A) Product Name Distribution Transformer Rubberised Cork
B) Raw Material : Two types : a) TF-PG ( Cork + NBR ) b) High Distortion TF-WORB ( Cork + Special NBR )
C) Purpose 1) Rubberised Corks / Sheets are an excellent “ gasket “material, produced by mixing composition cork and rubber BINDER (i.e. NBR ) to provide unique properties. 2) Rubberised Corks / Sheets are the best substances for transformer applications such as transformer oil gaskets as sealing/gasket material to prevent oil leakage.
D) Scope It is ideal for Transformers & switchgear and the General electrical industry, making it a perfect material for a wide range of gasket materials where the application involves oil.
E) Characteristics 1) Natural Property allows it to recover to its initial shape ( Thickness ) by up to 90% ( ASTM F36). Rubberised Cork is the only material that can compress without lateral spread. This property relieves stress on the flanges to maintain the seal. 2) Asbestos & Polycyclic Aromatic Hydrocarbons ( PAH ) Free & RoHS Compliant. 3) Compression strength exceeds 70 MPa. ( 10,000 psi ) 4) High Tensile strength , Stress range from Model : TF-WORB , 2.5 to 15 MPa. ( 360 to 2,175 psi ) ( ASTM F152 ) Model : TF-PG , 5.5 to 20 MPa. ( 800 to 2,900 psi ) ( ASTM F152 ) 5) Resistance to Temperature from Model : TF-WORB , temp : -40 ° C to +125 ° C Model: TF-PG, temp: -30 ° C to +125 ° C 6) Suitable for fluid contact like Mineral Oil, Natural Ester Oil, Silicone Oil & acceptable for SF 6 Gas contact. 7) EXCELLENT in Oil & Heat Resistant. 8) Hardness ( IRHD ) : Model : TF-WORB ,65 ± 5 Shore A ( ASTM D2240 ) Model : TF-PG , 75 ± 5 Shore A ( ASTM D2240 ) 9) Colour: Light Brownish ( TF-PG ) / Dark Brownish ( High Distortion TF - WORB ) 10) Density : 750~900 Kg/m³ ( ASTM F1315 ) 11) Made In Portugal.