Bushing | PTFE Bronze | B62 C83600 |
Concentric Wafer Butterfly Valve
Features
– Replaceable Rubber Seat With Phenolic Backed
– High Axiality of Pinned Shaft
– Low Pressure Loss
– Fusion Bonded Epoxy Powder Coating
Design Standard
– BS EN 593/MSS SP-67/
– API 609/ISO 5752/BS 5155
Working Pressure
- 16 Bar
CONCENTRIC WAFER BUTTERFLY VALVE MATERIALS LIST
| Part | Material | Specification |
|---|---|---|
| Body | Ductile Iron | A536 Gr.65-45-12 |
| Disc | Ductile Iron Stainless Steel |
A536 Gr.65-45-12 A351 CF8/CF8M |
| Shaft | Stainless Steel | A276 410 |
| Seat | EPDM/NBR/VITON | - |
| O-Ring | EPDM/NBR/VITON | - |
| Pin | Stainless Steek | A276 316/416 |
| Bushing | PTFE/PAP | - |
| Lever | Malleable Iron | - |
| Gear Box Housing | Cast Iron | - |
