| Specifications |
| SIZE RANGE |
1 to 20 (25mm to 500 mm) |
| BURST PRESSURE RANGE |
30 psig to 580 psig (2.0 barg to
40 barg) |
| TEMPERATURE RANGE |
-330 to 930F (-200 to 500C) |
| MAXIMUM OPERATING RATIO |
95% |
| FRAGMENTATION ON BURST |
Non-fragmenting design |
| RELIEF VALVE ISOLATION |
Excellent |
| VACUUM SERVICE |
Suitable |
| FLUID COMPATIBILITY |
Gas, vapor or gas cap only |
| TORQUE-SENSITIVE |
No |
| CYCLE LIFE |
Excellent |
| MATERIAL RANGE |
Good |
| REVERSAL RATIO |
Not applicable with offset tag and
System-Loc |
| DAMAGE RATIO |
<1 (fail-safe) |
| LEAK TIGHTNESS |
Excellent |
| PERFORMANCE TOLERANCE |
5%*(with no manufacturing range) |
Pressure and Solutions Intelligence
Elfab is an ISO 9001:2000 Certified Company and all Elfab’s
rupture discs are manufactured in-house to the highest standards.
To ensure the correct performance of a rupture disc, it must
be used in its correct holder, as specified by the rupture
disc manufacturer.
As the temperature seen by a rupture disc changes its burst
pressure and performance will change. As a result of extensive
testing, Elfab can advise on these changes, or on other technical
matters, such as discharge requirements, material selection,
corrosion resistance, customized designs and burst detection.
Specifications and Performance
| BURST PRESSURE
RANGE in psig (barg) at 68 °F (20 °C) |
| Nominal Size |
Nickel |
Stainless Steel/ Inconel |
| inches |
mm |
min |
max |
min |
max |
| 1 |
25 |
116 (8.0) |
435 (30) |
290 (20) |
580 (40) |
| 1 ½ |
40 |
72.5 (5.0) |
435 (30) |
218 (15) |
435 (30) |
| 2 |
50 |
58 (4.0) |
435 (30) |
145 (10) |
435 (30) |
| 2 ½ |
65 |
58 (4.0) |
363 (25) |
145 (10) |
392 (27) |
| 3 |
80 |
58 (4.0) |
290 (20) |
145 (10) |
363 (25) |
| 4 |
100 |
43.5 (3.0) |
218 (15) |
116 (8.0) |
363 (25) |
| 6 |
150 |
36.3 (2.5) |
203 (14) |
87 (6.0) |
290 (20) |
| 8 |
200 |
36.3 (2.5) |
189 (13) |
72.5 (5.0) |
218 (15) |
| 10 |
250 |
29 (2.0) |
174 (12) |
72.5 (5.0) |
218 (15) |
| 12 |
300 |
29 (2.0) |
174 (12) |
43.5 (3.0) |
218 (15) |
| 14 |
350 |
29 (2.0) |
145 (10) |
36.3 (2.5) |
174 (12) |
| 16 |
400 |
29 (2.0) |
116 (8.0) |
36.3 (2.5) |
145 (10) |
| 18 |
450 |
29 (2.0) |
102 (7.0) |
36.3 (2.5) |
116 (8.0) |
| 20 |
500 |
29 (2.0) |
87 (6.0) |
29 (2.0) |
116 (8.0) |
| PERFORMANCE
TOLERANCE (ZERO MANUFACTURING DESIGN RANGE) |
| Burst Pressure |
Tolerance |
| Entire Range |
+/- 5% |
| STANDARD TEMPERATURE
RANGE °F (°C) |
| Material |
Minimum |
Maximum |
| Stainless Steel |
-112 (-80) |
900 (480) |
| Inconel |
-112 (-80) |
1112 (600) |
| Nickel |
-112 (-80) |
750 (400) |
| FREE FLOW AREA
/ MINIMUM NET FLOW AREA (MNFA) |
| Nominal Size |
| inches |
mm |
in2 |
mm2 |
| 1 |
25 |
0.79 |
507 |
| 1 ½ |
40 |
1.95 |
1257 |
| 2 |
50 |
3.14 |
2027 |
| 2 ½ |
65 |
5.14 |
3319 |
| 3 |
80 |
7.79 |
5027 |
| 4 |
100 |
12.57 |
8108 |
| 6 |
150 |
27.39 |
17674 |
| 8 |
200 |
48.70 |
31420 |
| 10 |
250 |
76.10 |
49094 |
| 12 |
300 |
109.58 |
70695 |
| 14 |
350 |
149.15 |
96224 |
| 16 |
400 |
194.80 |
125680 |
| 18 |
450 |
246.55 |
159064 |
| 20 |
500 |
304.38 |
196375 |
| HOLDER DIMENSIONS |
| Nominal Size B |
Height C |
Outside Diameter
A |
| inches |
mm |
inches |
mm |
ANSI |
BS EN 1092 |
| 1 |
25 |
2.28 |
58 |
150 to 600lb |
PN 6 to 50 |
| 1 ½ |
40 |
2.36 |
60 |
150 to 600lb |
PN 6 to 50 |
| 2 |
50 |
2.36 |
60 |
150 to 600lb |
PN 6 to 50 |
| 2 ½ |
65 |
2.60 |
66 |
150 to 600lb |
PN 6 to 50 |
| 3 |
80 |
2.68 |
68 |
150 to 600lb |
PN 6 to 50 |
| 4 |
100 |
2.83 |
72 |
150 to 600lb |
PN 6 to 50 |
| 6 |
150 |
3.11 |
79 |
150 to 600lb |
PN 6 to 50 |
| 8 |
200 |
3.58 |
91 |
150 to 600lb |
PN 6 to 50 |
| 10 |
250 |
4.17 |
106 |
150 to 600lb |
PN 6 to 50 |
| 12 |
300 |
4.76 |
121 |
150 to 600lb |
PN 6 to 50 |
| 14 |
350 |
5.24 |
133 |
150 to 600lb |
PN 6 to 50 |
| 16 |
400 |
5.55 |
141 |
150 to 600lb |
PN 6 to 50 |
| 18 |
450 |
5.71 |
145 |
150 to 600lb |
PN 6 to 50 |
| 20 |
500 |
5.83 |
148 |
150 to 600lb |
PN 6 to 50 |
|
