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Products > Bio-Gard (BG) > Bio-Gard (BG) Details
 
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Installation Guide
 
 


Bio-Gard is a low pressure, compression-loaded, scored reverse bursting disc, designed specifically for protection of aseptic and hygienic plant. Bio-Gard has a smooth uninterrupted surface finish to reduce microbial load and maximise steam sterilisation (SIP) and clean in place (CIP) procedures.

Bio-Gard is available with Elfab’s Bio-Tel hygienic senor, designed for use with this product and supplied with its own detector lead enabling easy installation and maintenance.
   

  • Smooth process face with score on vent side
  • FDA compatible materials
  • Low pressure capability
  • Non fragmenting design
  • No vacuum support required
  • No dedicated holder required
  • Compliant with 3-A standard
  • Hygienic burst detection available
  • Ideal for CIP and SIP applications
Specifications
Size Range
25mm to 50mm(1" to 2")
Burst Pressure Range
2.0 bar g to 10 bar g(29 psig to 145 psig)
Temperature Range
-40 to 200C(-40 to 400F)
Maximum Operating Ratio
90% of minimum burst pressure(81% of nominal burst pressure)
Fragmentation on Burst
Non-fragmenting design
Relief Valve Isolation
Excellent
Vacuum Service
Suitable for full vacuum
Fluid Compatibility
Gas, vapour or call for liquid compatibility
KR Values
Not available
Disc Surface Finish
Typical 0.4m Ra or better
Cycle Life
Excellent
Material Range
Stainless Steel as standard, others available.
Reversal Ratio
<1.5
Damage Ratio
<1.5
Leak Tightness
Excellent(typically <10-6 std cc sec 1)
Performance Tolerance
+/- 10%(zero manufacturing design range)

Specifications and Performance
Burst Pressure Range in barg(psig) at 20 °C (68 °F)
Nominal Bore
Stainless Steel
Hastelloy
Nickel
(mm)
(inch)
Min
Max
Min
Max
Min
Max
25
1
2.5(36)
10(145)
3.0(44)
10(145)
2.0(29)
8.0(116)
40
1 ½
2.0(29)
10(145)
2.5(36)
10(145)
2.0(29)
6.0(87)
50
2
2.0(29)
10(145)
2.5(36)
10(145)
2.0(29)
6.0(87)

Performance Tolerance(Zero Manufacturing Design Range)
Burst Pressure
Tolerance
Entire Range
+/- 10%

Standard Temperature Range °C (°F)
Material
Minimum
Maximum
Stainless Steel
-40(-40)
200(400)
Nickel
-40(-40)
200(400)
Hastelloy
-40(-40)
200(400)

Free Flow Area / Minimum Flow Area(MNFA)
Nominal Bore
Value
mm
inch
mm2
in2
25
1
327
0.51
40
1 ½
825
1.28
50
2
1555
2.41

ISO 2852 Welded Clamp Liners Dimensions
Nominal Bore(B)
A
B
C
D
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
25
1
22.60
0.89
25.60
1.01
50.50
1.99
21.50
0.85
40
1 ½
35.60
1.40
38.60
1.52
50.50
1.99
21.50
0.85
50
2
48.60
1.91
51.60
2.03
64.00
2.52
21.50
0.85




VITON
EPDM
Silicone
Temperature
-20 to 200 C
(-4 to 392 F)
-40 to 150 C
(-40 to 302 F)
-40 to 200 C
(-40 to 392 F)
Compression Set
Good to Excellent
Fair to Good
Excellent
Ozone & sunlight
Outstanding
Excellent
Outstanding
Abrasion Resistance
Good
Good/Excellent
Poor
Taste
Good
Good
Good
Odour
Good
Poor to Good
Good

VITON®: Resistant to acids, solvents and most commonly used chemicals in the food industry. Not suitable for use with ketones, esters or hot concentrated caustics.

EPDM: Good for ketones, alcohols, strong mineral acids and alkalis, outstanding resistance to hot water and steam. Not suitable for use with mineral oils and hydrocarbons (terpolymer).

Silicone: Good resistance to alkali, acid solutions and animal/vegetable fats. Also good for use with strong oxidising agents. Physiologically non interactive.

PTFE: We do not recommend this material due to its incompressible nature.

Other: Elfab can supply welded hygienic units where this gasket range is not suitable.

ELECTRICAL PARAMETERS
  • Instant pressure relief detection
  • Suitable for many installations
  • Easy installation
  • ATEX approved II 1GD EEx ia IIB.T3T6
  • EC-Type Examination Certificate ITS04 ATEX 21886
Bio-Tel has been designed specifically for use with the Bio-Gard disc range and is ideally suited to hygienic applications. It is supplied with a 2 metre cable with IP67 vibration proof connection as standard. When used with the appropriate barrier / isolator the Bio-Tel is deemed a simple apparatus in accordance with EN 50014 & EN50020 and can be used in Zone 1 potentially explosive atmospheres. As the Bio-Tel is located in a non-wetted area the standard gasket material is VITON®
MINIMUM OPERATING PRESSURE in barg(psig) AT 20 °C (68 °F)
Nominal Bore mm /(inch)
25(1)
40(1½)
50(2)
80(3)
100(4)
Thick- ness mm /(inch)
3(1/8)
3(1/8)
3(1/8)
3(1/8)
3(1/8)
Min. Pressure
0.70(10)
0.48(7)
0.28(4)
0.21(3)
0.14(2)

ELECTRICAL INFORMATION
TEMPERATURE LIMITS
Maximum resistance before bursting: 30 Ohms
Maximum circuit voltage: 25V
Maximum current: 125mA
Optional 2 meter cable available with Bio-Tel.
-20°C (-4°F) to +175°C (347°F)

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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