Keystone Series GR Resilient Seated Butterfly Valves
GRF Sizes NPS 24-72
KEYSTONE
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 faceto-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.
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 (psi)
End of line (psi)
Vacuum service (psia)
Temperature (°F)
Sizes (NPS)
: 150 psi NPS 24-72
: 90 psi NPS 24-72
: 5.8 psia
: -40 to +320
: 24-72
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
Pentair reserves the right to change the contents without notice
KEYCB-6278-US-1307
Keystone Series GR Resilient Seated Butterfly Valves
GRF Sizes NPS 24-72
NPS 24-40
11
Parts list
14
10
13
12
16
3
15
4
2
Item
Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Body
Disc
Shaft
Seat
Disc screw
Disc screw O-ring
Plug
Plug circlip
Plug O-ring
Bushing
Body circlip
Shaft circlip
Body O-ring
Shaft O-ring
Bearing
Parallel key
1
6
5
15
9
7
8
Material specification
Part name
Material
Material specification
Body
Disc
Ductile iron
316 stainless steel
304 stainless steel
Duplex
Aluminium bronze
Nickel aluminium bronze
Ductile iron CTD
431 stainless steel
Duplex
Super duplex
EPDM
NBR
Fluoroelastomer (FKM)
Duplex
EPDM
NBR
Fluoroelastomer (FKM)
Carbon steel
Stainless steel
NBR
Polyester
Stainless steel
NBR
PTFE/steel
ASTM A536 Gr 65-45-12
ASTM A351 Gr CF8M - J92900
ASTM A351 Gr CF8 - J92600
ASTM A890 Gr 4A - J92205 - CD3MN
ASTM B148 C95200
ASTM B148 C95800
ASTM A536 Gr 65-45-12
ASTM A276 Gr 431 S43100
ASTM A276 - S31803
ASTM A276 - S32750
Shaft
Seat
Disc screw
Disc screw O-ring
Plug
Plug circlip
Plug O-ring
Bushing
Shaft/Body circlip
Shaft/Body O-ring
Bearing
Remark
CTD = Epoxy coated, max. temp. 250°F
(optional)
Food grade
Food grade
ASTM A276 - 531803
Pentair reserves the right to change the contents without notice
page 2
Qty
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
1
Keystone Series GR Resilient Seated Butterfly Valves
GRF Sizes NPS 24-72
NPS 42-72
10
14
13
6
12
16
17
18
3
11
1
15
4
2
5
Parts list
Item
Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Body
Disc
Shaft
Seat
Bottom shaft
Through bolt
Bottom cover
Bottom cover screw
Bottom cover O-ring
Bushing
Bushing cover
Shaft circlip
Body O-ring
Shaft O-ring
Bearing
Parallel key
Parallel key disc shaft
Bushing cover screw
Lock nut
Qty
1
1
1
1
1
1
1
4
1
1
1
1
1
1
4
1
2
4
1
15
9
7
8
19
Material specification
Part name
Material
Material specification
Body
Disc
Ductile iron
316 stainless steel
304 stainless steel
Duplex
Aluminium bronze
Nickel aluminium bronze
Ductile iron CTD
431 stainless steel
Duplex
Super duplex
EPDM
NBR
Stainless steel
Ductile iron
Steel class 8.8 - Zinc plated/coated
NBR
Polyester
Steel
Stainless steel
NBR
PTFE/steel
Steel class 8.8 - Zinc plated/coated
Steel class 8 - Zinc plated/coated
ASTM A536 Gr 65-45-12
ASTM A351 Gr CF8M - J92900
ASTM A351 Gr CF8 - J92600
ASTM A890 Gr 4A - J92205 - CD3MN
ASTM B148 C95200
ASTM B148 C95800
