KEYSTONE Keystone Series GR Resilient Seated Butterfly Valves GRF Sizes DN 600-1800 Pentair reserves the right to change the contents without notice KEYCB-6278-EN-1304 The Keystone Series GRF is a heavy duty double flanged concentric design resilient seated butterfly valve aimed at general purpose applications. Features • 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: KIWA, ABS, ACS, NSF/ANSI STD 61. General application These valves are for water or air service where a drop-tight shut-off and double flanged body are required. Technical data Pressure (bar) : 10 bar DN 600-1800 End of line (bar) : 6 bar DN 600-1800 Vacuum service (bar) : 0.4 bar Temperature (°C) : -40 to +160 Sizes (DN) : 600-1800 Flange accommodation : PN 10 ASME 125/150 AWWA C207 Table B/D/E JIS 10K AS4087 PN 16 AS2129 Table D/E Flange facing : Flat face (standard) Raised face (option) www.pentair.com/valves
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KEYSTONE
Keystone Series GR Resilient Seated Butterfly ValvesGRF Sizes DN 600-1800
Pentair reserves the right to change the contents without notice KEYCB-6278-EN-1304
The Keystone Series GRF is a heavy duty double flangedconcentric design resilient seated butterfly valve aimedat general purpose applications.
Features• Double flanged body design with face-to-
face dimensions, according to EN 558Series 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 leakagethrough shaft area to atmosphere.
• A secondary shaft sealing provides back-upsafety.
• A molded-in O-ring in the seat for flangesealing eliminates the need for gaskets.
• Shaft seals prevent moisture penetratinginto the shaft area.
• Rounded polished disc edge gives fullconcentric sealing, lower torques, longerseat life and drop-tight shut-off.
• Extended body neck allows for pipeinsulation.
• Top and bottom shaft bearings foroptimized support and minimum frictionand decreased torque.
• Top bushing absorbs actuator side thrustloads.
• All valves comply to Pressure EquipmentDirective (97/23/EU) Module B1 + D, CEMarking.
• Available approvals: KIWA, ABS, ACS,NSF/ANSI STD 61.
General applicationThese valves are for water or air servicewhere a drop-tight shut-off and doubleflanged body are required.
Technical dataPressure (bar) : 10 bar DN 600-1800End of line (bar) : 6 bar DN 600-1800Vacuum service (bar) : 0.4 bar Temperature (°C) : -40 to +160Sizes (DN) : 600-1800
Keystone Series GR Resilient Seated Butterfly ValvesGRF Sizes DN 600-1800
Pentair reserves the right to change the contents without notice page 4
Notes:(1) ‘Q’ dimension is the minimum allowable pipe or flange inside diameter at the centered body face to protect the disc sealing edge against damage
when opening the valve.(2) Weight may vary depending on trim materials used.
Valve dimensions (mm)
Top plate drilling Tap
Size Shaft Bolt No. Holes depth Adapt. Weight (2)
(DN) A B C D E F J L M N Q (1) T YY G Key circle holes α dia. U code (kg)
Keystone Series GR Resilient Seated Butterfly ValvesGRF Sizes DN 600-1800
Pentair reserves the right to change the contents without notice page 5
DN 1050-1800
Valve dimensions (mm)
Shaft Top plate drilling Tap
Size Key Bolt No. Holes depth Adapt. Weight (2)
(DN) A B C D E F J L M N P Q (1) R T YY G Key length circle holes α dia. U code (kg)
Notes:(1) ‘Q’ dimension is the minimum allowable pipe or flange inside diameter at the centered body face to protect the disc sealing edge against damage
when opening the valve.(2) Weight may vary depending on trim materials used.
Application IClean liquid lubricating media (water, clean oils, lube oil, mineral oil, etc.); and with no deposit orchemical attack, valve operated at least once a week.Temperature range from 0°C to maximum temperature rating of the elastomer seat.
Application IIOther liquid media and lubricating gases (aqueous liquids, such as food & beverage, water, etc.);and with minor deposit or chemical attack, valve operated at least once a month.Temperature range from 0°C to maximum temperature rating of the elastomer seat.
Application IIIa. Dry non-abrasive media or gases (non-abrasive powders and dry gas); orb. Fluids with moderate deposit or chemical attack; orc. Valves operated less than once a month.Temperature range from 0°C to maximum temperature rating of the elastomer seat.
Application IVa. Dry abrasive media and degreasing applications (sand, cement, silicone free, oxygen cleaned); orb. Liquids with severe deposit; orc. Valves not frequently operated (once a year).All above with temperature range from -10°C to maximum temperature rating of the elastomer seat.
Notes:1. For applications with temperatures above or below the guidelines above, please consult factory.2. For dry service valves it is suggested to use U/C discs (reduced diameter) when service
conditions are less than 3.5 bar.
Keystone Series GR Resilient Seated Butterfly ValvesGRF Sizes DN 600-1800
Pentair reserves the right to change the contents without notice page 6
Notes:3.5 U/C refers to reduced diameter disc option.(1) Use a minimum of Class 8.8 steel bolts to connect actuator to valve.(2) Duplex shaft not suitable for these conditions, use only 431 stainless steel or super duplex.
SeatE – EPDM (Food grade) N – NBR (Food grade) F – FKM (1)
Flange drillingA1 – ASME 125/150 J2 – JIS 10K AD – AS4087 PN 16 (AS2129 Table D)D2 – DIN PN 10 AW – AWWA C207 Table B/D/E AE – AS2129 Table E
Mounting (2)
K – Keystone mount (for DN 600-900) I – ISO 5211 (for DN 1000-1800)
ActuationB0 – Bare shaft C1 – Chainwheel P2 – Pneumatic SRG1 – Gear P1 – Pneumatic DA E – Electric
Special (If none leave blank)UC – Under cut disc for 3.5 bar or less pressure P – Special body coating NP – Non PED certifiedNSF – NSF/ANSI STD 61 MTR – Material certifications
Note:(1) FKM available in size up to DN 1000 only(2) Valves in size DN 600-900 are Keystone topplate mounting
Valves in size DN 1000-1800 are ISO 5211 topplate mounting