Technical Guide
Rubberised Cork Specifications
|
Grades & |
RC-50A |
RC-70A |
RC-80A |
RC-50B |
RC-70B |
RC-80B |
RC-50C |
RC-70C |
RC-80C |
|
Hardness IRDH |
50±10 |
70±5 |
80±5 |
50±5 |
70±5 |
80±5 |
50±5 |
70±5 |
80±5 |
|
Dimesion changes |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
|
Tensile Strength |
650 |
900 |
1250 |
700 |
1250 |
1550 |
1250 |
1550 |
1900 |
|
Compressibility % |
45-60 |
30-45 |
15-30 |
45-60 |
35-50 |
25-35 |
35-45 |
25-35 |
15-25 |
|
Recovery % Min. |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
80 |
|
Compression Set % Max. |
90 |
90 |
90 |
85 |
85 |
90 |
80 |
85 |
90 |
|
(a) Ph, where applicable |
5.0 to 8.5 |
5.0 to 8.5 |
5.0 to 8.5 |
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|
(b) Chloride content |
0.2% max. |
0.2% max. |
0.2% max. |
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|
(c) Sulphate content |
0.2% max. |
0.2% max. |
0.2% max. |
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|
Oil immersion test, Volume change after immersion in ASTM oil No.3 for 70 hours at 100˚ C temp. |
60% max. |
25% max. |
15% max. |
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|
Note |
Note |
Note |
Note |
|
RC 50A/RC 70A/ RC 80A |
RC 50B/RC 70B/ RC 80B |
RC 50C/RC 70C |
RC 80C |
|
A General Purpose Material having low Oil resistance but good Flex properties. Best Suited for Automotive And Light Electrical Industry |
A good oil resistant for Material having good flex properties and Material high hardness. This is ideally suitable for from fine Automotive industry, for Distribution Transformers and Switchgears and for excellent Oil immersed Starters. |
This is suitable for the Transformers and Engineering applications. A material having high hardness manufactured from cork granules providing excellent oil and heat resistant properties & excellent Compression Set. Widely used by Electricity Boards & Transformer Manufacturers |
This is suitable for Heavy Engineering applications. A material having high hardness manufactured from fine cork granules providing excellent oil, heat and ozone resistant Properties. Its excellent Compression Set and Side Flow properties control lateral spread tendency of ordinary Cork sheets and is therefore, best suitable for outdoor Transformers. Widely Used by Electricity Authorities & Transformer Manufacturers |
Note:
- Cork Grain size/Density can be increased/ decreased as per the customers' requirement. However the prices will be changed accordingly.
- Sheet Sizes available: 915x915mm and 915x610mm.Special sizes can be supplied on customer's request.
- Strip width available: from 25mm to 100 mm.
- Thickness available : from 0.8mm to 25mm
- Colours available: Natural / Black / Red.
- Tested as per National and International Standards.