CHESTERTON TYPE 477-1T

Specification of CHESTERTON TYPE 477-1T

477-1T Gland Packing Non Asbestos

Carbon/PTFE GLAND PACKING NON ASBESTOS

Chesterton 477-1T is a tough, yet pliable, continuous filament carbon yarn packing

impregnated throughout with PTFE to provide a non-contaminating, non-staining

carbon yarn packing. 477-1T was developed for tough applications in the pulp and

paper industry. It is specially designed to be used in high pressure feeders, presteaming

vessels and applications that are moving abrasive slurries. The

combination of carbon yarn and PTFE dispersions increases the 477-1T chemical

resistant properties when up against strong caustic and acid mediums.

477-1T is also an excellent bottom anti-extrusion end ring in combination with

1400R in rotating equipment. This combination is ideal when attempting to reduce

or eliminate flush water from a stuffing box.

Technical Data

Temperature Limit:

260°C (500°F)

Pressure Limit:

14 bar g (200 psig)

Shaft Speed:

10 m/s (2000 fpm)

15 m/s (3000 fpm) when used as

a bottom anti-extrusion ring

with 1400R

Chemical Resistance:

pH 0 to 14 except with strong

oxidizers

Applications:

Pulp and paper, pre-steaming

vessels, high and low pressure

feeders, grinding stone,

hydropulpers, agitators

and mixers