Keystone Series GR Butterfly Valves
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.
Any questions?
Bernhard Witzelsteiner
Account Manager
Mob. +46 70 378 83 35
Fredrik Ekeroth
Solution Seller
Phone. +46 54-57 92 06
Fredrik Malmström
Solution Seller
Phone. +46 40-33 02 33
Anders Praem
Inside Sales Engineer
Phone. +45 2137 7759
Kenn Gerwien
Area Account Manager East
Phone. +45 2346 5513
Slawka Pedersen
Inside Sales Manager
Phone. +45 2137 7702
Henna Ketoja
Inside Sales Engineer
Mob. +358 400 612 124
Tommi Penttilä
Sales Manager Conventional Power
Phone. +358 207 416 208
| 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 |
- 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.
Visit us at:
Askalon AB, Nolgårdsvägen 11, SE-663 41 Hammarö, Sweden
Phone. +46 54-57 92 00, Email: sales@askalon.se
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