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DOUBLE ECCENTRIC BUTTERFLY VALVES
 

HIGH PERFORMANCE BUTTERFLY VALVES
 
DOUBLE ECCENTRIC BUTTERFLY VALVES
 
 
BUTTERFLY VALVES
BUTTERFLY VALVES
BUTTERFLY VALVES
Model - 91
  
Model - 91L
DESIGN STD : API 609 TESTING STD : API 598
Test Pressure in bar (psi)
Class
150
Hyd. Shell
30 (435)
Seat
223(319)
Air Seat
6.9 (100)
Test Pressure in bar (psi)
Class
300
Hyd. Shell
76 (1102)
Seat
55(798)
Air Seat
6.9 (100)
 
Dimensions are in mm (inch)
Class 150,   91 & 91L

SIZE
mm (inch)

A
B
C
D
d3)
E
← Wt1) Class →
91
91L
50 (2)
43 (1.7)
164 (6.5)
93 (3.7)
62 (2.4)
41 (1.6)
29 (1.1)
5.5 (12)
7.5 (17)
65 (2 1/2)
46 (1.6)
181 (7.1)
99 (3.9)
75 (3.0)
52 (2)
29 (1.1)
6 (13)
8 (18)
80 (3)
48 (1.9)
208 (8.2)
120(4.7)
92 (3.6)
60 (2.4)
29 (1.1)
8 (18)
10 (22)
100 (4)
54 (2.1)
234 (9.2)
135 (5.3)
114 (4.5)
80 (3.1)
30 (1.2)
11 (24)
14 (31)
125 (5)
57 (2.2)
238 (9.4)
142 (5.6)
134 (5.3)
111 (4.4)
30 (1.2)
12 (26)
14 (31)
150 (6)
57 (2.2)
254 (10)
175 (6.9)
158 (6.2)
135 (5.3)
30 (1.2)
16 (35)
20 (44)
200 (8)
64 (2.4)
305 (12)
185 (7.3)
214 (8.4)
180 (7.1)
60 (2.4)
36 (79)
45 (99)
250 (10)
71 (2.8)
340 (13.4)
225 (8.9)
260 (10.2)
225 (8.9)
75 (3)
55 (121)
62 (137)
300 (12)
81 (3.2)
380 (15)
265 (10.4)
314 (12.4)
285 (11.2)
85 (3.3)
70 (154)
84 (185)
350 (14)
92 (3.6)
415 (16.3)
300 (11.8)
354 (13.9)
310 (12.2)
85 (3.3)
70 (154)
84 (185)
400 (16)
102 (4)
445 (17.5)
325 (12.8)
399 (15.7)
356 (14)
120 (4.7)
140 (309)
204 (450)
450 (18)
115 (4.5)
505 (19.9)
355 (14)
454 (17.9)
406 (16)
90 (3.5)
180 (397)
360 (794)
500 (20)
128 (5)
545 (21.5)
380 (15)
494 (19.4)
454 (17.9)
135 (5.3)
230 (507)
456 (1005)
600 (24)
154 (6.1)
640 (25.2)
450 (17.7)
584 (23)
538 (21.2)
125 (4.9)
350 (772)
552 (1217)
 
Dimensions are in mm (inch)
Class 300,  91L
SIZE-
mm /inch
A
B
C
D
d3
E
Wt1)
50 /2
43 /1.7
164 /6.5
93 /3.7
62 /2.4
41 /1.6
29 /1.1
9 /20
65/ 21/2
46 /1.8
181 /7.1
99 /3.9
75 /3.0
52 /2.0
29 /1.1
11/24
80 /3.0
48 /1.9
208 /8.2
120 /4.7
92 /3.6
60 /2.4
29 /1.1
13 /29
100 /4.0
54 /2.1
234 /9.2
135 /5.3
114 /4.5
80 /3.1
30 /1.2
18 /40
125 /5
57 /2.2
274 /10.8
142 /5.6
134 /5.3
111 /4.4
30 /1.2
24 /53
150 /6
59 /2.3
290 /11.4
175 /6.9
158 /6.2
135 /5.3
65 /2.6
40 /88
200 /8
73 /2.9
335 /13.2
210 /8.4
214 /8.4
180 /7.1
75 /3.0
60 /132
250 /10
83 /3.3
370 /14.6
240 /9.4
264 /10.4
220 /8.7
85 /3.3
95 /209
300 /12
92 /3.6
445 /17.5
285 /11.2
314 /12.4
285 /11.2
90 /3.5
130 /287
350 /14
117 /4.6
480 /18.9
315 /12.4
354 /13.9
302 /11.9
90 /3.5
180 /397
400 /16
133 /5.2
510 /20.1
355 /14.0
399 /15.7
350 /13.8
140 /5.5
315 /694
450 /18
149 /5.9
550 /21.7
385 /15.2
454 /17.9
396 /15.6
120 /4.7
390 /860
500 /20
159 /6.3
610 /24.0
420 /16.5
494 /19.4
441 /17.4
150 /5.9
550 /1213
600 /24
181 /7.1
690 /27.2
490 /19.3
584 /23.0
526 /20.7
150 /5.9
725 /1598
 
