Application
Properties
Application
- Sealmax Style 940M – Mill Type PTFE Envelope Gasket is manufactured by wrapping a PTFE sheet around a soft compressible filler, forming a continuous folded (milled) PTFE envelope without slits.
- This construction ensures complete PTFE coverage on all sealing surfaces, providing superior chemical resistance while the insert offers resilience and sealing strength
- Style 940M envelopes are preferred where higher integrity, better creep resistance and longer service life are required compared to slit type designs.
- Style 940M is suitable for Chemical Processing Equipment, Pharmaceutical and biotech plants, Food & beverage processing units, petrochemical and refinery services, Glass-lined reactors and fragile flange joints, corrosive fluid pipelines and vessels etc.
Properties
- Excellent chemical resistance.
- Continuous PTFE envelope (no slit exposure).
- Better creep resistance than slit type.
- Excellent sealing at low to moderate bolt loads
- Non – toxic and non-contaminating
- Suitable for glass-lined and brittle flanges
- Smooth, low-friction sealing surface
- Food Grade
|
Technical Specifications
|
||||
|
SR.NO.
|
PROPERTIES
|
UNIT
|
Test Method Reference
|
Specified Values
|
|
1.
|
Density
|
gm/cm3
|
ASTM D-792
|
2.15 – 2.20
|
|
2.
|
Tensile Strength (Min.)
|
Mpa
|
ASTMD-638
|
20 – 30
|
|
3.
|
Hardness
|
–
|
Shore D
|
60
|
|
4.
|
pH range
|
–
|
–
|
0- 14
|
|
5.
|
Maintenance factor (m)
|
–
|
–
|
2.5
|
|
6.
|
Seating stress (y)
|
–
|
–
|
1500 psi
|
|
General Specifications
|
|||
|
SR.NO.
|
Parameters
|
Specifications
|
Remarks
|
|
1.
|
Material
|
100% Virgin PTFE
|
–
|
|
2.
|
Colour
|
White
|
–
|
|
3.
|
Operating Temperature
|
Max 260⁰ C
|
–
|
|
4.
|
Pressure range
|
Upto 60 bar
|
Depends on insert and service conditions
|
|
5.
|
Size range
|
DN 15 to DN 600 and above
|
Customized sizes on request(Fused Type is available for bigger sizes)
|
|
6.
|
Available thickness
|
0.5mm to 6.0mm
|
Customized on requests
|
|
7.
|
Available inserts
|
CNAF, Rubber, Graphite
|
Customized insert on request
|