BF31

BF31

NITRILE SHEETING FOR TRANSFORMER OIL

Overview

Features

High grade NBR.

Benefits

Reliability Safety

Applications

Cutting gaskets for sealing between the tank and the lid of immersed electrical transformers in contact with synthetic dielectric and mineral oils.

No resistance to pyralene.

Advantages

Excellent mechanical properties, compression set in particular
Excellent temperature resistance
Excellent low temperature resistance
Excellent ageing resistance
Excellent hydrocarbons resistance
Matte finish to guarantee a good surface finished quality and to secure an easy unrolling.

Mechanical, Physical and Chemical Properties

Mechanical

Measure characteristic

Standard

Value

Rubber compound - Black

 

Density

1.30 ±0.05

g/cm³

Hardness

ASTM D2240

70 ±5

Shore A

Tensile strength

ISO 37

≥ 13

MPa

Elongation at break

ISO 37

≥ 300

%

Tear resistance, Crescent specimen

ISO 34-1

≥20

N/mm

Compression set after 70h at 100°C

ISO 815-1

≤40

%

 

Temperature

Measure characteristic

Standard

Value

Working temperature

-40/+130

°C

 

Ageing

Measure characteristic

Standard

Value

∆ Tensile strength after 168h at 70°C

ASTM D573

≤-20

%

∆ Elongation at break after 168h at 70°C

ASTM D573

≤-30

%

Oil IRM 903, Δ Tensile strength after 72h at 100°C

ASTM D573

≤-20

%

Oil IRM 903, Δ Elongation at break after 72h at 100°C

ASTM D573

≤-40

%

 

Oil Resistance

Measure characteristic

Standard

Value

Oil IRM 901, ∆ volume after 70h at 100°C

ASTM D471

-20/5

%

Oil IRM 903, ∆ volume after 70h at 100°C

ASTM D471

±5

%

 

Chemical Resistance

Diluted acids and bases

Concentrated acids and bases

Ozone

Oils and hydrocarbons

Very good

Good

Good

Very good

 

Dimensions

Thickness (mm) Width (mm) Length (m) Weight (kg/m2) Sides finish Option

2

±0.3

1400

±2%

15

±2%

2,62

2 sides matt

-

3

±0.3

1400

±2%

10

±2%

3,93

2 sides matt

-

4

±0.4

1400

±2%

10

±2%

5,24

2 sides matt

-

5

±0.4

1400

±2%

10

±2%

6,56

1 side smooth/1 side matt

-

6

±0.5

1400

±2%

10

±2%

7,87

1 side smooth/1 side matt

-

Identification

Branding

Without.

Packaging

Thickness ≤6mm rolled on cardboard tube Ø 80mm.
Thickness >6mm in roll.

Wrapping

Black polyethylene film.

Labelling

Self-adhesive label indicating product name, dimensions, area in m², nominal weight, and product code to allow product traceability.

 

Downloads

Product Sheet

Product Sheet (PDF)  

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