A) Product Name Distribution Transformer Rubberised Cork
B) Raw Material : 2 types : a) TF-PG ( Cork + NBR ) b) High Distortion TF-WORB ( Cork + Special NBR )
C) Purpose 1) Rubberised Corks / Sheets are an excellent “ gasket “ materials , produced by mixing composition cork and rubber BINDER ( ie 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 Ideal for Transformers & switchgears and General electrical industry , making it an ideal materials for wide range of gasket material where application involving oil.
E) Characteristics 1) Natural Property allowing it to recover to it’s initial shape ( Thickness ) by up to 90% ( ASTM F36) . Rubberised Cork is the only material that can compress without lateral spread . This property ensures there is a Relaxation 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 .