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Series 20/21
Resilient Seated Butterfly Valve
Specifications
| Size Range | NPS 1 to 20 / DN 25 to 500 |
|---|---|
| Temperature Range | -20°F to 400°F (-29°C to 204°C) |
| Maximum Allowable Operating Pressure | 150 psi (10 Bar) |
| Shutoff Rating | Bidirectional Bubble-tight |
| Body Style | Wafer, Lug |
| Body Materials | Cast Iron, Ductile Iron, Stainless Steel, Aluminum |
| Stem Materials | Stainless Steel, EPDM Molded over Stainless Steel, BUNA-N Molded over Stainless Steel |
| Seat Materials | EPDM, BUNA-N, PTFE Lined EPDM, FKM, Polyurethane |
| Disc Materials | Stainless Steel, EPDM Molded over Stainless Steel, BUNA-N Molded over Stainless Steel |
| Flange Drilling | ASME B16.1 Class 125, ASME B16.5 Class 150, EN 1092 PN 10 |
| Certifications | ABS, ATEX, Bureau Veritas, DNV, NSF 61/372, PED, PE(S)R, SIL |
| Applications | Sanitary Service, Mildly Corrosive, Toxic Media |
Features & Benefits
The Series 20/21 resilient seated butterfly valve surpasses the high standards required in sanitary valve applications, and inherent flow characteristics and capabilities. Bray’s Series 20 valve is a wafer version with flange locating holes, and the Series 21 is the companion lug version for dead-end service and other flange requirements.
- Sanitary & Chemical applications
- One-piece disc/stem
- High Cv, low pressure drop