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Standard Series 31H Butterfly Valves
CONTROLS
Sizes 2” - 12” (50mm - 300mm) • Dimensions
R
Series 31H Lug
Retaining Ring Thrust Washer Stem Retainer Bushing Packing Stem Disc
Seat Body
IMPERIAL DIMENSIONS: Inches
A
B
2 21/2 3 4 5 6 8 10 12
3.69 4.19 4.88 6.06 7.12 8.12 10.50 12.75 14.88
1.62 1.75 1.75 2.00 2.12 2.12 2.50 2.50 3.00
C
D
E
2.00 2.84 5.50 2.50 3.34 6.00 3.00 4.03 6.25 4.00 5.16 7.00 5.00 6.16 7.50 5.75 7.02 8.00 7.75 9.47 9.50 9.75 11.47 10.72 11.75 13.47 12.25
F 3.54 3.54 3.54 3.54 3.54 3.54 5.91 5.91 5.91
BC 2.76 2.76 2.76 2.76 2.76 2.76 4.92 4.92 4.92
No of Hole Holes Diameter
4 4 4 4 4 4 4 4 4
.39 .39 .39 .39 .39 .39 .57 .57 .57
G
H
J
K
L
Adapter Code
Valve Size
Lug Bolting Data
Top Plate Drilling
Weight (lbs)
.55 .55 .55 .63 .75 .75 .87 1.18 1.18
39 .39 .39 .43 .51 .51 .63 .87 .87
1.25 1.25 1.25 1.25 1.25 1.25 1.25 2.00 2.00
1.32 1.91 2.55 3.57 4.63 5.45 7.45 9.53 11.47
2.30 2.57 2.81 4.09 4.61 5.06 6.05 7.69 9.02
A A A B C C D E E
7.0 8.0 9.0 15.0 20.0 23.0 42.0 66.0 88.0
Bolt Circle
No of Holes
4.75 4 5.50 4 6.00 4 7.50 8 8.50 8 9.50 8 11.75 8 14.25 12 17.00 12
Threads ISO Coarse
.62-11 .62-11 .62-11 .62-11 .75-10 .75-10 .75-10 .88-9 .88-9
Note: K dimension is disc chordal dimension at valve face.
METRIC DIMENSIONS: Millimeters
Lug Bolting Data
A
B
C
D
E
F
50 65 80 100 125 150 200 250 300
94 106 124 154 181 206 267 324 378
2 2 2 2 2 2 3 3 3
51 64 76 102 127 146 197 248 298
72 85 102 131 156 178 241 291 342
140 152 159 178 191 203 241 272 311
90 90 90 90 90 90 150 150 150
Top Plate Drilling BC
No of Holes
Hole Diameter
70 70 70 70 70 70 125 125 125
4 4 4 4 4 4 4 4 4
10 10 10 10 10 10 14 14 14
G
H
J
K
L
14 14 14 16 19 19 22 30 30
10 10 10 11 13 13 16 22 22
32 32 32 32 32 32 32 51 51
34 49 65 91 118 138 189 242 291
58 65 71 104 117 129 154 195 229
Adapter Code
Valve Size
Weight (Kg)
Bolt Circle
No of Holes
Threads ISO Coarse
A A A B C C D E E
3 3.6 4.1 7 9 10 19 30 40
121 140 152 191 216 241 298 362 432
4 4 4 8 8 8 8 12 12
.62-11 .62-11 .62-11 .62-11 .75-10 .75-10 .75-10 .88-9 .88-9
Note: K dimension is disc chordal dimension at valve face.
SR Drawing #31H-2/12-im
Drawings are for reference only. Please refer to Bray ES drawings on the Bray website, www.bray.com. Bray reserves the right to change product dimensions without notice.
Customer/Project: ____________________________________
Inquire/P.O. No.:_____________________________________ Bray Order No.: ____________________________________
January - 2015
Pg. 11
Standard Series 31H Butterfly Valves
CONTROLS
Sizes 14” - 20” (350mm - 500mm) • Dimensions
R
Series 31H Lug
Retaining Ring Thrust Washer Stem Retainer Bushing Packing Stem Disc
Seat Body
IMPERIAL DIMENSIONS: Inches
Lug Bolting Data
A
B
C
D
E
F
14 16 18 20
16.94 19.06 21.12 23.25
3.00 4.00 4.25 5.00
13.25 15.25 17.25 19.25
15.28 17.41 19.47 21.59
13.62 14.75 16.00 17.25
5.91 5.91 8.27 8.27
BC 4.92 4.92 6.50 6.50
No of Hole Holes Diameter
4 4 4 4
.57 .57 .81 .81
G
J
Key Size
1.38 1.38 1.97 1.97
2.00 2.00 2.50 2.50
.39x.39 .39x.39 .47x.39 .47x.39
K
L
13.04 9.93 14.85 11.30 16.85 12.16 18.73 14.00
Adapter Code
Valve Size
Top Plate Drilling
Weight (lbs)
Bolt Circle
No of Holes
Threads ISO Coarse
F F G G
114 166 226 305
18.75 21.25 22.75 25.00
12 16 16 20
1.00-8 1.00-8 1.12-7 1.12-7
Note: K dimension is disc chordal dimension at valve face.
METRIC DIMENSIONS: Millimeters
Lug Bolting Data
A
B
C
D
E
F
350 400 450 500
430 484 536 591
76 102 108 127
337 387 438 489
388 442 495 548
346 375 406 438
150 150 210 210
BC
No of Holes
Hole Diameter
125 125 165 165
4 4 4 4
14 14 21 21
G
J
Key Size
K
L
35 35 50 50
51 51 64 64
10x10 10x10 12x10 12x10
331 377 428 476
252 287 309 356
Adapter Code
Valve Size
Top Plate Drilling
Weight (Kg)
Bolt Circle
No of Holes
F F G G
52 75 103 138
476 540 578 635
12 16 16 20
Threads ISO Coarse
1.00-8 1.00-8 1.12-7 1.12-7
Note: K dimension is disc chordal dimension at valve face.
SR Drawing #31H-14/20-im
Drawings are for reference only. Please refer to Bray ES drawings on the Bray website, www.bray.com. Bray reserves the right to change product dimensions without notice.
Customer/Project: ___________________________________
Inquire/P.O. No.:_____________________________________ Bray Order No.: ____________________________________
January - 2015
Pg. 12
