Neoprene / Nitrile Bonded Cork Transformer Grade 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