ASTM A536 Gr 65-45-12
ASTM A276 Gr 431 S43100
ASTM A276 - S31803
ASTM A276 - S32750
Shaft
Seat
Through bolt
Bottom cover
Bottom cover screw
Bottom cover O-ring
Bushing
Bushing cover
Shaft circlip
Shaft/Body O-ring
Bearing
Bushing cover screw
Lock nut
Remark
CTD = Epoxy coated, max. temp. 250°F
(optional)
Food grade
Food grade
ASTM A536 Gr 65-45-12
Pentair reserves the right to change the contents without notice
page 3
Keystone Series GR Resilient Seated Butterfly Valves
GRF Sizes NPS 24-72
NPS 24-40
4 blind holes threaded
Valve dimensions (in)
Top plate drilling
Tap
Size
(NPS)
A
B
C
D
E
F
J
L
M
24
28
30
32
36
40
23.03
26.93
28.89
30.85
34.79
38.74
32.48
36.42
39.17
41.73
46.26
50.79
19.69
22.44
23.82
25.20
28.15
30.71
6.06
6.50
6.50
7.48
7.99
8.50
8.27
8.27
8.27
11.81
11.81
13.78
4.25
4.25
4.25
5.51
5.51
5.08
17.97
20.41
21.69
22.95
25.94
27.80
0.24
0.24
0.24
0.24
0.24
0.24
25.64
29.67
31.91
33.76
37.67
42.63
N
Q (1)
T
YY
5.12
5.12
5.12
7.87
7.87
9.06
22.41
26.29
28.35
30.22
34.12
38.11
1.62
1.50
1.69
1.69
1.85
1.97
26.38
30.51
32.87
34.65
38.58
42.56
G
Shaft
Bolt
No. Holes
Key
circle holes
1.88
1/2 x 3/8
6.5
2.25
1/2 x 3/8
6.5
2.25
1/2 x 3/8
6.5
2.88 3/4 x 1/2
10.0
2.88 3/4 x 1/2
10.0
3.54 0.98 x 0.55 11.7
4
4
4
8
8
8
depth
Adapt. Weight (2)
α
dia.
U
code
(lbs)
45˚
45˚
45˚
22.5˚
22.5˚
22.5˚
0.87
0.87
0.87
0.69
0.69
0.87
1.57
1.57
1.57
1.89
1.89
1.89
DAJ
DAK
DAK
KAV
KAV
F30
500
646
772
948
1217
1614
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.
Pentair reserves the right to change the contents without notice
page 4
1137
1273,5
1416,5
1510
45
870
845
100
106
130
381
mm
1482
mmmm 1554
mmin
457
254
457
276
381
280
381
318
457
457
1664
110 0
1083
1785
120 0
1184
135 0
1327
140 0
1381
150 0
1482
160 0
1591
165 0
1664
180 0
1785
mm
1417
mm
1544
251
1015
1585
254
1038
1711
276
1137
381
1256
280
1338
381
1417
318
1544
457
1585
457
1711
1571,5
mm
mm
1680,5
1060
1149,5
1753,5
1083
1172,5
1874,5
1184
1273,5
1327
1416,5
1381
1470,5
1482
1571,5
1591
1680,5
1664
1753,5
1785
1874,5
mm
1855
mm
1910
1132
1345
2032
1155
1405
2195
1256
1510
1399
1685
1453
1745
1554
1855
1663
1910
1736
2032
1857
2195
47,
5
mm
mm
495
1015
42,
505
1038
42,
52
1137
45
1256
46
1338
46
1417
47,
5
1544
49
1585
50
1711
52
mm
1080
mm
1149,5
1150
780
1172,5
1185
815
1273,5
1290
870
1416,5
975
1470,5
1010
1571,5
1080
1680,5
1150
1753,5
1185
1874,5
1290
mm
989
mm
1038
1345
745
1082
1405
777
1209
1510
845
1685
895
1745
918
1855
989
1910
1038
2032
1082
2195
1209
mm
130
mm
42,
140
90 5
42,
140
1005
160
45
100
46
100
46
110
47, 5
130
49
140
50
140
52
160
mm
138
mm
148
780
95
148
815
106
169
870
106
975
106
1010
117
1080
138
1150
148
1185
148
1290
169
mm
165
mm
165
745
115
165
777
115
185
845
130
895
165
918
165
989
165
1038
165
1082
165
1209
185
ØN
PCD
No
α
°
22, 5
22, 5
22, 5
22, 5
22, 5
22, 5
22, 5
22, 5
22, 5
48
276
60
in
66
44
72
48
54
56
42-72
60
64
66
72
1184
1591
1663
GRF 64
