Transformer Cork Gasket O-Ring / Cork Gasket Insulation Sheet

  Cork GasketSealing material is compounded with Nitrite (NBR)rubber.This product is suitable for most transformer oils at applicationDate  sheet SerialnumberTest     projectIndexThe test results1Hardness (Shore)80±10           

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Cork Gasket

Sealing material is compounded with Nitrite (NBR)rubber.This product is suitable for most transformer oils at application

Date  sheet
 
Serial

number




Test     project



Index



The test results
1Hardness (Shore)810             82
2Tensile strong       No less than   (MPA02.5               5 



3
Permanent compression deformation
Compression ratio25%
70ºC×22h     Not more than              %



55



38




4
Aging in hot air                 (100ºC×70h) The hardness change
Weight change                            %


0~+10
-10~0


              4
            -2.8


5
water-tolerant   (100ºC×1h )
Volume change                              %


-10~+15


1.8




6
Resistance to 1# standard oil( 70ºC×22h) The hardness change
Volume change              %


-10~+10
0~+10


               2
3.2



7
Volatile oil standard B         (23ºC×24h)
The hardness change
Volume change                                     %


20~0
0~60

             -10
              30
8Temperature index -20ºCto 120ºC

Cork Gasket O Ring for Transformer /Cork Gasket Insulation Sheet
 

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