Description
Model
Specification
Features & Benefits
Model
Resilient Seated Butterfly Valve
- Series 301
- Series 311
Specification
Size Range
- NPS 2 to 20 / DN 50 to 500
- NPS 14 to 20 / DN 350 to 500
Body Materials
- Cast Iron, Ductile Iron, Carbon Steel, Aluminum
Temperature Range
- -20°F to 400°F (-29°C to 204°C)
Stem Materials
- Stainless Steel, Monel K500
Maximum Allowable Operating Pressure
- 175 psi (12 Bar)
- 150 psi (10 Bar)
Seat Materials
- BUNA-N,
- EPDM,
- Polyurethane
Shutoff Rating
- Bidirectional Bubble-tight
Disc Materials
- Nylon 11 Coated Ductile Iron,
- Aluminum Bronze, Stainless Steel, Hastelloy®,
- Halar® Coated Ductile Iron
Body Style
- Wafer, Lug
Design Standard
- MSS SP-67,
- API 609,
- Category A
Flange Drilling
- ASME B16.1 Class 125,
- ASME B16.5 Class 150,
- EN 1092 PN 10, 16
Testing Standard
- MSS SP-61,
- API 598,
- EN 12266-1
Certifications
- ABS,
- ATEX,
- Bureau Veritas,
- CRN,
- DNV,
- FDA 21 CFR 177.1550,
- NSF 61/372,
- PED, PE(S)R
Face To Face
- MSS SP-67,
- API 609,
- Category A, EN 558
Applications
- Potable Water,
- Wastewater,
- Seawater,
- HVAC
Features & Benefits
- The Skywell Series 301 Wafer and Series 311 Lug style resilient seated butterfly valves feature a one-piece body with a high-strength through stem design utilizing an internal disc to stem connection.
- The Series 301/311 is engineered to provide bidirectional bubble-tight shutoff and isolation of the line media from the stem or valve body.
- Available with a wide selection of high-quality resilient seat & disc materials for a variety of applications, our Series 301/311 butterfly valves are easily automated for on-off or modulating service.