Sizes318
24-72
105 0 1132
42
251NPS1060
42
30
230
45
260
260
F 45
P TopplateSize
N
mmmm
45 ISO521
2601
mm
260
115 45
F30
30
230
260
115 45
F30
30
230
300
130 54
F30
30
230
165 45
F30
260
165 45
F35
260
165 45
F35
260
165 45
F35
260
165 45
F35
260
185 54
F35
300
6
6
6LE
mm
6
mm
350
6
6
350
9
350
6
415
6
415
6
415
6
415
6
415
6
475
9
298
356
356
P
PCD
mm
356
mm
356
30
298
356
30
298
406
30
298
45
356
45
356
45
356
45
356
45
356
54
406
22, 5
22, 5
22,
PCD
α5
22,° 5
mm
298
22, 5
22, 5
298
298
22, 5
356
22, 5
356
22, 5
356
22, 5
356
22, 5
356
22, 5
406
22, 5
8
8
8
LNo
mm8
68
68
68
68
68
68
68
68
98
22
33
33dia
N
Hole
mm
33
mm
33
230
22
33
230
22
39
230
22
260
33
260
33
260
33
260
33
260
33
300
39
1025
1406
1421
Hole
dia
Weight
mm
1786
kg
1863
22
735
2243
22
855
2828
22
1025
33
1406
33
1421
33
1786
33
1863
33
2243
39
2828
Key width Key height Key length
mm
mm
mm
25
110
14
28
16
110
28
16
125
R
16
160
28
ØG
160
32
18
36
20
160
36
20
160
36
20
160
40
22
180
R
ØG
ØG
F
F
B
YY
A
M
B
B
Q
YY
YY
J
A
M
A
M
Q
Q
C
C
ØE
R
J
KEYSTONE
J
F
L
ØG
P
All information hereon is of a proprietary nature
confidential and the prop erty of Pen tair Valves &
Controls B.V. loaned to others for expres se d
purposes onl y and sh all not be reprodu ced or
disclosed wi thout written consen t of the comp any.
D
KEYSTONE
D
D
Shaft Top plate drilling
Tap
Size
Key
A
42 41.73
D
44 42.64
48 46.61
54 52.24
56 54.37
60 58.35
64 62.64
66 65.51
72 70.28
All information hereon is
confidential and the prop
Controls B.V. loaned to o
purposes onl y and sh all
disclosed wi thout written
J
Valve dimensions (in)
(NPS)
All information hereon is of a proprietary nature
confidential and the prop erty of Pen tair Valves &
Controls B.V. loaned to others for expres se d
purposes onl y and sh all not be reprodu ced or
disclosed wi thout written consen t of the comp any.
B
M
YY
A
C
KEYSTONE
Q
PCD
C
L
4 blind holes threaded
R
L
Weight
kg
735
855
1025
1406
1421
1786
1863
2243
2828
FP
8
8
8
8
8
8
8
8
8
L
Hole dia
mm
22
22
22
33
33
33
33
33 a
39
P
PCD
mm
298
298
298
356
356
356
356
356
406
ØE
L
mm
6
6
6
6
6
6
6
6
9
ØN
N
mm
230
230 a
230
260
260
260
260
260 a
300
PCD
P
mm
30
30
30
45
45
45
45
45
54
ØE
E
mm
350
350
350
415
415
415
415
415
475
D
TopplateSize
ISO521 1
F30
F30
F30
F30
F35
F35
F35
F35
F35
T
D
F
mm
115
115
130
165
165
165
165
165
185
P
8
2
9
R
mm
95
106
106
106
117
138
148
148
169
T
G
mm
90
100
100
100
110
130
140
140
160
ØN
T
D
1736
44
1155
1857
48
1256
54
1399
56
1453
60
1554
64
1663
66
1736
72
1857
F30
350
415
F30
F35
G
R 415
TopplateSize
E
mm
415
F35 1 mmmm
ISO521
F35
90
95 415
F30
350
F35
100
106415
F30
350
F35
100
106475
F30
350
100
106
415
F30
110
117415
F35
130
138415
F35
140
148415
F35
140
148415
F35
160
169475
F35
ØE
54
46
975
100
106
165
381
1327
1399
1685
895
1470,5
Keystone
Series
GR1256
56
1745
46
1010
110
165
280
1381
1338
918
117
DResilient
A
M Seated
YY
Q
JB
NPS
D
A DN 1453
MNPS
YY
B
TQ
