Keystone Series GRF Butterfly Valves - imperial0 pages

Keystone Series GR Resilient Seated Butterfly Valves
GRF
A heavy duty double flanged concentric design resilient seated butterfly valve

Features

General application

Technical data

These valves are for water or air service where
a drop-tight shut-off and double flanged body
are required.

Pressure (psi):t
150 psi NPS 24-72
End of line (psi):t
90 psi NPS 24-72
Vacuum service (psia):t5.8 psia
Temperature (°F):t
-40 to +320
Sizes (NPS):t
24-72
Flange
accommodation:t
t
t
t
t
t
Flange facing:t
t

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• Double flanged body design with face-to-face
dimensions, according to EN 558 Series 20,
API 609 and AWWA C504 short.
• 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.
• Rounded polished disc edge gives full
concentric sealing, lower torques, longer seat
life and drop-tight shut-off.
• Extended body neck allows for pipe insulation.
• Top and bottom shaft bearings for optimized
support and minimum friction and decreased
torque.
• Top bushing absorbs actuator side thrust
loads.
• All valves comply to Pressure Equipment
Directive (97/23/EU) Module B1 + D, CE
Marking.
• Available approvals: ABS, NSF/ANSI STD 61.

PN 10
ASME 125/150
AWWA C207 Table B/D/E
JIS 10K
AS4087 PN 16
AS2129 Table D/E
Flat face (standard)
Raised face (option)

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KEYCB-6278-US-1403