Products > Replaced Products > Uni-Gard (UG)    Print this product datasheet
 
(previously known as SU/LU/GU)
Uni-Gard is a compression-loaded, scored, reverse bursting disc which has been specifically designed to operate, with increased precision, at very low pressures. The Uni-Gard system incorporates many unique technical features which have been included to help reduce lifetime costs and offer many tangible benefits to the end user.

The Uni-Gard system is provided complete with Elfab’s System-Loc to help ensure correct installation and all bursting discs undergo 100% proof testing prior to delivery.
 
 
  • Exceptional leak tightness
  • Very low pressure – High duty capable
  • Proof tested design suitable for demanding applications
  • Gas and liquid compatible
  • Fool-proof and safe installation
  • Unique non-invasive integral burst detection available (EEx ia llC T6)
  • Structurally enhanced profile leading to increased product durability and life
Specifications
SIZE RANGE
25mm to 100mm (1" to 4")
BURST PRESSURE RANGE
0.5 bar g to 10 bar g (7 psig to 145 psig)
TEMPERATURE RANGE
-80 to 600C (-112 to 392F)
MAXIMUM OPERATING RATIO
90% of minimum burst pressure(86% of nominal burst pressure)
FRAGMENTATION ON BURST
non-fragmenting design
RELIEF VALVE ISOLATION
excellent
VACUUM SERVICE
no support required above 2.0 bar g
FLUID COMPATIBILITY
gas or vapour
KR VALUES
not available
TORQUE-SENSITIVE
no
CYCLE LIFE
tested to over 100,000 pressure-vacuum cycles
MATERIAL RANGE
Stainless Steel as standard, others available.
REVERSAL RATIO
not applicable with offset tag + system-loc
DAMAGE RATIO
<1.5
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
Nickel
Stainless Steel / Inconel
Hastelloy
mm
inch
Min
Max
Min
Max
Min
Max
25
1
1.5 (21.8)
9.0 (131)
2.0 (29)
10.0 (145)
2.5 (36.3)
12.0 (174)
40
1 ½
1.3 (18.9)
7.0 (102)
1.7 (24.7)
8.5 (123)
2.0 (29)
10.0 (145)
50
2
1.0 (14.5)
6.0 (87)
1.3 (18.9)
8.0 (116)
1.5 (21.8)
8.5 (123)
80
3
0.8 (11.6)
5.5 (79.8)
1.0 (14.5)
7.0 (102)
1.2 (17.4)
7.5 (109)
100
4
0.5 (7.3)
4.5 (65.3)
0.5 (7.3)
5.0 (72.5)
1.0 (14.5)
5.5 (79.8)

PERFORMANCE TOLERANCE (ZERO MANUFACTURING DESIGN RANGE)
Burst Pressure
Tolerance
Up to 2.76barg (40psig)
+/- 0.14 barg (+/- 2.0 psig)
> 2.76barg (40psig)
+/- 5%

STANDARD TEMPERATURE RANGE °C (°F)
Material
Minimum
Maximum
Stainless Steel
-80 (-112)
480 (900)
Nickel
-80 (-112)
400 (750)
Inconel
-80 (-112)
600 (1080)
Hastelloy
-80 (-112)
480 (900)

FREE FLOW AREA / MINIMUM NET FLOW AREA (MNFA)
Nominal Bore
Value
mm
inch
mm2
in2
25
1
486
0.75
40
1 ½
1166
1.81
50
2
1985
3.08
80
3
4790
7.43
100
4
7553
11.71

HOLDER DIMENSIONS
Nominal Bore (B)
Height (C)
Outside Diameter (A)
mm
inch
mm
inch
BS EN 1092
ANSI
25
1
61
2.40
PN 6 to 50
150 to 600 lb
40
1 ½
61
2.40
PN 6 to 50
150 to 600 lb
50
2
61
2.40
PN 6 to 50
150 to 600 lb
80
3
63
2.49
PN 6 to 50
150 to 600 lb
100
4
63
2.49
PN 6 to 50
150 to 600 lb

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 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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