Asbestos gland packing AFT
AFT (impregnated with a fluoroplastic suspension with talc) is an elastic cord of square or rectangular cross-section, woven of asbestos thread, impregnated with a suspension of fluoroplastic with talc.
Application:
AFT is used in stuffing box seals: fittings working with liquefied gases (oxygen, nitrogen, etc.) and organic products (gasoline, benzene, toluene, acetone, furan, tetrahydrofuran, etc.) at pressure of 150 MPa and temperature from - 200 to +300°С; ethylene -- at pressure of 150 MPa and temperatures up to +250°С, at sliding speed of up to 2 m/s; designed for pumps operating with organic, acidic and alkaline environs, ammonia at pressure and temperature for centrifugal pumps 3 MPa and + 300°С, for piston pumps - 34 MPa and +250°С, at sliding speed - up to 15 and 2 m/s, respectively; used in stuffing box seals of centrifugal pumps pumping sea water at a pressure of 4.5 MPa and temperatures from -2 to +50°C, at sliding speed of up to 10 m/s.
Characteristics:
Density, g/cm3: 1.2
pH of working environment: 1-14
Working environ |
Sealing unit |
Operating temp, °C |
Pressure, MPa |
Sliding speed, m/s |
Liquefied gases, organic products |
Fitting |
from -200 to +300 |
25 |
2 |
Organic products, ammonia, alkaline environs |
Centrifugal pumps |
+300 |
3 |
15 |
Organic products, ammonia, alkaline environs |
Piston pumps |
+250 |
34 |
2 |
Seawater |
Centrifugal pumps |
from -2 to +50 |
4,5 |
10 |
AFT, density 5152-84 - n / m 1.2 g/m3
Size of |
Single layer weaving |
Diagonal weaving |
Multilayer weaving |
|||
Section, mm |
Density, |
Weight, 1 r.m, |
Density, |
Weight, 1 r.m, |
Density, |
Weight, 1 r.m, |
|
g/cm3 |
g |
g/cm3 |
g |
g/cm3 |
g |
4x4 through weaving |
1,5 |
24 |
- |
- |
- |
- |
4x4 |
1,55 |
25 |
- |
- |
- |
- |
5x5 |
1,4 |
35 |
- |
- |
- |
- |
6x6 |
1,53 |
55 |
- |
- |
- |
- |
7x7 |
1,3 |
64 |
- |
- |
- |
- |
8x8 |
1,38 |
88 |
- |
- |
- |
- |
10 х 10 |
1,4 |
140 |
- |
- |
- |
- |
12x12 |
1,27 |
183 |
- |
- |
- |
- |
13 х 13 |
1,33 |
225 |
- |
- |
- |
- |
14x14 |
1,3 |
255 |
- |
- |
- |
- |
16 х 16 |
1,3 |
333 |
- |
- |
1,3 |
333 |
18 х 18 |
1,25 |
405 |
- |
- |
1,3 |
421 |
19x19 |
1,2 |
433 |
1,23 |
444 |
1,2 |
433 |
20x20 |
- |
- |
1,23 |
492 |
- |
- |
22x22 |
- |
- |
1,2 |
581 |
- |
- |
25x25 |
- |
- |
1,2 |
750 |
- |
- |
28x28 |
- |
- |
1,2 |
941 |
- |
- |
30x30 |
- |
- |
1,2 |
1080 |
- |
- |
32x32 |
- |
- |
1,2 |
1229 |
- |
- |
35x35 |
- |
- |
1,2 |
1470 |
- |
- |