Coru353 is a Nitrile / Neoprene Rubber bonded TRANSFORMER GRADE Cork jointing sheet is a high industrial grade for arduous applications such as transformer, automotive and industrial gaskets. Excellent resistance to transformer oils and fuels coupled with high resilience, flexibility and compression characteristics.
N.B. Available in plain or self-adhesive backed tape (SAB) alternatives. Bespoke sheets and gaskets are available, as well as customised rubber strips. Email your enquiries to sales@coruba.co.uk.
TRANSFORMER GRADE PER IS-4253 PART II 1988 - ASTM F104
PROPERTIES |
TEST METHOD |
VALUES FPS UNITS |
TEST METHOD |
VALUES METRIC UNITS |
HARDNESS SHORE-A (IRHD) |
ASTM D1415 |
70±5 |
|
|
TENSILE STRENGTH (MPA) |
ASTM F152 |
2.0 MIN |
|
|
ELONGATION AT BREAK |
|
Excellent |
|
|
COMPRESSIBILITY % @ 2.76 MPA |
ASTM F36 |
25-35% |
|
|
RECOVERY % (MIN) |
ASTM F36 |
80 |
|
|
PERCENTAGE VOLUME CHANGE AFTER IMMERSION |
|
|
|
|
ASTM OIL NO. 1 (AT 110 DEG. C. 72 HOURS) |
ASTM F146 |
-5 TO + 10 |
|
|
ASTM OIL NO. 3 OR IRM 903 (AT 110 DEG. C. 72 HOURS) |
ASTM F146 |
-5 TO + 10 |
|
|
OIL RESISTANCE |
|
EXCELLENT |
|
|
ASTM FUEL A (AT AMBIENT TEMPRATURE. 22 HOURS) BS148 TRANSFORMER OIL, 15 DAYS @ 90°C |
ASTM F146 |
0 TO + 10 |
ASTM F146 |
+8 |
SEAL ABILITY OF GASKET MATERIA |
ASTM F37 |
ZERO LEAK RATE (ML/H) |
|
|
FLEXIBILITY WHEN BENT AROUND A 4 X GASKET THICKNESS DIA. MANDREL NO CRACKS THE GASKET MATERIAL SHALL REMAIN FLEXIBLE DOWN TO–15°C |
ASTM F147 |
|
|
|
TEMPERATURE RANGE |
|
-30 to +110°C |
|
|
MATERIAL |
|
|
|
|
RUBBER |
|
NBR/CR |
|
|
GRANULATED CORK |
|
0.5 / 1.0 MM |
|
|
COLOUR |
|
NATURAL |
Special Price | No |
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Resistance to | Please Call |
Insertion Req | No |
Product Type | Anti Slip |
Solid | Yes |
Drainage Holes | No |
Download Document |
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