Transformer Grade Nitrile Rubber
Excellent dielectric oil resistance for transformer and electrical equipment applications
View SpecificationsTransformer Grade Nitrile Rubber
Transformer Grade Nitrile Rubber is an elastomeric material specially formulated to provide superior resistance to dielectric oils and excellent mechanical properties, essential for applications in transformers, switches, and oil-immersed electrical equipment.
With excellent resistance to swelling in oils and a wide operating temperature range, this material is ideal for gaskets, packing, and components in electrical distribution equipment where compatibility with dielectric oils is critical.
Properties for Electrical Applications
Transformer Grade Nitrile Rubber stands out for its exceptional properties in dielectric oil environments:
- Excellent resistance to dielectric oils and hydrocarbons
- High mechanical strength (2350 psi minimum)
- Wide operating temperature range (-20°C to 120°C)
- Low swelling in ASTM3 oil (1.75% maximum)
- Excellent vibration absorption and sealing properties
These properties make it indispensable in transformers, power switches, substation equipment, and any application requiring compatibility with dielectric oils.
Technical Specifications - Transformer Grade Nitrile Rubber
| PARAMETERS | TEST METHOD | SPECIFICATIONS |
|---|---|---|
| SHORE A HARDNESS, Points | ASTM-D2240 | 70 - 75 |
| TENSILE STRENGTH, psi | ASTM-D412 | 2350 MINIMUM |
| ELONGATION, % | ASTM-D412 | 325 MINIMUM |
| TEAR RESISTANCE, DIE C | ASTM-D624 | 35 MINIMUM |
| TEMPERATURE RANGE, (CENTIGRADE) | ASTM-D573 | -20 TO 120°C |
| WEATHERING RESISTANCE | - | GOOD |
| ACOUSTIC INSULATION FACTOR | - | VERY GOOD |
| VIBRATION ABSORPTION | - | VERY GOOD |
| IMPACT ABSORPTION | - | VERY GOOD |
| COMPRESSION SET | - | GOOD |
| PARAMETERS | TEST METHOD | SPECIFICATIONS |
|---|---|---|
| COMPRESSION SET (%) 22 hours @ 100°C | ASTM-D395 | 35 MAXIMUM |
| % CHANGE IN TENSION, in ASTM3 oil, @ 100°C, 72 hours | ASTM-D471 | -27 MAXIMUM |
| % CHANGE IN ELONGATION, in ASTM3 oil @ 100°C, 72 hours | ASTM-D471 | -35 MAXIMUM |
| % VOLUME CHANGE, in ASTM3 oil, @ 100°C, 72 hours | ASTM-D471 | 1.75 MAXIMUM |
| OPERATING TEMPERATURE, in ASTM3 oil, (°C) | ASTM-D471 | FROM -28 TO 120°C |
| SUBSTANCES | TEST METHOD | SPECIFICATIONS |
|---|---|---|
| FATS, OILS, HYDROCARBONS | ASTM-D471 | EXCELLENT |
| CHEMICAL RESISTANCE | ASTM-D471 | GOOD |
Main Applications
Specific uses of Transformer Grade Nitrile Rubber in the electrical industry
Transformers
Gaskets and packing for oil-immersed transformers with dielectric oil.
Power Switches
Components for switches and oil-immersed distribution equipment.
Substation Equipment
Gaskets for electrical equipment in substations and power plants.
Transformer Grade Nitrile Rubber Advantages
Oil Resistance
Excellent resistance to dielectric oils, fats, and hydrocarbons.
Wide Thermal Range
Operates from -28°C to 120°C in oil environments.
High Mechanical Strength
2350 psi tensile strength and excellent durability.
Low Swelling
Only 1.75% maximum volume change in ASTM3 oil.
Vibration Absorption
Excellent vibration absorption and damping properties.
Weather Resistance
Good resistance to deterioration from environmental conditions.
Regulatory Compliance
ASTM D2240
Shore Hardness
ASTM D412
Mechanical Properties
ASTM D471
Chemical Resistance
ASTM D395
Compression Set
Our Transformer Grade Nitrile Rubber complies with international standards for applications in oil-immersed electrical equipment with dielectric oil.
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