Pure PTFE Fiber Packing

Product Detail

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      device	Axle diameter      mm	Revolution      r/min	Liquid	Temperature    ?	Pressure      Mpa	Service life
						PTFE packing	Other seal packing
Centrifugal pump	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.