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James Walker® Gaskets & Jointings > Supagraf® expanded graphite



  Supagraf® expanded graphite
Supagraf® Plain Jointing & Ultra High Purity
 
DESCRIPTION
Sheet jointing of 98% pure exfoliated graphite. An Ultra High Purity (99.8%) grade is available for nuclear industry applications.

PRIME FEATURES
• Widest temperature range.
• Potable water duties and repeated use with foodstuffs.
• Very easy to cut – but large gaskets may need support during carriage and fitting.

SPECIFICATION
WRAS approved for use with hot and cold potable water up to 85°C.
 
PHYSICAL PROPERTIES
(Typical values for 1.5mm thick sheet)
 Density, Mg/m3    1.0    
 Compressibility, %    49    (ASTM F36A)  
 Recovery, %    16    (ASTM F36A)  
 Leachable chloride ion content, ppm    <50    
 
SERVICE CAPABILITY
 Maximum temperature (oxidising media)    400°C  
 Maximum temperature (*inert/reducing media)    2500°C  
 Minimum temperature    –200°C  
(* Ensure that temperatures above 400°C on atmosphere side of flange do not cause gasket to oxidise inwards from outside edge.)
 
HOW SUPPLIED
Precision cut gaskets to any shape, size and quantity. In sheets: 1m x 1m, 0.5m x 1m. Sheet thicknesses: 1.0mm, 1.5mm, 2.0mm, 3.0mm. Rolls up to 60m long; widths 1.0m. Roll thickness: 0.5mm.