CButterfly
GT Valves
RC
FJ
m
ØN
1256
PCD
120 0
135 0
140
DN0
150
mm0
160 0
105
165
110 0
180 0
120
135 0
140 0
NPS
150 0
160 0
165 0
180 0
B
C
D
E
F
J
L
M
KEYSTONE
52.95
55.32
59.45
66.34
68.70
73.03
75.20
80.00
86.42
30.71
32.09
34.25
38.39
39.76
42.52
45.28
46.65
50.79
9.88
10.00
10.87
15.00
11.02
15.00
12.52
17.99
17.99
13.78
13.78
13.78
16.34
16.34
16.34
16.34
16.34
18.70
4.53
4.53
5.12
6.50
6.50
6.50
6.50
6.50
7.28
29.33
30.59
33.27
35.24
36.14
38.94
40.87
42.60
47.60
0.24
0.24
0.24
0.24
0.24
0.24
0.24
0.24
0.35
44.57
45.47
49.45
55.08
57.21
61.18
65.47
68.35
73.11
N
P
Q (1)
9.06
9.06
9.06
10.24
10.24
10.24
10.24
10.24
11.81
1.18
1.18
1.18
1.77
1.77
1.77
1.77
1.77
2.13
39.96
40.87
44.76
49.45
52.68
55.79
60.79
62.40
67.36
All information hereon is of a proprietary nature
confidential and the prop erty of Pen tair Valves &
Controls B.V. loaned to others for expres sed
purposes onl y and sh all not be reprodu ced or
disclosed wi thout written consen t of the comp any.
R
3.74
4.17
4.17
4.17
4.61
5.43
5.83
5.83
6.65
T
YY
G
Key
1.67
1.67
1.77
1.81
1.81
1.87
1.93
1.97
2.05
45.26
46.16
50.14
55.77
57.89
61.87
66.16
69.04
73.80
3.54
3.94
3.94
3.94
4.33
5.12
5.51
5.51
6.30
0.98x0.55
1.10x0.63
1.10x0.63
1.10x0.63
1.26 x 0.71
1.42 x 0.79
1.42 x 0.79
1.42 x 0.79
1.58 x 0.87
Bolt
No. Holes depth Adapt.Weight (2)
length circle holes
4.33
4.33
4.92
6.30
6.30
6.30
6.30
6.30
7.09
11.73
11.73
11.73
14.02
14.02
14.02
14.02
14.02
15.98
8
8
8
8
8
8
8
8
8
α
dia.
U
code
(lbs)
22.5
22.5
22.5
22.5
22.5
22.5
22.5
22.5
22.5
0.87
0.87
0.87
1.30
1.30
1.30
1.30
1.30
1.54
1.67
1.67
1.77
1.81
1.81
1.87
1.93
1.97
2.05
F30
F30
F30
F35
F35
F35
F35
F35
F40
1620
1885
2260
3100
3133
3937
4107
4945
6235
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.
Pentair reserves the right to change the contents without notice
page 5
Keystone Series GR Resilient Seated Butterfly Valves
GRF Sizes NPS 24-72
Torque application factor categories
Application I
Clean liquid lubricating media (water, clean oils, lube oil, mineral oil, etc.); and with no deposit or
chemical attack, valve operated at least once a week.
Temperature range from 32°F to maximum temperature rating of the elastomer seat.
Application II
Other 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 32°F to maximum temperature rating of the elastomer seat.
Application III
a. Dry non-abrasive media or gases (non-abrasive powders and dry gas); or
b. Fluids with moderate deposit or chemical attack; or
c. Valves operated less than once a month.
Temperature range from 32°F to maximum temperature rating of the elastomer seat.
Application IV
a. Dry abrasive media and degreasing applications (sand, cement, silicone free, oxygen cleaned); or
b. Liquids with severe deposit; or
c. Valves not frequently operated (once a year).
All above with temperature range from -14°F 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 50 psi.
