SLV
Center-Line Butterfly Valve
Concentric (center-line) resilient-seated butterfly valve with wafer body and ISO 5211 top flange, DN40–DN1000, for water, wastewater, HVAC, food, textile, power and shipping.
Specifications
| Size range | DN40 ~ DN1000 (1.5" ~ 40") |
|---|---|
| Connection type | wafer |
| Top flange | ISO 5211 |
| Leakage class | RATE A EN 12266-2 (zero leakage) |
| Drive | handle, handwheel, electric, pneumatic |
Materials
| Valve body | gray cast iron / ductile cast iron / carbon steel / stainless steel |
|---|---|
| Valve disc | Ni Al alloy / ductile cast iron / SS 304 / SS 316 / duplex stainless steel / super austenitic stainless steel / Hastelloy alloy |
| Valve stem | SS 410 / SS 304 / SS 316 / SS 630 |
| Valve seat | NBR / EPDM / PTFE / VITON / FKM / silicone rubber |
Seat temperature
| EPDM | -29°C ~ +121°C |
|---|---|
| FKM | -18°C ~ 204°C |
| NBR | -18°C ~ 100°C |
| Polyurethane | -29°C ~ 80°C |
Standards
| Design standard | ISO 5208, AWWA C504, ASME B16.34 |
|---|---|
| Face to face | API 609, ISO 5752 |
| Wall thickness | AWWA C504, ASME B16.34 |
| Pressure test | ISO 5208 |
