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Graphite packing type EGW and EGW/I

Products > Packings for pumps and valves > Graphite packing type EGW and EGW/I

Packing from yarn from exfoliated pure graphite (carbon content, above 98%), led on a cotton rope. Exfoliated graphite, due to its thermal and chemical resistance, self-spreadable properties and good thermal conductivity is perfect for high-temperature braided packing. Substituting inconel reinforcement with a cotton rope lowers mechanical parameters at high temperatures but, as a result, the packing fits more softly into the stuffing box and has a lower friction coefficient. The version with the symbol EGW/I is additionally enriched with a high quality corrosion inhibitor.

Application

Graphite packing is used in rotor pumps, working with high speed up to 25 m/s, mainly in the chemical and power industries:

  • for chemically aggressive agent pumps in the power industry,
  • sealing high-temperature pumps feeding boilers in the petrochemical industry.

Technical parameters

DESCRIPTION OF PARAMETER

VALUE

TYPE

EGW and EGW/I

Maximum operation temperature in °C

450 (in anaerobic conditions, up to 2500)

Minimum use temperature in °C

- 240

Scope of pH

0 – 14

Type of reinforcement

-

Density in g/cm3

1,2 ± 15 %

Centrifugal pumps

p=40 bar

v=25 m/s

Fittings

p=200 bar

v=2 m/s

Colour

black

Dimensional range in mm

4 – 50

Special versions

EGW+R – with elastomer core
EWG/R – reinforced with carbon yarn on the corners

Commercial packaging

6-16 mm – roll at least 2 kg
17-50 mm – roll at least 5 kg