Home/Products/Keystone Series GR Butterfly Valves

Keystone Series GR Butterfly Valves

Any questions?

Bernhard Witzelsteiner
Account Manager
Mob. +46 70 378 83 35

Bernhard.Witzelsteiner@askalon.se

Fredrik Ekeroth
Solution Seller
Phone. +46 54-57 92 06

Fredrik.Ekeroth@askalon.se

Fredrik Malmström
Solution Seller
Phone. +46 40-33 02 33

Fredrik.Malmstrom@askalon.se

Anders Praem
Inside Sales Engineer
Phone. +45 2137 7759

Anders.Praem@askalon.dk

Kenn Gerwien
Account Manager
Phone. +45 2346 5513

Kenn.Gerwien@askalon.dk

Slawka Pedersen
Inside Sales Manager
Phone. +45 2137 7702

Slawka.Pedersen@askalon.dk

Henna Ketoja
Inside Sales Engineer
Mob. +358 400 612 124

Henna.Ketoja@askalon.fi

Tommi Penttilä
Sales Manager Conventional Power
Phone. +358 207 416 208
Mob. +358 40 512 2308

Tommi.Penttila@askalon.fi

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.

Keystone WATER & SEVAGE

Specifications
Features

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.

Brands

Keystone Series GR Butterfly Valves

Questions about the product?