Liongraf

Liongraf

Liongraf

Description
A highly reliable pump and valve packing based on graphite and PTFE yarn that is thermally stabilised then lubricated with a silicone-free compound. Sections of 6.5mm square and above are of cross-plaited construction; sections below 6.5mm are plaited.

Typical applications
Widely regarded as an economical packing for universal application and the reduction of stockholding requirements. Well proven in the petrochemical, power generation, marine and metallurgical sectors, and by pump and valve manufacturers for OEM installation. It is suitable for duties with steam, condensate, effluents, fuels and oils, acids, alkalis and chemical solutions.

Prime features

  • Strong, durable and extrusion resistant.
  • Reliable over a wide range of duties.
  • Excellent chemical resistance.
  • Low friction with high thermal conductivity.

Chemical properties
Compatible with media in the range pH 0-14, including corrosive fluids and solvents.

Service capabilities – valve stem duties
Maximum operating temperature:  +260°C
Minimum operating temperature:   -100°C.
Maximum system pressure:            12MPa.

Service capabilities – centrifugal pumps and rotary equipment
Maximum operating temperature:  +260°C
Minimum operating temperature:   -100°C.
Maximum shaft speed:                     17.5m/s.
Maximum system pressure:            2MPa.

Service capabilities – reciprocating pumps and rams
Maximum operating temperature:  +260°C
Minimum operating temperature:   -100°C.
Maximum rod speed:                        2m/s.
Maximum system pressure:            8MPa.

How supplied
Ex-stock: all popular square sections from 3mm to 25mm, in boxes containing 8m. Also supplied as split preformed rings and sets. Full fitting instructions are included.

 

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