KEYSTONE

The Keystone Series GRF is a heavy duty double flanged concentric design resilient seated butterfly valve aimed at general purpose applications.

Features

General application

Keystone Series GR Resilient Seated Butterfly ValvesGRF Sizes NPS 24-72

www.pentair.com/valves Pentair reserves the right to change the contents without notice KEYCB-6278-US-1307

Technical data

11

14

13

12

16

3

15

1

15

9

7

8

4

2

6

5

10

Keystone Series GR Resilient Seated Butterfly ValvesGRF Sizes NPS 24-72

Pentair reserves the right to change the contents without notice page 2

Parts list

Item Description Qty

NPS 24-40

Material specification

Part name Material Material specification Remark

3

1

4

2

15

9

7

8

5

19

12

13

14

10

18

11

15

17

16

6

Keystone Series GR Resilient Seated Butterfly ValvesGRF Sizes NPS 24-72

Pentair reserves the right to change the contents without notice page 3

NPS 42-72

Parts list

Item Description Qty

Material specification

Part name Material Material specification Remark

Keystone Series GR Resilient Seated Butterfly ValvesGRF Sizes NPS 24-72

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Valve dimensions (in)

Top plate drilling Tap

Size Shaft Bolt No. Holes depth Adapt. Weight

(NPS) A B C D E F J L M N Q T YY G Key circle holes α dia. U code (lbs)

Notes:

NPS 24-40

a

PC

D

ØE

ØND

T

CF

ØG

J

L P

Q YY B

D

A M

R

Keystone Series GR Resilient Seated Butterfly ValvesGRF Sizes NPS 24-72

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NPS 42-72

Notes:

Valve dimensions (in)

Shaft Top plate drilling Tap

Size Key Bolt No. Holes depth Adapt. Weight (2)

(NPS) 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 (lbs)

Keystone Series GR Resilient Seated Butterfly ValvesGRF Sizes NPS 24-72

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Torque application factor categories

Application I

Application II

Application III

Application IV

Notes:

Notes:

Valve seating and unseating torques (in lbs)

Differential Valve size (NPS)

pressure (psi) 24 28 30 32 36 40 42 44 48 54 56 60 64 66 72

Application I

Application II

Application III

Application IV

Maximum allowable shaft torques (in lbs)

Valve size (NPS)

Shaft material 24 28 30 32 36 40 42 44 48 54 56 60 64 66 72

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Keystone Series GR Resilient Seated Butterfly ValvesGRF Sizes NPS 24-72

Flowrate co-efficients - Cv values

Size Disc opening (degrees)

(NPS) 10° 20° 30° 40° 50° 60° 70° 80° 90°

Note:

Possible flange drillings

Valve size (NPS)

Flange drilling 24 28 30 32 36 40 42 44 48 54 56 60 64 66 72

Pressure-temperature diagram

Seat Disc Body Size range Valve function Temperature (°F)

material * material material (NPS) Standard / End of Line -18 -4 5 32 122 212 248 266 302 320

Note:

Pentair reserves the right to change the contents without notice page 8

Keystone Series GR Resilient Seated Butterfly ValvesGRF Sizes NPS 24-72

Ordering information

Example: GR F 24 D 1 2 E A1 K B0 UC

GRF 24 D12E A1 K B0 UC

Series

GR

Body style

F

Size (NPS)

24 32 42 54 64

28 36 44 56 66

30 40 48 60 72

Body material

D N

Disc material

1 5

2 6

3 N

Shaft

2 6 7

Seat

E N F

Flange drilling

A1 J2 AD

D2 AW AE

Mounting

K I

Actuation

B0 C1 P2

G1 P1 E

Special

UC P NP

NSF MTR

Note: