Double Jacket Gasket

Double Jacket Gasket

Double jacket gasket 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.

Model:KXT-G2020

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Product Description

Double Jacket GasketItem No.

KXT-G2020

Description

Metal 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.

Filler Material

Normally graphite,PTFE, ceramic and non asbestos are also available.

Jacketed Material

Tin-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)
outer diameter range(D)

 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

Main Specification of Metal Jacketed Gasket

Pressure

=<6.4MPa

Temperature

 -196℃-700℃(Oxidating=<450℃)

Gasket Factor

m=3.75

Minimum Pre-tighten 

y=60MPa

Warning

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.

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