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Products > Forward >  Flat Composite (FC)
 
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The Flat Slotted Lined tension-loaded composite rupture disc offers an economic solution to many very low pressure applications.

This non-fragmenting design is offered in an extensive size and material range, bringing enhanced protection, reliability and leak-tightness through its unique tri-membrane construction.
   
  • Can be used with Elfab’s unique ATEX approved Integral Flo-Tel™ burst detection
  • Very low pressure capability
  • Corrosion resistant
  • Non torque-sensitive
  • Non-fragmenting design
Specifications
SIZE RANGE
1" to 32" (25mm to 800mm)
BURST PRESSURE RANGE
1 psig to 50 psig (0.07 barg to 3.5 barg)
TEMPERATURE RANGE
-112 to 480F (-80 to 250C)
MAXIMUM OPERATING RATIO
40% of minimum burst pressure, 36% of nominal burst pressure
FRAGMENTATION ON BURST
Non-fragmenting design
RELIEF VALVE ISOLATION
Suitable
VACUUM SERVICE
Backpressure support required
FLUID COMPATIBILITY
Liquid, gas or vapor
KR VALUES
Not available
TORQUE-SENSITIVE
No
CYCLE LIFE
Poor
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
+/- 10% (zero manufacturing design range)
PROTECTIVE LININGS
Not available

Pressure and Solutions Intelligence
Depending on backpressure requirements, backpressure supports may be required. On Flat Slotted Lined rupture disc devices the backpressure support is integral in the holder.
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 Top SectionFluoropolymer Seal
inches
mm
min
max
min
max
1
25
20.3 (1.4)
36.3 (2.5)
36.3 (2.5)
50.8 (3.5)
1 ½
40
14.5 (1.0)
27.6 (1.9)
26.1 (1.8)
47.0 (3.3)
2
50
7.25 (0.5)
17.4 (1.2)
13.1 (0.9)
30.5 (2.1)
2 ½
65
5.8 (0.4)
13.1 (0.9)
10.2 (0.7)
23.2 (1.6)
3
80
5.1 (0.35)
11.6 (0.8)
8.7 (0.6)
20.3 (1.4)
4
100
2.9 (0.2)
10.2 (0.7)
5.8 (0.4)
18.9 (1.3)
6
150
2.2 (0.15)
10.2 (0.7)
3.6 (0.25)
18.9 (1.3)
8
200
1.45 (0.1)
8.7 (0.6)
2.9 (0.2)
16.0 (1.1)
10
250
1.45 (0.1)
7.25 (0.5)
2.2 (0.15)
11.6 (0.8)
12
300
1.02 (0.07)
5.8 (0.4)
1.45 (0.1)
10.2 (0.7)
14
350
1.02 (0.07)
8.7 (0.6)
16
400
1.02 (0.07)
7.25 (0.5)
18
450
1.02 (0.07)
7.25 (0.5)
20
500
1.02 (0.07)
7.25 (0.5)
24
600
1.02 (0.07)
7.25 (0.5)
28
700
1.02 (0.07)
7.25 (0.5)
32
800
1.02 (0.07)
7.25 (0.5)

PERFORMANCE TOLERANCE (ZERO MANUFACTURING DESIGN RANGE)
Burst Pressureat 68 °F (20 °C)
32 to 122F(0 to 50C)
Above 122F (50C)Below 32F (0C)
Above 7.25 (0.5)
+/- 10%
+/- 15%
4.35 (0.3) to 7.25 (0.5)
+/- 15%
+/- 20%
2.9 (0.2) to 4.35 (0.3)
+/- 20%
+/- 25%
2.9 (0.2) and below
+/- 25%
+/- 30%

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
Inches
mm
in2
mm2
1
25
0.40
261
1 ½
40
1.25
805
2
50
2.15
1388
2 ½
65
3.83
2468
3
80
6.32
4078
4
100
9.95
6422
6
150
21.94
14152
8
200
40.34
26025
10
250
76.10
49094
12
300
109.6
70695
14
350
149.2
96224
16
400
194.8
125680
18
450
246.5
159064
20
500
304.4
196375
24
600
438.3
282780
28
700
596.6
384895
32
800
779.2
502720

Note: Up to 8 inch support is integral to disc. Above 8 inch support will be a separate item, possibly integral to holder.

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.