VG4

VG4

Vulcan Seals Type VG4 is a 100% pure Graphite Gland Packing which is capable of near universal application. VG4 is inter-braided from pure Graphite yarn impregnated fibre by fibre with pure Graphite powder. The Graphite powder increases the natural sealing effect of the Graphite yarns and acts as a surface lubricant top produce a virtually non-scoring Gland Packing.

Graphite fibre is superior to any other yarn in the degree to which it combines outstanding Gland Packing properties, namely; excellent thermal conduction, smooth running, near universal chemical resistance and extreme temperature capability. The use of Vulcan Seals Type VG4 pure Graphite fibre Gland Packing provides the opportunity to extend the use of the packed gland into extreme areas of speed, temperature and chemical resistance. In more normal applications, the quality of Type VG4 will result in maintenance savings many times in excess of the actual Gland Packing cost.

Type VG4 standard spool length is 8 metres. Custom lengths can be available - please contact us using the form.

Features
  • Impregnated fibre by fibre with pure Graphite powder
  • Excellent thermal conduction, smooth running and near universal chemical resistance
  • Suitable for pumps and valves in extreme conditions
  • Suitable and certified for use in nuclear power plants
Operating Limits
  • Pressure Rating: 300 Bar
  • Rotary Speed: 20 m/s
  • Temperature: Up to 427˚C in oxidising environments
  • Temperature: Up to 2760˚C in inert environments
  • pH Range: 1 - 13

Limits are for guidance only. Product performance is dependent on materials and other operating conditions.

100% pure flexible expanded graphite yarns high Carbon content.

Compatible with media in the range pH 0-14, excluding strong oxidizing agents.

Negligible volatile content.

Low in extractable trace impurities such as chloride and sulphur.

size

For pumps and valves in extreme conditions or where the value of the best quality Gland Packing can be realised. Universal chemical resistance (sole exceptions are fuming nitric acid, oleum, aqua regia and fluorine). Suitable and certified for use in nuclear power plants. Percentage of soluble chloride is less than 50ppm.