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Figure 55 Butterfly Valve
Brand: KeystoneDouble flanged valve design for services in the water treatment industry.
Features- The centric disc offers bidirectional service and allows with its symmetric shape high Kv (Cv) values.
- Dry shaft design.
- The inside body is protected by a bonded rubber liner extending over the flanges.
- Primary stem sealing by preloaded contact between flatted seat surface and rounded polished disc-hub area exceeds the pressure rating of the valve and prevents leakage through shaft area to atmosphere.
- A secondary sealing is provided by the interference fit between shaft and shafthole in seat at all positions.
- Dirtscraper prevents moisture penetrating into the shaft area.
- Bubble-tight shut off at full pressure rating.
- Rounded, polished disc edge provides concentric sealing.
- Actuator flange acc. ISO 5211.
- Double flanged body design per EN 558 series 13 (short), series 14 (long) on request.
- Excellent performance in media with sedimentation and contamination.
- Suitable for severe vacuum applications and up to 16 bar (230 psi) drop tight shut off.
Specifications
Brand
Applications
- Wastewater Treatment, Air Circulation, Wastewater Collection, Water Distribution, Water Treatment
Approvals & Certifications
- PED
Body Design
- Long Pattern, Short Pattern
Material
- Buna-N, Cast Iron, Ductile Iron, EPDM Rubber
Media
- Water, Liquids, Air, Inert Gas, Air
Operating Temperature
- Up to 250° F (120° C)
Pressure Class
- ASME , PN
Process Connection Type
- Class 150 RF, PN 16
Seat / Seal Type
- Resilient
Shutoff Class
- Zero Leakage
Stem
- O-Ring
Valve Size
- NPS 24 / DN 600, NPS 4 / DN 100, NPS 6 / DN 150, NPS 8 / DN 200, NPS 16 / DN 400, NPS 20 / DN 500, NPS 12 / DN 300, NPS 14 / DN 350, NPS 18 / DN 450
Valve Size Standard
- DN, NPS
Valve Type
- Butterfly
- Waterwork Industries Where A Double Flanged Valve Is Required.
- Fire Fighting Systems.
- Sea Water Applications.
- For Drinking Water Applications