Original
By certification 
I. Definition:
it is a kind of braided packing by PTFE fiber, without soaking in PTFE emulsion, or treatment by lubricating oil, therefore it has no other supplements, it is widely used in chemical industry (other than Fluorine gas and alkali metals), pharmacy, food, papermaking, chemical fiber and other industries. It has stable chemical property, well heat resistance, low coefficient of friction, and good wear resistance and so on. But it has some disadvantages as well: it has worse heat conductivity, which will lead to packing leakage because of burning, its thermal expansion coefficient is larger, and therefore, it is easy to creep under certain temperature and pressure, or it may lead to cold-flow and reduce the sealing effect.
Actual application comparison of PTFE and other packing
Liquid |
Axle diameter |
Revolution |
Liquid |
Temperature |
Pressure |
Service life |
|
PTFE packing |
Other seal packing |
||||||
|
32 |
3600 |
Caustic soda |
100 |
9.0 |
60 days |
Oil-impregnated asbestos seal packing for 7 days |
32 |
3600 |
Urea |
130 |
-- |
34 days |
Oil-impregnated asbestos seal packing for 2～5 days |
|
50 |
1750 |
Dibutyl ester |
100 |
2.0 |
14 days |
PTFE-impregnated asbestos seal packing for 1~5 days |
|
34 |
1750 |
Nitric acid |
Room temperature |
-- |
210 days |
Blue asbestos seal packing for 14～21days |
|
34 |
1740 |
Methyl amine |
Room temperature |
7.0 |
96 days |
Blue asbestos seal packing for 14 days |
|
30 |
1700 |
45% sulphuric acid |
77 |
-- |
46 days |
PTFE-impregnated blue asbestos seal packing for 7 days |
|
30 |
1740 |
Chromate |
Room temperature |
4.5 |
60 days |
Blue asbestos seal packing for 30 days |
|
25 |
1750 |
Hydrochloric acid |
Room temperature |
4.0 |
10 days |
Blue asbestos seal packing for 7 days |
|
Pluger pump |
64 |
60/min |
Phenol |
149 |
20.0 |
60 days |
Oil-impregnated asbestos seal packing for 14 days |
Pluger pump |
50 |
60 /min |
Methanal |
Room temperature |
50.0 |
80 days |
Oil-impregnated asbestos seal packing for 14 days |
Valve |
18 |
-- |
50% sulphuric acid |
77 |
-- |
210 days |
Blue asbestos seal packing for 14~21 days |
Valve |
18 |
-- |
sulphuric acid |
-- |
-- |
150 days |
Asbestos seal packing for 10days |
Autoclave |
88 |
400 |
Ethylenediamine |
200 |
4.0 |
720 days |
Babbit gasket for 360days |
Autoclave |
32 |
275 |
60% sulphuric acid |
200 |
50.0 |
60 days |
PTFE raw material strand for 14days |
TECHNIQUE DATA |
Centrifugal separator |
Reciprocating pump |
Valve |
PH VALUE |
0--14 |
||
LINEAR Vg(M/S) |
4 |
2 |
2 |
PRESSURE（Bar） |
20 |
100 |
200 |
WORKING TEMPERATURE |
-200CENTIGRADE ~ 260 CENTIGRADE |
||
DENSITY：g/cm3 |
1.4～1.6 |
||
P-315-1 PTFE (silica gel cored) packing
INCH ″ |
1/8 |
3/16 |
1/4 |
5/16 |
3/8 |
7/16 |
1/2 |
5/8 |
3/4 |
7/8 |
1 |
MM |
3 |
5 |
6 |
8 |
10 |
11 |
12 |
16 |
20 |
22 |
25 |
KG/M |
0.08 |
0.16 |
0.25 |
0.38 |
0.53 |
0.73 |
0.93 |
1.42 |
1.97 |
2.66 |
3.59 |
TECHO is one of the leading manufacturers and suppliers of various sealing products in China. We have skillful and experienced workers in our factory. Now take action to wholesale quality pure ptfe fiber packing made in China with us.
