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(Patented)


Opti-Gard™ is an advanced, reverse acting (compression loaded) bursting disc, peripherally scored on the vent side for accurate burst control. Elfab offer Opti-Gard™ as a single disc solution across a wide range of burst pressures and sizes.

With a 95% operating to burst pressure ratio, and performance tolerance of 3%, Opti-Gard™ offers the highest performance characteristics available for liquid, gas or vapour.

Standard features include: - non-invasive burst detection system, manufactured in corrosion-resistant Hastelloy and built in orientation enforcement.

 
  • Liquid, gas and vapour compatible
  • Architecturally engineered burst pressures
  • Installed in Elfab’s new universal flange holder
  • Advanced cyclic performance
  • Non-fragmenting design
  • Highest available operating ratio
  • Industry-leading 3% performance tolerance
  • Excellent leak tightness
  • Manufactured in Hastelloy
  • Supplied with ATEX-approved Integral Flo-Tel™ burst detection
  • Standard 1-week lead time
   
Specifications
SIZE RANGE
25mm to 600mm(1" to 24")
BURST PRESSURE RANGE
0.35 bar g to 70 bar g(5 psig to 1015 psig)
TEMPERATURE RANGE
-200 to 600°C (-330 to 1112°F)
MAXIMUM OPERATING RATIO
95% of minimum burst pressure(92% of nominal burst pressure)
FRAGMENTATION ON BURST
non-fragmenting design
RELIEF VALVE ISOLATION
excellent
VACUUM SERVICE
suitable for full vacuum
FLUID COMPATIBILITY
liquid, gas or vapour
KRVALUES
5.5 (knuckle >10Barg)
2.9 (No knuckle ≤ 10Barg)
TORQUE-SENSITIVE
no
CYCLE LIFE
tested to over 100,000 pressure-vacuum cycles*
MATERIAL RANGE
Hastelloy as standard, others available.
REVERSAL RATIO
not applicable with offset tag + system-loc
DAMAGE RATIO
<1(fail-safe)
LEAK TIGHTNESS
excellent
PERFORMANCE TOLERANCE
+/- 3%(zero manufacturing design range)
PROTECTIVE LININGS *from full vacuum to 95% of the minimum burst pressure
available


Pressure and Solutions Intelligence
The Opti-Gard™ disc is part of a unique system providing a fully-loaded technical solution with advanced detection and flexibility, plus the ability to offer significant benefits to everyone involved in the Specifications, purchase and operation of pressure management systems. To find out how the Opti-Gard™ system 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
Hastelloy
Stainless Steel/Inconel
Nickel / Monel
mm
inch
Minimum
Maximum
Minimum
Maximum
Minimum
Maximum
25
1
3.5 (50)
70 (1015)
3.5 (50)
70 (1015)
3.5 (50)
55 (797)
40
1 ½
1.9 (27)
70 (1015)
1.9 (27)
70 (1015)
1.9 (27)
55 (797)
50
2
0.9 (13)
60 (870)
1.0(14)
60 (870)
1.0 (14)
45 (652)
65
2 ½
0.9 (13)
60 (870)
1.0 (14)
60 (870)
1.0 (14)
45 (652)
80
3
0.5 (7)
50 (725)
0.5 (7)
50 (725)
0.5 (7)
38 (551)
100
4
0.35 (5)
50 (725)
0.35 (5)
50 (725)
0.35 (5)
38 (551)
150
6
0.9 (13)
40 (580)
0.9 (13)
40 (580)
0.9 (13)
30 (435)
200
8
0.9 (13)
30 (435)
0.9 (13)
30 (435)
0.9 (13)
23 (334)
250
10
0.9 (13)
25 (360)
0.9 (13)
25 (360)
0.9 (13)
19 (276)
300
12
0.9 (13)
20 (290)
0.9 (13)
20 (290)
0.9 (13)
15 (218)
350
14
0.9 (13)
18 (261)
0.9 (13)
18 (261)
0.9 (13)
14 (203)
400
16
0.9 (13)
15 (218)
0.9 (13)
15 (218)
0.9 (13)
11 (160)
450
18
0.9 (13)
10 (145)
0.9 (13)
10 (145)
0.9 (13)
7.5 (109)
500
20
0.9 (13)
8 (116)
0.9 (13)
8 (116)
0.9 (13)
6.0 (87)
600
24
0.9 (13)
6 (87)
0.9 (13)
6 (87)
0.9 (13)
4.5 (65)

PERFORMANCE TOLERANCE(ZERO MANUFACTURING DESIGN RANGE)
Burst Pressure
Tolerance
Burst Pressure
Tolerance
Up to 4.48 barg
+/- 0.14 barg
Up to 65 psig
+/- 2.0 psig
Above 4.48 barg
+/- 3%
Above 65 psig
+/- 3%

STANDARD TEMPERATURE RANGE °C(°F)
Material
Minimum
Maximum
Hastelloy
-80 (-112)
480 (900)
Nickel
-80 (-112)
400 (750)
Stainless Steel
-80 (-112)
480 (900)
Inconel
-80 (-112)
600 (1112)
Monel
-80 (-112)
425 (800)
Fluoropolymer
-80 (-112)
280 (536)

FREE FLOW AREA / MINIMUM NET FLOW AREA(MNFA)
Nominal Bore
Burst Pressure at or Below 10barg(145psig)
Burst Pressure Above 10barg(145psig)
mm
inch
mm2
in2
mm2
in2
25
1
500
0.78
511
0.79
40
1 ½
1092
1.69
1102
1.71
50
2
1834
2.84
1870
2.90
65
2 ½
2701
4.19
2719
4.21
80
3
4393
6.81
4535
7.03
100
4
7072
10.96
7208
11.17
150
6
15085
23.38
15601
24.18
200
8
28506
44.18
29327
45.46
250
10
41969
65.05
43641
67.64
300
12
61203
94.86
64055
99.29
350
14
83684
129.7
87627
135.8
400
16
109665
170.0
114832
178.0
450
18
139529
216.3
NA
NA
500
20
172988
268.1
NA
NA
600
24
249156
386.2
NA
NA

HOLDER DIMENSIONS
Nominal Bore(B)
Height(C)
Outside Diameter(A)
mm
inch
mm
inch
BS EN 1092
ANSI
25
1
40
1.57
PN 6 to 50
150 to 600 lb
40
1 ½
42
1.65
PN 6 to 50
150 to 600 lb
50
2
44
1.73
PN 6 to 50
150 to 600 lb
65
2 ½
49.6
1.95
PN 6 to 50
150 to 600 lb
80
3
55
2.17
PN 6 to 50
150 to 600 lb
100
4
58
2.28
PN 6 to 50
150 to 600 lb
150
6
74
2.91
PN 6 to 50
150 to 600 lb
200
8
91
3.58
PN 6 to 50
150 to 600 lb
250
10
106
4.17
PN 6 to 50
150 to 600 lb
300
12
121
4.76
PN 6 to 50
150 to 600 lb
350
14
158
6.22
PN 6 to 50
150 to 600 lb
400
16
179
7.05
PN 6 to 50
150 to 600 lb
450
18
195
7.68
PN 6 to 50
150 to 600 lb
500
20
214
8.43
PN 6 to 50
150 to 600 lb
600
24
251
9.88
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 as standard.

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.

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