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Keystone Series GR Butterfly Valves

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Henna Ketoja
Inside Sales Engineer
Mob. 400 612 124

Tommi Penttilä
Sales Manager Conventional Power
Phone. 0207 416 208
Mob. 040 512 2308

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.

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Ominaisuudet

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.

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Keystone Series GR Butterfly Valves

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