Valve seating and unseating torques (in lbs)
Differential
pressure (psi)
24
28
30
Valve size (NPS)
36
40
42
32
44
48
54
56
60
64
66
72
Application I
50
100
150
50 (U/C)
Application II
15043 22076
17518 26045
21007 31641
9026 13246
26264
31164
38074 (1)
15758
30933
36899
45315
18560
39137
46688
57340
23482
51608
62153
77033
30960
56893
68519
84924
34136
66429
80668
100766
39858
79048
95994
119912
47429
106048
129723
163148
63629
114045 145764
139507 180496
175453 229545
68427 87458
50
100
150
50 (U/C)
Application III
16617 24218
19059 28142
22498 33670
9970 14531
28723
33572
40404 (1)
17234
33731
39638
47966
20239
42679
50155
60695
25607
55980
66433
81175
33589
61713
73238
89491
37028
71720
85847
105778
43032
85344
102157
125876
51206
114016
137524
170697
68410
122615 155601 185482 197253 256125
147896 190126 227894 242357 317726
183572 238865 287777 306041 404726
73569
93361 111289 118352 153675
50
100
10
50 (U/C)
Application IV
18191 26361
20600 30239
23989 35700 (1)
10915 15817
31183
35979 (1)
42734 (1,2)
18710
36529
42378
50617 (2)
21918
46220
53622
64050
27732
60352
70713
85317
36208
66534
77957
94057
39920
77010
91027
110790
46206
91640
108321
131841
54984
121985
145325
178246
73191
131185
156286
191690
78711
50
100
10
50 (U/C)
20552
22912
26226
12331
34872
39591 (1)
46229 (1,2)
20923
40727
46487
54593 (2)
24436
51533
58823
69083
30920
66911
77134
91530
40147
73764
85035
100907
44259
84946
98795
118308
50967
101084
117566
140788
60650
133937 144039
157026 168870
189569 203868
80362 86423
180195 213465 227012 291540
214203 255288 271490 352396
262165 314287 334234 438277
108117 128079 136207 174924
44
48
56
29575
33385
38744 (1)
17745
174289 185350 241959
216937 230705 303858
277173 294764 391305
104574
111210 145175
165439 196675
199757 238852
248185 298381
99263 118005
209157
254010
317318
125494
270291
331594
418147
162175
Notes:
50 U/C refers to reduced diameter disc option.
(1) Use a minimum of ASTM A193 Grade B7 steel bolts to connect actuator to valve.
(2) Duplex shaft not suitable for these conditions, use only 431 stainless steel or super duplex.
Maximum allowable shaft torques (in lbs)
Shaft material
431SS (ASTM A276 - Gr 431 S43100)
Duplex (ASTM A276 - S31803)
Super duplex (ASTM A276 - S32750)
24
28
30
32
36
45010
33770
38640
55860
41900
47950
63100
47300
54150
62750
47050
53850
130500
97900
112000
Pentair reserves the right to change the contents without notice
Valve size (NPS)
40
42
167279
125459
143674
142187
106643
122043
174183
130637
149507
54
206045 308431
154534 231323
176856 264735
page 6
60
308431 397646
231323 298235
264735 341311
64
66
72
460947 460947 654247
345710 345710 490685
395646 395646 561562
Keystone Series GR Resilient Seated Butterfly Valves
GRF Sizes NPS 24-72
Flowrate co-efficients - Cv values
Size
(NPS)
24
28
30
32
36
40
42
44
48
54
56
60
64
66
72
10°
20°
30°
403
549
630
717
908
1120
1235
1355
1613
2041
2195
2520
2867
3049
3629
1034
1406
1614
1837
2325
2871
3164
3473
4133
5231
5625
6458
7347
7814
9299
2163
2945
3380
3846
4868
6008
6626
7272
8654
10953
11780
13523
15386
16362
19472
Disc opening (degrees)
40°
50°
3881
5282
6064
6899
8732
10780
11885
13044
15523
19647
21129
24255
27597
29349
34927
6577
8953
10277
11692
14799
18269
20143
22107
26309
33297
35809
41108
46771
49740
59195
60°
70°
80°
90°
10566
14382
16510
18784
23773
29351
31973
35090
41760
52853
56840
65250
74240
78953
93960
17021
23168
26595
30259
38297
47280
57815
63452
75514
95572
102782
117990
134246
142768
169906
30471
41474
47610
54170
68558
84640
99203
108876
129571
163989
176361
202455
230349
244971
291535
35356
48123
55243
62854
79550
98212
110823
121629
144749
183198
197019
226170
257331
273666
325685
Note:
Cv = The volume of water in U.S.gpm that will pass through a valve with a pressure drop of 1 psi at 60°F
Pressure-temperature diagram
Seat
Disc
Body
Size range
Valve function
material *
material
material
(NPS)
Standard / End of Line
Temperature (°F)
EPDM
all
DI
24-72
Std / EOL
NBR
all
DI
24-72
Std / EOL
FKM
all
DI
24-40
Std / EOL
-18
-4
5
32
122
212
248
266
302 320­
150 psi / 90 psi
150 psi / 90 psi
150 psi / 90 psi
90 psi / 60 psi
* all seat materials drop tight
Note: Valves with lower temperature rating of -40°F is available without PED certification.
