PTFE Packing GF4770

Composition

egPTFE yarns with encapsulated graphite without further lubrication (egPTFE) by GORE®

Characteristics

The packing style GF4770 is made with 100% of pure GORE® yarns. This yarn without lubricant guarantees at the same time great resistance to the extrusion and reduced wear thanks to its low coefficient of friction. The packing style GF4770 is a universal sealing, suitable for both valves and pumps, it is strongly recommended for high pressure reciprocating pumps with huge head. The packing style GF4770 has great performance guaranteeing safety and long service life.

Applications

The packing GF4770 is very versatile and can be used both on the valves and on the reciprocating pumps, for all services compatible with PTFE and graphite.

PTFE Packing GF4770
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  P bar Ibf/in2 Vm/S f/pm pH T°C T°F
500 7500 1 200 0 ÷ 14 -200 ÷ 280 -330 ÷ 540
800 12000 3 600
30 450 8 1600

  • Never use the product at its maximum rated temperature and pressure. Consult the manufacturer for further information.

  • The peak temperature can be sustained only for short exposure periods.

  • Flexible graphite and carbon yarns shall not be used with oxidizing fluids.

sezione mm sezione inch kg/box lbs/box mt/box ft/box mt/kg ft/lbs
3 1/8" 1 2.2 100.0 304.8 100.0 138.4
4 - 1 2.2 50.0 152.4 50.0 69.2
5 3/16" 1 2.2 25.0 76.2 25.0 34.6
6 - 2.5 5.5 50.0 152.4 20.0 27.7
6.5 1/4" 2.5 5.5 41.7 127.1 16.7 23.1
8 5/16" 2.5 5.5 31.3 95.4 12.5 17.3
9.5 3/8" 2.5 5.5 20.8 63.4 8.3 11.5
10 - 2.5 5.5 19.2 58.5 7.7 10.6
11 7/16" 2.5 5.5 15.6 47.5 6.3 8.6
12 - 2.5 5.5 13.2 40.2 5.3 7.3
12.7 1/2" 2.5 5.5 11.9 36.3 4.8 6.6
14 9/16" 5 11 20.0 61.0 4.0 5.5
16 5/8" 5 11 14.7 44.8 2.9 4.1
17.5 - 5 11 13.2 40.2 2.6 3.7
18 11/16" 5 11 11.9 36.3 2.4 3.3
19 3/4" 5 11 10.6 32.3 2.1 2.9
22 7/8" 5 11 8.6 26.2 1.7 2.4
25.5 1" 5 11 6.7 20.4 1.3 1.9

  • The weight per meter and the packaging weight may have a tolerance of ±10%. Other sizes and packaging options are available on request.