Metal Jacketed Gasket – High Pressure Suitability and Blow out Resistance

METAL JACKETED GASKET – GOOD RESILIENCE PRESSURES AND CORROSION RESISTANCE

Metal Jacketed Gasket consists of a soft filler encapsulated in a metallic material. The filler material provides compressibility and resilience while the jacket confers compressive strength and blow out resistance.

Metal jacketed gasket is specially designed and widely used for heat exchangers, autoclaves, columns, pressure vessels, flue stacks, boilers, gas mains, valve bonnets, pumps and similar services.

Most of metal jacketed gaskets are supplied in circular form but they can be manufactured to other shapes to suit individual requirements.

TYPES

Single jacketed gasket. This type of gasket is used in air tool applications and engine applications where space is limited, gasket seating surfaces are narrow and relatively low compressive forces are available for seating the gasket.

Single jacketed overlap. Construction of this gasket offers more filler protection than the standard single jacketed design. It is especially useful for applications where the radial dimensions do not allow space for a double jacketed gasket.

Double jacketed gasket. Double-jacketed gaskets are probably the most commonly used style of gaskets in heat exchanger applications. They are also extensively used in standard flanges. Since most double-jacketed gaskets are custom made, there is virtually no limit to size, shape or configuration.

Double jacketed corrugated gasket. The double jacketed corrugated gasket is an improvement on a plain-jacketed gasket. The corrugations on the gasket will provide an additional labyrinth seal. Enhancing its compressive characteristics. Main sealing performance of double-jacketed corrugated gasket still relies on the inner lap.

Double jacketed corrugated with corrugated metal filler. Double jacketed corrugated metal gasket with a corrugated metal filler can be beneficial at temperatures in excess of the range of 900 °F (483 °C) to 1000 °F (538 °C) where the standard soft filler is normally not recommended. This construction has the advantages of the double jacketed corrugated metal gasket and, in addition, since the filler material is normally same as the gasket, the upper temperature limit would be determined by the metal being used. This type of gasket, depending upon metal selected, is designed to be a heat exchanger gasket for high pressure and high temperature applications.

Double jacketed double shell gasket. The double-jacketed double-shelled gasket is similar to the double jacketed gasket. But it uses two shells in the fabrication of the gasket instead of using a shell and a has the advantage of a double lap at both the ID and the OD of the gasket, adding greater stability to the gasket. The construction will withstand higher compressive loads. Double-shell gaskets are normally restricted to use in high pressure applications.

A section diagram of a single jacketed gasket segment on a white background.

Single jacketed gasket section diagram

A section diagram of a single jacketed overlap segment on a white background.

Single jacketed overlap section diagram

A section diagram of a double jacketed gasket segment on a white background.

Double jacketed gasket section diagram

A section diagram of a double jacketed corrugated gasket segment on a white background.

Double jacketed corrugated gasket section diagram

A section diagram of a double jacketed corrugated with corrugated metal filler segment on a white background.

Double jacketed corrugated with corrugated metal filler section diagram

A section diagram of a double jacketed double shell gasket segment on a white background.

Double jacketed double shell gasket section diagram

COMMON SPECIFICATIONS

Jacketed material: carbon steel, copper, soft iron, titanium, monel, inconel, aluminum, SS 50, SS 304, SS 304L, SS 316, SS 316L, SS 321, SS 347, SS 410, SS 430, brass, copper, inconel, etc.

Filler material: non-asbestos, asbestos millboard, expanded grate, ceramic, PTFE, CANF, ePTFE, etc.

Thickness of gaskets: 2 mm to 5 mm (standard thickness 3 mm)

Pressure: ≤ 6.4 MPa.

Temperature: -196 °C to 700 °C (oxidating condition 450 °C).

Least tighten pressure: 60 MPa.

Coefficient: m = 3.75.

Material maximum temperature:

Common Brasses 500 °F Silver 1200 °F

Copper 600 °F Nickel 1400 °F

Aluminum 800 °F SS 430 1400 °F

SS 304 1000 °F Monel 1500 °F

SS 316 1000 °F Stainless Steel, Type 309 SCb 1600 °F

Soft Iron, Low Carbon Steel 1000 °F SS 321 1600 °F

Titanium 1000 °F SS 347 1600 °F

SS 50 1150 °F Inconel 2000 °F

SS 410 1200 °F Hastelloy 2000 °F

Dimensions for Double Jacketed (DJ) Gaskets per ASME B16.20 to Suit ASME B16.5 Flanges

Gasket Outside Diameter (OD) by Class (Click for details)

Dimensions for Double Jacketed (DJ) Gaskets per ASME B16.20 to Suit ASME B16.47 Series A Flanges

Outside Diameter (OD) by Class (Click for details)

Dimensions for Double Jacketed (DJ) Gaskets per ASME B16.20 to Suit ASME B16.47 Series B Flanges

Outside Diameter (OD) by Class (Click for details)

FEATURES

Suitable for narrow flanges

Good blow-out resistance

The metal jacket covering the filler material prevents contamination

Suitable for high temperatures

Ensures high elasticity and recovery

Nearly any dimension and shape can be mode

Economical &.perfect sealing stability

Easy to handle and install

Suitable for high temperature

Suitable for narrow flanges

CLASSICAL APPLICATIONS

Sealing of heat exchangers.

Pipe flanges.

Boilers and process equipment.

Valve Bonnet Gasket.

Autoclaves.

High pressure oil field drilling and production equipment.

Pressure vessels.

Gas and chemical plants.

Heat exchangers with metal gasket structure and yellow metal pipes in the factory.

In heat exchanges

The metal jacketed gasket as the structure of boiler.