Possible flange drillings
Valve size (NPS)
Flange drilling
EN 1092-2
24
28
PN 10
30
32
36
40
42
N/A
44
ISO 2084
PN 10
N/A
ASME B16.5
Class 150
See B16.47A
ASME B16.1
Class 125
ASME B16.47A Class 150
AWWA C207
Table B/D/E
MSS SP44
Class 150
N/A
10K
N/A
N/A
54
56
N/A
60
64
N/A
66
72
N/A
N/A
N/A
N/A
N/A
N/A
N/A
See B16.5
ASME B16.47B Class 150
JIS B2210
48
N/A
N/A
N/A
N/A
N/A
N/A
O
O
N/A
O
O
O
N/A
O
O
O
O
N/A
O
O
N/A
N/A
O
O
O
N/A
N/A
JIS B2210
5K
O
N/A
AS2129
Table D
N/A
N/A
N/A
N/A
AS4087
PN 16
N/A
N/A
N/A
AS2129
Table E
N/A
N/A
N/A
Notes:
Standard possible for all versions
O
N/A
Optional, contact factory
Not applicable
Data is valid for flat face flanges. For raised face, please consult factory
Pentair reserves the right to change the contents without notice
page 7
Keystone Series GR Resilient Seated Butterfly Valves
GRF Sizes NPS 24-72
Ordering information
Example:
GR
F
24
D
1
2
E
A1
NPS 24 Series GR Flanged, Ductile iron body,
316SS disc, 431SS shaft, EPDM seat,
ASME 125/150, Keystone mount, bare shaft, U/C disc
GRF 24 D12E A1 K B0 UC
Series
GR
Body style
F – Flanged
Size (NPS)
24
28
30
32
36
40
42
44
48
54
56
60
64
66
72
Body material
D – Ductile iron ASTM A536
N – Ductile iron ASTM A395
Disc material
1 – 316 stainless steel
2 – 304 stainless steel
3 – Aluminum bronze
5 – Ductile iron / Epoxy ctd.
6 – Duplex
N – Nickel aluminium bronze
Shaft
2 – 431 stainless steel
6 – Duplex
7 – Super duplex
N – NBR (Food grade)
F – Fluoroelastomer (FKM) (1)
Seat
E – EPDM (Food grade)
Flange drilling
A1 – ASME 125/150
D2 – DIN PN 10
Mounting
J2 – JIS 10K
AW – AWWA C207 Table B/D/E
AD – AS4087 PN 16 (AS2129 Table D)
AE – AS2129 Table E
(2)
K – Keystone mount (for NPS 24-36)
I – ISO 5211 (for NPS 40-72)
Actuation
B0 – Bare shaft
G1 – Gear
C1 – Chainwheel
P1 – Pneumatic DA
P2 – Pneumatic SR
E – Electric
Special (If none leave blank)
UC – Under cut disc for 50 psi or less pressure
NSF – NSF/ANSI STD 61
P – Special body coating
MTR – Material certifications
NP – Non PED certified
Note:
(1) Fluoroelastomer (FKM) available in size up to NPS 40 only
(2) Valves in size NPS 24-36 are Keystone topplate mounting
Valves in size NPS 40-72 are ISO 5211 topplate mounting
Pentair reserves the right to change the contents without notice
page 8
K
(2)
B0
UC