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Sealex

PTFE

SEALEX ®

 

Sealex joint sealant can be used wherever reliable gasketing is required.

• Fume ducts
• Concrete lids
• Glass joints
• Heat exchangers
• Fiberglass reinforced plastic vessels
• Pump or compressor housing flanges
• Steam vessel flanges
• Ceramic joints
• Water systems
• Valves and piping

 

Sealex® joint sealant, specially processed, 100% pure PTFE on a roll, provides soft, highly compressible gasketing for longer life and trouble-free sealing. Its form-in-place versatility also cuts maintenance and storage costs. The high compressibility of Sealex® enables it to effectively fill flange imperfections for a tight, leak-free seal. Under pressure, it provides a very wide, thin ribbon-like joint sealant. Unlike conventional PTFE which is prone to cold flow, Sealex® has good creep resistance and bolt torque retention properties. 

Sealex joint sealant does not support bacterial growth or cause product contamination and is FDA compliant.  It has virtually no shelf-life concerns since PTFE is unaffected by normal environmental conditions. 

Sealex has excellent resistance properties to chemical attack.  It is ideal for most chemical services at temperatures to 500°F (260°C) and pressure to 2,000 psi (138 bar).  It is also suitable for cryogenic use to -321°F (-196°C).

The sealant is available in roll form which helps reduce storage space, and is available in a wide variety of thicknesses and lengths.

Easy to Use Sealex:

Just follow the simple installation instructions.

Select the size Sealex: Use a size with nominal width of between 1/3 and 1/2 of the effective flange sealing width.

    1. Make sure that the sealing flanges are clean.

    2. Cut off a length of Sealex just a little longer than the actual circumference of the
        perimeter of the seal.

    3. Peel off the adhesive protection strip, and press the Sealex into position.  Cross the
        free ends of the Sealex adjacent to the bolt hole.

    4. Bolt up the mating surfaces using the recommended clamping force and bolt
        tightening patterns.

 

Graph Key:
(1) Suitable for gas and liquid
(2) Suitable for liquid only
(3) Refer to Thermoseal’s technical support service

 

Size selection/torques required to seal ANSI 150lb flanges

Nominal
Flange
Size (in)

Number
Bolts
(N)

Bolt
Size
(in)

*Approx.
Sealex
Length (in)

Suggested
Sealex Size
(in)

Sealing
Stress
(lbs/in)

Torque
(lb/ft)

1/2

4

0.5

4.3

3/16

1570

30

3/4

4

0.5

5.2

3/16

1570

30

1

4

0.5

6.2

3/16

1570

30

1-1/4

4

0.5

7.4

3/16

1570

30

1-1/2

4

0.5

8.3

1/4

2140

30

2

4

0.625

10.2

1/4

2140

60

2-1/2

4

0.625

12.2

1/4

2140

60

3

4

0.625

13.9

1/4

2140

60

4

8

0.625

17.9

3/8

2620

60

5

8

0.75

20.9

3/8

2760

100

6

8

0.75

24.1

3/8

2625

100

8

8

0.75

30.9

3/8

2625

100

10

12

0.875

37.9

3/8

2750

160

12

12

0.875

45.4

1/2

3000

160

* Based on mean sealing diameter

 

 


  • Manufactured by: Thermoseal \ Klingersil


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