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Products Center >> Ptfe(Teflon)Series

F-502 expanded ptfe joint sealant rod

I. Definition:
It’s a belt with pure white PTFE product, and a new-type sealing material produced with a unique processing technology, with good capability in flexibility, resilience, creep-free, non-aging and self-lubrication. It is an ideal sealing material for industries of chemical, pharmaceutical, food, electronic power, metallurgy, shipping and so on.

II. Function:
1. Flange surface sealing for heat exchanger, reaction cauldron and reaction towers of stainless steel and titan or metal, as well as enamel lining, glass lining, plastic lining, rubber lining, and graphite lining.

2. Flange surface sealing of pipelines and their fittings.

3. Seal surface of flange, which has less precision machined surface, large uneven area, irregular shape, inadequate bolt tightening or heavy-calibre equipment with too large caliber.

4. Sealing for deep-etching media and liquid cannot be polluted any.

III. Advantages of property:
1. Excellent sealing property. This product has great compressibility, and it is easy to fill the hole and furrows on the surface to be sealed to avoid leakage, what’s more, it can rebound and expand when it is tensioned, so the more pressure in medium, the larger sealing capacity.

2. Convenient for use. Cut a section of seal strap with needed length, cross the ends and it can form a seal circle of any size and shape. The adhesive on one side can fix it on the equipment for easy installation, then it can seal well with little tightening force (the least pretightening force is 50Kgf/cm2).

3. Durable in use. PTFE has good corrosion and weathering resistance. And after special treatment, Green Leaf has better creep resistance, and it can be safely used for a long period in a wide range of temperature.

4. Clean. As the PTFE is a kind of white product, and it has good corrosion and weathering resistance, it will not drop and pollute the contacted liquid.

5. Economical. Other shaped seal gaskets have high cost as they should be cut, chopped, and sprinted, which will cost more material and time; the Green Leaf PTFE seal strap can form a gasket of certain specification as long as you cross connect the both ends of it, without any waste, it can meet your daily requirement by several kinds of seal strap, therefore it saves the cost for storing shaped gaskets of all specifications. Meanwhile, it reduces the requirements for the machine precision of surface to be sealed, and it enable some corroded, eroded, and damaged fittings and equipment to be reused, prolonging their service life and reducing the repair.

IV. Use method:
clean and dry the surface to be sealed, choose PTFE seal strap with suitable width and thickness, then remove its protection paper, stick it to the outer fringe of the surface, fold the connections at the crossing of one bolt, leaving 2CM to the crossing (note: usually 2~3CM, use it on face-flange, the connections of both ends must across fold, if it is used on recessing flange, the connections can be fold parallel, more than 2CM). then fold the flange surface, fasten each bolt, the crossing will be pressed to the same thickness of other part, and there will be no leakage at the crossing.

V. Parameter

Service temperature

-260~316℃

Service pressure

<19.6 MPa

Adaptive medium

All chemical substance other than F and molten metal

Tensile strength

≤30 MPA(4260 PSI)

Density

0.6~0。8 g/cm3

Elongation

≥20%

Creeprelaxation(ASTM F38)

51%  

Seal ability (ASTM F37A)

0.1ml/Hour

 
2. Choose for width

FLANGE SIZE

WIDTH OF THE SEALANT

1/2″

1/8″

3/4~1-1/2″

3/16″

2~4″

1/4″

5~8″

3/8″

10~16″

1/2″

18~24″

5/8″

24~48″

3/4″

>48″

1″


ITEM NO

WIDTH(MM)

THICKNESS (MM)

LENGTH(M/ROLL)

1

3

1.5

30

2

3

2

30

3

5

2

25

4

6

2.5

20

5

7

2.5

20

6

8

3

20

7

9

3

15

8

9

4

15

9

10

3

10

10

10

4

10

11

12

3

10

12

12

4

10

13

12

5

10

14

16

4

10

15

20

3

5

16

20

4

5

17

20

5

5

18

20

6

5

19

20

7

5

20

25

3

5

21

25

4

5

22

25

5

5

23

25

6

5

24

25

7

5

25

25

8

5

26

30

3

5

27

30

4

5

28

30

5

5

29

40

4

5

30

50

3

5

31

50

4

5



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