Materials
Body
Steel ASTM A216 Gr.WCB / Stainless SteelASTM A351 Gr. CF8 / CF8M / CN7M
Disc
Stainless Steel ASTM A351 Gr. CF8 / CF8M / CN7M
Seat
PTFE / RPTFE / ASTM A240 TYPE 316 / INCONEL
Stem
Steel ASTM A276 TYPE 410 / 304 / 316 / A-20
Stem Bearings
PTFE / RPTFE / ASTM A439 TYPE D2 Ni-Resist
Handle Unit 4)
Carbon Steel / S.G. Iron
Gear Unit 4)
Gear in S.G.Iron / EN8 and Worm in EN19
Surface Protection for Cast Carbon Steel Valves
Prime coat : Chlorine free with modified alkyd resin unobjectionable in physiological and toxicological respects. Additional exernal coating : Heat resistant silver streak asluminium paint.
 
Cv Values (Full Open)
TORQUE VALUES Nm(ft.lbs) 100% ∆P
     
PTFE SEAL
METAL TO METAL &
FIRE SAFE VALVES
SIZE
CLASS150
CLASS 300
CLASS150
CLASS300
CLASS150
CLASS300
50 / 2
100
100
35 / 26
68 / 50
78 / 58
110 / 81
65 / 2.5
150
150
40 / 30
80 / 59
88 / 65
160 / 118
80 / 3
242
242
49 / 36
89 / 66
93 / 69
177 / 131
100 / 4
488
488
69 / 51
128 / 95
133 / 98
245 / 181
125 / 5
740
740
103 / 76
195 / 144
133 / 98
245 / 181
150 / 6
1260
1260
157 / 116
295 / 218
241 / 178
442 / 326
200 / 8
200
2200
314 / 232
569 / 420
452 / 334
824 / 608
250 / 10
3420
3200
451 / 333
814 / 601
618 / 456
1128 / 833
300 / 12
5100
4500
628 / 464
1138 / 840
1236 / 912
2237 / 1651
350 / 14
6300
5800
1207 / 891
2178 / 1607
1540 / 1137
2796 / 2064
400 / 16
8200
7200
1570 / 1159
2845 / 2100
1933 / 1427
3532 / 2607
450 / 18
10500
9500
2100 / 1550
3826 / 2824
3002 / 2216
5445 / 4018
500 / 20
14000
12700
2698 / 1991
4905 / 3620
3728 / 2751
6769 / 4996
600 / 24
21600
19500
3924 / 2896
7358 / 5430
5935 / 4380
10791 / 7964
 
1) Nett in Kg.(lbs.) approx. (without obligation) 2) Grade according to Working Pressure, Temperature & Service conditions. 3) Internal diameter of pipe should be atleast 3mm (0.1") (For Sizes 50 (2") - 300 (12") and 6 mm (0.2") (for Sizes 350 (14") - 500 (20") and 13 mm (0.5") (for Size 600 (24") more than 'd' 4) Gear Actuators mandatory for Sizes 200 (8") & above in Class 150 Valves & for Sizes 150 (6") & above in Class 300 Valves.* Please Specify Working Pressure, Temperature & Service conditions. * Valves can be supplied to suit ASME / BS / DIN Flanges.* Fire safe Valves incorporates primary PTFE & secondary Metal Seat & Ni-Resist Steel Stem bearing.* For Fire safe Services only Model 91 L is recommended. * Other Materials not mentioned above available on request.
 
DOUBLE OFFSET
  
FIRE SAFE
HIGH TEMPERATURE SERVICES
The axis of the disc rotation is double offset to the seat.
When the disc rotates it unseats at a small turning angle by its cam effect. This outstanding feature enables.
• Bubble tight shut-off over
extended period of service.
• Greatly reduced seat wear.
• Reduced torque peak experienced with conventional valves.

A Secondary lip type, pressure assisted, metal seat gives BI-DIRECTIONAL sealing once the PTFE seat burns away after the fire.
CERTIFIED BY LLOYDS REGISTER OF INDUSTRIAL SERVICES. AS PER API 607

4th EDITION.

Combination of seat and disc materials suitable up to 6000C (11120F) Seat Leakage Rate

Class IV As per FCI 70-2.
spherical disc
metal seat
metal seat
 
PRESSURE / TEMPERATURE RATINGS
 
DOUBLE ECCENTRIC BUTTERFLY VALVES
DOUBLE ECCENTRIC BUTTERFLY VALVES
 
 
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