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Products > Forward > Domed Composite (DC)
 
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(Previously known as SC)

Domed composite is a forward acting (tension-loaded) rupture disc, which provides a low pressure, non- fragmenting solution across an extensive size range.

Its unique tri-membrane construction brings enhanced protection, reliability and leak-tightness, and is produced in various slotting arrangements to suite the user’s requirements.

  

  • Can be used with Elfab’s unique ATEX approved Integral Flo-Tel™ burst detection
  • Low pressure capability
  • Non torque-sensitive
  • Corrosion resistant
  • Non-fragmenting design

Specifications
SIZE RANGE
1 to 32 (25mm to 800mm)
BURST PRESSURE RANGE
5 psig to 290 psig (0.3 barg to 20 barg)
TEMPERATURE RANGE
-112 to 482F (-80 to 250C)
MAXIMUM OPERATING RATIO
85% of minimum burst pressure(81% of nominal burst pressure)
FRAGMENTATION ON BURST
Non-fragmenting design
RELIEF VALVE ISOLATION
Good
VACUUM SERVICE
Back pressure support required
FLUID COMPATIBILITY
Liquid, gas or vapor
KR VALUES
Not available
TORQUE-SENSITIVE
No
CYCLE LIFE
Good
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
Good
PERFORMANCE TOLERANCE
+/- 5% (zero manufacturing design range)
PROTECTIVE LININGS
Not available

Pressure and Solutions Intelligence
Depending on backpressure requirements, Elfab rupture discs are fitted with opening or non-opening backpressure supports. Elfab’s unique design of non-opening backpressure supports allows up to 80% free flow area.

To find out how our products could benefit you and your organization, 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 psig (barg) at 68 °F (20 °C)
Nominal Bore
Nickel Top sectionFluoropolymer Seal
Stainless Steel/Inconel Top SectionFluoropolymer Seal
inches
mm
min
max
min
max
1
25
29 (2.0)
276 (19)
51 (3.5)
290 (20)
1 ½
40
28 (1.9)
276 (19)
45 (3.3)
290 (20)
2
50
23 (1.6)
218 (15)
30 (2.1)
290 (20)
2 ½
65
17 (1.2)
145 (10)
23 (1.6)
261 (18)
3
80
12 (0.8)
145 (10)
20 (1.4)
261 (18)
4
100
11(0.75)
145 (10)
19 (1.3)
247 (17)
6
150
10 (0.7)
109 (7.5)
19 (1.3)
189 (13)
8
200
8.7 (0.6)
87 (6.0)
16 (1.1)
145 (10)
10
250
6.5 (0.45)
73 (5.0)
12 (0.8)
123 (8.5)
12
300
5.8 (0.4)
58 (4.0)
10 (0.7)
80 (5.5)
14
350
5.1 (0.35)
58 (4.0)
8.7 (0.6)
80 (5.5)
16
400
4.4 (0.3)
55 (3.8)
8.0 (0.55)
80 (5.5)
18
450
4.4 (0.3)
44 (3.8)
8.0 (0.55)
80 (5.5)
20
500
4.4 (0.3)
44 (3.8)
44 (0.55)
80 (5.5)
24
600
4.4 (0.3)
44 (3.0)
7.3 (0.5)
80 (5.5)
28
700
4.4 (0.3)
39 (2.7)
7.3 (0.5)
68 (4.7)
32
800
4.4 (0.3)
36 (2.5)
7.3 (0.5)
62 (4.3)

PERFORMANCE TOLERANCE (ZERO MANUFACTURING DESIGN RANGE)
Burst Pressure at 68 °F (20 °C)
32 to 122F (0 to 50C)
Above 122F (50C), Below 32F (0C)
Above 29psig (2barg)
+/- 5%
+/- 10%
29psig (2barg) or below
+/- 10%
+/- 15%

STANDARD TEMPERATURE RANGE °F (°C)
Seal Membrane Material
Minimum
Maximum
Fluoropolymer
-112 (-80)
482 (250)

FREE FLOW AREA / MINIMUM NET FLOW AREA (MNFA)
Nominal Bore
Value
Burst Pressure
Value
inch
mm
in2
mm2
in2
mm2
1
25
0.70
452
< 7 barg
0.527
340
1 ½
40
1.49
962
< 5 barg
1.42
917
2
50
2.47
1590
< 4 barg
2.29
1480
2 ½
65
4.68
3019
3
80
6.85
4418
4
100
9.86
6362
6
150
23.86
15394
8
200
43.95
28353
10
250
70.12
45239
12
300
102.4
66052
14
350
140.7
90792
16
400
185.2
119459
18
450
235.7
152053
20
500
292.3
188574
24
600
409.5
264208
28
700
563.0
363168
32
800
740.7
477836


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

The holder is configured to accept Elfab’s ATEX-approved Integral Flo-Tel™ burst detection switch as standard.

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

Solution 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, customized designs and burst detection.

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

© 2004 Elfab Ltd.