Products > Forward > Conventional Domed (CD)    Print this product datasheet
 
(previously known as SM)

The conventional domed tension-loaded bursting disc is an extensively-used bursting disc, offering a wide range of materials and sizes for an effective, economic solution to many applications.

  • Fail-safe installation (subject to back pressure support)
  • Non torque-sensitive
  • Smooth operating surface, (where no back pressure support required)

Specifications
Size Range
3mm to 800mm (1/8" to 32")
Burst Pressure Range
0.5 bar g to 1400 bar g (7 psig to 20300 psig)
Temperature Range
-200 to 600C (-330 to 1112F)
Maximum Operating Ratio
85% of minimum burst pressure(92% of nominal burst pressure)
Fragmentation on Burst
May fragment
Relief Valve Isolation
Not recommended
Vacuum Service
No support required above burst pressure of 30 bar g
Fluid Compatibility
Liquid, gas or vapour
KR Values
Not available
Torque Sensitive
No
Cycle Life
Excellent
Material Range
Stainless Steel as standard, others available.
Reversal Ratio
<1 (fail-safe) depending on back pressure support
Damage Ratio
<1 (fail-safe)
Leak Tightness
Excellent
Performance Tolerance
+/- 5% (zero manufacturing design range)
Protective Linings
Available


Pressure and Solutions Intelligence
To find out how our products could benefit you and your organisation, or for Specifications outside those stated on this data sheet please contact Elfab directly or via your local representative.

Specifications and Performance

Burst Pressure Range in barg(psig) at 20 °C (68 °F)
Nominal Bore
Standard Materials
Stainless Steel
Aluminium
Nickel / Monel
Inconel
mm
ins
Min
Max
Min
Max
Min
Max
Min
Max
15
½
40(580)
1400(20305)
4.0(58)
60(870)
20(290)
1000(14504)
70(870)
1400(20305)
25
1
20(290)
650(9428)
2.0(29)
30(435)
10(145)
500(7252)
35(508)
650(9428)
40
1½
20(290)
600(8702)
1.6(23)
20(290)
8.0(116)
400(5801)
25(363)
600(8702)
50
2
17(247)
200(2900)
1.5(22)
15(218)
6.0(87)
200(2900)
20(290)
200(2900)
65
2 ½
16(232)
200(2900)
1.5(22)
14(203)
6.0(87)
200(2900)
18(261)
200(2900)
80
3
15(218)
200(2900)
1.5(22)
12(174)
5.0(73)
200(2900)
15(218)
200(2900)
100
4
15(218)
200(2900)
1.2(17)
10(145)
5.0(73)
150(2176)
15(218)
200(2900)
150
6
12(174)
160(2320)
1.0(14.5)
8(116)
4.0(58)
100(1450)
15(218)
160(2320)
200
8
10(145)
120(1740)
0.8(11.6)
7(102)
4.0(58)
80(1160)
12(174)
120(1740)
250
10
8.0(116)
100(1450)
0.7(10.2)
6.0(87)
4.0(58)
70(1015)
10(145)
100(1450)
300
12
6.5(94)
80(1160)
0.6(8.7)
5.0(73)
4.0(58)
60(870)
8.0(116)
80(1160)
350
14
6.5(94)
70(1015)
0.5(7.3)
4.0(58)
4.0(58)
50(725)
8.0(116)
70(1015)
400
16
6.5(94)
60(870)
0.5(7.3)
3.0(44)
4.0(58)
50(725)
7.0(101)
60(870)
450
18
6.0(87)
55(797)
0.5(7.3)
2.0(29)
4.0(58)
45(653)
7.0(102)
55(797)
500
20
5.5(80)
50(725)
0.5(7.3)
2.0(29)
4.0(58)
40(580)
6.0(87)
50(725)
600
24
5.0(73)
40(580)
1.0(14.5)
2.0(29)
3.0(44)
30(435)
5.0(73)
40(580)
700
28
4.0(58)
35(509)
1.0(14.5)
1.5(22)
2.5(36)
24(348)
4.0(58)
35(509)
800
32
3.0(44)
30(435)
1.0(14.5)
1.2(17)
2.0(29)
20(290)
3.0(44)
30(435)

