Description

A dense and flexible packing that is

plaited from a special spun yarn blended

from four synthetic fibres, coated with

graphite. The yarn is impregnated under

controlled condition of heat, pressure and

vacuum, with a high viscosity petroleum-

based lubricant then coated with high

purity flake graphite before plaiting.

Typical applications

High speed rotary pumps on boiler feed

systems in the power generation, marine

and petrochemical industries. Also other

pump and valve duties involving high

temperatures and extreme conditions with

steam, process water and oils.

Prime features

●

Dense, flexible and responsive

packing.

●

Well proven in the power generation

industry.

●

Graphited yarns for low friction, good

thermal conductivity and reduced

fretting.

●

Supalubrication

of yarns

(page 33)

.

Chemical properties

Compatible with media in the range

pH 4-10, including oil, gases and a variety

of chemicals.

Service capabilities

Valve stem duties

Maximum temperature +315°C

Minimum temperature

–

40°C

Max system pressure 20bar

Centrifugal pumps & rotary

equipment

Operating temperatures

As valve stem

Maximum shaft speed 20m/s

Max system pressure 15bar

How supplied

Ex-stock: all popular square sections from

3mm to 25mm, boxed in 8m lengths. Also

supplied as split preformed rings and

sets. Full fitting instructions are included.

Fortuna XA

High speeds and high temperatures