Fermer
Keystone Series GR Butterfly Valve
Product Description
The Keystone Series GR is a general purpose resilient seated butterfly valve available in flanged, lugged or wafer body style for any service where drop-tight shut-off and maximum flow area is required.
Produits
Butterfly Valves
Butterfly Valves
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Caractéristiques
- Wafer and lugged body design with face-to-face dimension, according to EN 558 Series 20 and API 609.
- Designed according to EN 593 and API 609.
- The seat is field replaceable and fully isolates the body and shaft from the flow.
- Primary shaft sealing exceeds the pressure rating of the valve and prevents leakage through shaft area to atmosphere.
- A secondary shaft sealing provides back-up safety.
- A molded-in O-ring in the seat for flange sealing eliminates the need for gaskets.
- Shaft seals prevent moisture penetrating into the shaft area.
- The two piece shaft allows for a thin disc and provides minimal obstruction to flow (up to DN 300/ NPS 12).
- Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life and drop-tight shut-off.
- Body locating holes allow ease of installation and centering between the flanges.
- Extended body neck allows for pipe insulation.
- Top and bottom shaft bearings for optimized support and minimum friction and decreased torque.
Spécifications
- Sizes:
- DN 50 - 900 (NPS 2 - 36)
- Pressure:
-
16 bar DN 50 - 300 (230 psi NPS 2 - 12)
10 bar DN 350 - 900 (150 psi NPS 14 - 36)
- Reinforced seat:
- 16 bar DN 350 - 600 (230 psi NPS 14 - 24)
- End of line:
-
10 bar DN 50 - 300 (150 psi NPS 2 - 12)
6 bar DN 350 - 900 (90 psi NPS 14 - 36)
- Reinforced seat:
- 10 bar DN 350 - 600 (150 psi NPS 14 - 24)
- Vacuum service:
- 0.4 bar (5.8 psia)
- Temperature:
- `-40°C to +160°C (-40 °F to +320°F)
- Flange accommodation:
- PN 6/10/16, 125/150, JIS 10K, BS Table E, AS4087 PN 16, AS2129 Table E
Documentation et schémas
Pièces et accessoires
