Double Jacket Gasket
Product Description
Product Detail
KXT-G2020
DescriptionMetal jacketed gaskets comprise of a thin metallic outer shell enclosing a resilient filler material. The gaskets metal case protects the resilient filler and is resistant to pressure, temperature and corrosion.Metal jacketed gaskets are hand made and are available in many shapes and sizes with a selection of metals and fillers available. Internal ribs of any configuration are available.These gaskets are widely used in heat exchanger applications but require good and even flange surfaces along with high bolt loads to effect a seal.Single jacketed gaskets
have one surface and both OD and ID covered by the metal jacket. Suitable for narrow flange widths in low pressure valve / pump applications.
Double jacketed gaskets
re completely enclosed by a two piece metal jacket covering OD, ID
and both sealing surfaces. Widely used in heat exchanger applications
and suitable for corrosive and high temperature service.
Internal ribs (pass partition bars) can be integral or welded welded as in both types, the primary seal is safely maintained.
Application: those with simple shapes are applied in pipeline flange and
sealing surface of internal-combustion machines, and those with
complicated shapes are used in the flange cover of heat exchanger, etc.
The general gaskets are 10-25 MM wide and 2MM-8MM thick, and can be used
in a maximum work pressure of 6-10Mpa.
Definition: the cladding materials are different metal panels of
0.1MM－0.5MM thick, and the internal cladding materials are made of
non-metal materials.
Normally graphite,PTFE, ceramic and non asbestos are also available.
Jacketed MaterialTin-plate、SS304、316、Copper、aluminum,ect.
Types|
Types of sealing gasket |
Applied in |
|
Metal fully-cladding gasket |
Vacuum sealing position, tower groove flange, valve cover, etc, automobile dynamo |
|
wave-shaped fully-cladding gasket |
High-temperature pipeline, valve, exhaust pipelines, etc. |
|
wave-shaped semi-cladding gasket |
Ignition tower flange, manhole, hand hole, pipeline flange, etc |
|
Round fully-cladding gasket |
Manhole, hand hole, internal-combustion engine, etc. |
|
Metal double-layer fully-cladding gasket |
High-temperature and high-pressure flange, container flange |
|
Metal U-shaped cladding gasket |
Pipeline flange, valve etc |
|
Metal cone-shaped cladding gasket |
Cone parts of air blower |
Choosing metal sheet
|
materials |
maximum temperature (℃) |
remarks |
|
blue asbestos plate |
350 |
With over 90% asbestos fiber (blue asbestos) |
|
asbestos plate (thread, rope, cloth) |
500 |
With over 90% asbestos fiber (chrysotile asbestos) |
|
asbestos rubber plate |
450 |
High-temperature asbestos rubber plate |
|
expansion graphite |
500( oxygen environment ) |
Non-oxygen environment of over800℃ |
|
porcelain fiber plate |
1750 |
--- |
|
PTFE plate |
260 |
--- |
Wave-shaped fully-cladding gasket: (mm)
Characteristics: good elasticity, applicable to the sealing positions of
low preloaded force, and mainly used in the valves, pressure
containers, and tower apparatus, etc of petroleum refining and chemistry
devices.
|
gasket width （W） |
gradient range（P） |
thickness（T） |
|||
|
Below 100 |
3 |
3 |
3 |
-- |
|
|
100￣160 |
3 |
4.5 |
4.5 |
4.5 |
3 |
|
160￣250 |
4.5 |
4.5 |
4.5 |
6.5 |
3 |
|
250￣400 |
4.5 |
4.5 |
4.5 |
6.5 |
3 |
|
400—630 |
4.5 |
6.5 |
6.5 |
6.5 |
3 |
|
630—1000 |
4.5 |
6.5 |
6.5 |
6.5 |
3 |
|
1000--1600 |
-- |
6.5 |
6.5 |
6.5 |
3 |
Pressure （y,Mpa）gasket coeficient table (m) of wave-shaped gasket of different kinds
|
types |
metal types |
gasket coefficient (m) |
pressure （y）Mpa |
|
Metal wave-shaped and asbestos line gasket |
aluminum alloy |
2.5 |
20 |
|
copper and brass copper |
2.8 |
30 |
|
|
soft steel |
3.0 |
35 |
|
|
Monel alloy |
3.3 |
40 |
|
|
Nickel alloy |
3.3 |
40 |
|
|
Stainless steel |
3.5 |
50 |
|
|
Metal fully-cladding sealing gasket |
aluminum |
2.5 |
20 |
|
Red copper, brass copper |
2.8 |
30 |
|
|
soft steel |
3.0 |
35 |
|
|
5Cr--1/2Mo steel |
3.3 |
40 |
|
|
stainless steel |
3.5 |
50 |
|
|
Metal U-shaped cladding gasket (wave-shaped cladding) (full cladding) (semi-cladding) |
aluminum |
3.3 |
40 |
|
Red copper, brass copper |
3.5 |
50 |
|
|
soft steel |
2.8 |
55 |
|
|
5Cr--1/2Mo steel |
3.8 |
65 |
|
|
stainless steel |
3.8 |
65 |
|
|
Monel alloy |
3.5 |
60 |
|
|
Metal round cladding sealing gasket |
aluminum |
3.3 |
40 |
|
Red copper, brass copper |
3.5 |
45 |
|
|
soft steel |
3.8 |
55 |
|
|
5Cr--1/2Mo steel |
3.8 |
65 |
|
|
stainless steel |
3.8 |
65 |
|
|
Monel alloy |
3.5 |
60 |
|
|
Metal double-layer cladding sealing gasket |
aluminum |
4.3 |
50 |
|
Red copper, brass copper |
4.5 |
55 |
|
|
soft steel |
4.8 |
65 |
|
|
5Cr--1/2Mo steel |
4.8 |
80 |
|
|
stainless steel |
4.8 |
80 |
|
|
Monel alloy |
4.5 |
70 |
|
Pressure |
=<6.4MPa |
|
Temperature |
-196℃-700℃(Oxidating=<450℃) |
|
Gasket Factor |
m=3.75 |
|
Minimum Pre-tighten |
y=60MPa |
Gasket materials should never be recommended when both the temperature and the pressure are at the maximums listed. Properties and applications shown are typical. No application should be undertaken by anyone without independent study and evaluation for suitability. Never use more than one gasket in one flange joint, and never reuse a gasket. Improper use or gasket selection could cause property damage and/or serious personal injury. The data reported is a compilation of field testing, field service reports and/or in-house testing. While the utmost care has gone into publishing the information contained herein, we assume no responsibility for errors. The information and specifications contained in this website are subject to change without notice. This revision cancels and obsoletes all previous editions.