Performance Tolerance (Zero Manufacturing Design Range)
Burst Pressure at 20c (68F)
0 to 50c (32 to 122F)
Above 50c (122F) Below 0c (32F)
Above 2barg (29psig)
+/- 5%
+/- 10%
2barg (29psig) or below
+/- 10%
+/- 15%
N.B. With an aluminium disc there is an increase to the above performance tolerances of +5%.

Standard Temperature Range °C (°F)
Material
Minimum
Maximum
Aluminium
-80 (-112)
480 (900)
Nickel
-80 (-112)
400 (750)
Stainless Steel
-80 (-112)
480 (900)
Inconel
-80 (-112)
600 (1080)
Monel
-80 (-112)
425 (800)
Fluoropolymer Lining
-80 (-112)
280 (536)



Free Flow Area / Minimum Net Flow Area (MNFA)
Nominal Bore
Value
mm
inch
mm2
in2
25
1
506
0.78
40
1 ½
1256
1.95
50
2
2027
3.14
65
2 ½
3318
5.14
80
3
5027
7.79
100
4
8108
12.57
150
6
17673
27.39
200
8
31420
48.70
250
10
49093
76.09
300
12
70695
109.6
350
14
96223
149.1
400
16
125680
194.8
450
18
159063
246.5
500
20
196375
304.4
600
24
282780
438.3
700
28
384895
596.6
800
32
502720
779.2

Holder Dimensions
Nominal Bore (B)
Height (C)
Outside Diameter (A)
mm
inch
mm
inch
BS EN 1092
ANSI
25
1
38.4
1.51
PN 6 to 50
150 to 600 lb
40
1 ½
38.4
1.51
PN 6 to 50
150 to 600 lb
50
2
38.4
1.51
PN 6 to 50
150 to 600 lb
65
2 ½
40
1.57
PN 6 to 50
150 to 600 lb
80
3
42
1.65
PN 6 to 50
150 to 600 lb
100
4
47
1.85
PN 6 to 50
150 to 600 lb
150
6
62
2.44
PN 6 to 50
150 to 600 lb
200
8
58
2.28
PN 6 to 50
150 to 600 lb
250
10
58
2.28
PN 6 to 50
150 to 600 lb
300
12
58
2.28
PN 6 to 50
150 to 600 lb
350
14
66.5
2.62
PN 6 to 50
150 to 600 lb
400
16
66.5
2.62
PN 6 to 50
150 to 600 lb
450
18
71.5
2.81
PN 6 to 50
150 to 600 lb
500
20
71.5
2.81
PN 6 to 50
150 to 600 lb
600
24
88
3.46
PN 6 to 50
150 to 600 lb
700
28
102
4.02
PN 6 to 50
150 to 600 lb
800
32
116
4.57
PN 6 to 50
150 to 600 lb

The holder is machined with Excess Flow Valve tapping and is configured to accept Elfab’s ATEX-approved Integral Flo-Tel™ burst detection switch.

To ensure the correct performance of a bursting disc, it must be used in its correct holder, as specified by the bursting disc manufacturer.

Pressure Intelligence

 The data shown on these sheets represents the standard offering from Elfab. Depending upon the requirements of your application, Elfab maybe able to provide a solution based on this product but outside the standard operating parameters. In addition, Elfab produces an extensive range of alternative products which maybe more suitable for your requirements.

As a result of extensive testing, Elfab can advise on these choices, or on other technical matters, such as discharge requirements, temperature testing, material selection and corrosion resistance, customised designs and burst detection.

To discuss your specific product or service requirements please contact your Elfab representative.

© 2004 Elfab Ltd.
 
Click here to email our sales department. Click for more contact details.