| Specifications |
| SIZE RANGE |
25 to 500 mm (1 to 20 ins) |
| BURST PRESSURE RANGE |
2.0 to 40 bar g (30 to 580 psig) |
| TEMPERATURE RANGE |
-200 to 500C (-330 to 930F) |
| MAXIMUM OPERATING RATIO |
95% |
| FRAGMENTATION ON BURST |
non fragmenting design |
| RELIEF VALVE ISOLATION |
excellent |
| VACUUM SERVICE |
suitable |
| FLUID COMPATIBILITY |
gas, vapour or gas cap only |
| TORQUE-SENSITIVE |
no |
| CYCLE LIFE |
excellent |
| MATERIAL RANGE |
good |
| REVERSAL RATIO |
not applicable with offset tag +
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
bursting discs are manufactured in-house to the highest standards,
being tested and certified in accordance with BS2915, the
British Standard for bursting discs. To ensure the correct
performance of a bursting disc, it must be used in its correct
holder, as specified by the bursting disc manufacturer.
As the temperature seen by a bursting 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
and corrosion resistance, customised designs and burst detection.
Specifications and Performance
| BURST PRESSURE
RANGE in barg (psig) at 20 °C (68 °F) |
| Nominal Size |
Nickel |
Stainless Steel/ Inconel |
| mm |
inch |
Min |
Max |
Min |
Max |
| 25 |
1 |
8.0(116) |
30(435) |
20(290) |
40(580) |
| 40 |
1½ |
5.0(72.5) |
30(435) |
15(218) |
30(435) |
| 50 |
2 |
4.0(58) |
30(435) |
10(145) |
30(435) |
| 65 |
2½ |
4.0(58) |
25(363) |
10(145) |
27(392) |
| 80 |
3 |
4.0(58) |
20(290) |
10(145) |
25(363) |
| 100 |
4 |
3.0(43.5) |
15(218) |
8.0(116) |
25(363) |
| 150 |
6 |
2.5(36.3) |
14(203) |
6.0(87) |
20(290) |
| 200 |
8 |
2.5(36.3) |
13(189) |
5.0(72.5) |
15(218) |
| 250 |
10 |
2.0(29) |
12(174) |
5.0(72.5) |
15(218) |
| 300 |
12 |
2.0(29) |
12(174) |
3.0(43.5) |
15(218) |
| 350 |
14 |
2.0(29) |
10(145) |
2.5(36.3) |
12(174) |
| 400 |
16 |
2.0(29) |
8.0(116) |
2.5(36.3) |
10(145) |
| 450 |
18 |
2.0(29) |
7.0(102) |
2.5(36.3) |
8.0(116) |
| 500 |
20 |
2.0(29) |
6.0(87) |
2.0(29) |
8.0(116) |
| PERFORMANCE
TOLERANCE (ZERO MANUFACTURING DESIGN RANGE) |
| Burst Pressure |
Tolerance |
| Entire Range |
+/- 5% |
| STANDARD TEMPERATURE
RANGE °C (°F) |
| Material Temperature
Limits °C (°F) |
| Material |
Minimum |
Maximum |
| Stainless Steel |
-80 (-112) |
480 (900) |
| Inconel |
-80 (-112) |
600 (1112) |
| Nickel |
-80 (-112) |
400 (750) |
| FREE FLOW AREA
/ MINIMUM NET FLOW AREA (MNFA) |
| Nominal Size |
| mm |
inch |
mm2 |
inch2 |
| 25 |
1 |
507 |
0.79 |
| 40 |
1½ |
1257 |
1.95 |
| 50 |
2 |
2027 |
3.14 |
| 65 |
2½ |
3319 |
5.14 |
| 80 |
3 |
5027 |
7.79 |
| 100 |
4 |
8108 |
12.57 |
| 150 |
6 |
17674 |
27.39 |
| 200 |
8 |
31420 |
48.70 |
| 250 |
10 |
49094 |
76.10 |
| 300 |
12 |
70695 |
109.58 |
| 350 |
14 |
96224 |
149.15 |
| 400 |
16 |
125680 |
194.80 |
| 450 |
18 |
159064 |
246.55 |
| 500 |
20 |
196375 |
304.38 |
| HOLDER DIMENSIONS |
| Nominal Size B |
Height C |
Outside Diameter
A |
| mm |
inch |
mm |
inch |
BS EN 1092 |
ANSI |
| 25 |
1 |
58 |
2.28 |
PN 6 to 50 |
150 to 600lb |
| 40 |
1½ |
60 |
2.36 |
PN 6 to 50 |
150 to 600lb |
| 50 |
2 |
60 |
2.36 |
PN 6 to 50 |
150 to 600lb |
| 65 |
2½ |
66 |
2.60 |
PN 6 to 50 |
150 to 600lb |
| 80 |
3 |
68 |
2.68 |
PN 6 to 50 |
150 to 600lb |
| 100 |
4 |
72 |
2.83 |
PN 6 to 50 |
150 to 600lb |
| 150 |
6 |
79 |
3.11 |
PN 6 to 50 |
150 to 600lb |
| 200 |
8 |
91 |
3.58 |
PN 6 to 50 |
150 to 600lb |
| 250 |
10 |
106 |
4.17 |
PN 6 to 50 |
150 to 600lb |
| 300 |
12 |
121 |
4.76 |
PN 6 to 50 |
150 to 600lb |
| 350 |
14 |
133 |
5.24 |
PN 6 to 50 |
150 to 600lb |
| 400 |
16 |
141 |
5.55 |
PN 6 to 50 |
150 to 600lb |
| 450 |
18 |
145 |
5.71 |
PN 6 to 50 |
150 to 600lb |
| 500 |
20 |
148 |
5.83 |
PN 6 to 50 |
150 to 600lb |
|
