Products
Double Jacketed Gasket

Double Jacketed Gasket

Model:KXT 900
Kaxite KXT 900 is a double jacketed gasket formed by hand and welded, with a soft pliable filler core fully enclosed in a two-piece metal jacket. Choose SS304, SS316, SS321, SS410, soft iron, carbon steel, brass, copper or monel for the jacket, and non-asbestos, graphite or PTFE for the filler. Four styles available: KXT 900 double jacketed, KXT 910 single jacketed, KXT 920 corrugated jacket, KXT 940 single jacket overlap. Standard sizes to ASME B16.20, DIN, JIS, EN, BS or made to your drawing. Used in heat exchangers, boilers, pressure vessels, valve bonnets and pumps. Factory-direct price, material certificate, quotation within 24 hours.
Model KXT 900 · Metal Jacketed Gasket Family

Double Jacketed Gasket for Heat Exchangers, Boilers & Narrow Flanges — SS316 / SS304 / Copper / Monel Jacket, Factory Price

Kaxite KXT 900 is a double jacketed gasket built from a soft pliable filler core fully enclosed in a two-piece metal jacket. The jacket protects the filler from the process medium on both faces, so the gasket holds up in high-temperature, high-pressure and corrosive service where an exposed graphite or PTFE gasket would extrude or degrade. Choose SS304, SS316, SS321, SS410, soft iron, carbon steel, brass, copper or monel for the jacket, and non-asbestos, graphite or PTFE for the filler. Standard sizes to ASME B16.20, DIN, JIS and EN, or made to your drawing. Factory-direct price, custom jacket and filler combinations, quote within 24 hours.

Double Jacketed Gasket KXT 900 KXT 900
How It's Built

Three Layers, One Gasket — and Why It Matters

Layer 01 · Top Metal Jacket — Outer Face

SS304, SS316, SS321, SS410, soft iron, carbon steel, brass, copper or monel. Seals against the flange face and prevents blow-out.

Layer 02 · Core Soft Filler — The Sealing Element

Non-asbestos, expanded graphite or PTFE. Compresses into the flange imperfections and forms the pressure-tight seal.

Layer 03 · Bottom Metal Jacket — Inner Face

Second metal piece folded and welded around the filler, fully enclosing it. Result: no exposed filler, no extrusion path.

Four Jacket Styles — Pick the One Your Flange Needs

All four share the same jacket-and-filler principle, but each style is optimised for a different flange type and pressure/temperature envelope.

KXT 900 Double Jacketed Gasket
KXT 900

Double Jacketed Gasket

Filler fully enclosed in a two-piece metal jacket. Standard choice for high temperature and pressure, and where corrosion on the filler is a risk.

Best for: heat exchangers · boilers · pressure vessels

KXT 910 Single Jacketed Gasket
KXT 910

Single Jacketed Gasket

Filler partially enclosed by a metal jacket. Used on small-diameter openings with narrow flanges where only light bolting can be applied.

Best for: small nozzles · narrow flanges

KXT 920 Corrugated Jacket Gasket
KXT 920

Corrugated Jacket Gasket

Soft filler enclosed by a corrugated metal shell and washer. Designed for the high pressures and temperatures common in oil refinery service.

Best for: oil industry · refinery flanges

KXT 940 Single Jacket Overlap Gasket
KXT 940

Single Jacket Overlap Gasket

Filler fully enclosed in a one-piece metal jacket with an overlap joint. Gives the filler the same protection as a double jacket but with a simpler construction.

Best for: general industrial flanges

Full Specification — KXT 900 Series

All styles below are covered by the same quotation. Send your flange standard, medium and operating conditions and Kaxite will confirm the right jacket and filler pairing.

Table 1 — Jacket, filler and construction options for the KXT 900 metal jacketed gasket family
Parameter Value / Option
Model Kaxite KXT 900 · KXT 910 · KXT 920 · KXT 940
Gasket construction Metal jacket with soft pliable filler core, hand formed and welded
Jacket materials SS304 · SS316 · SS321 · SS410 · Soft iron · Carbon steel · Brass · Copper · Monel
Filler materials Non-asbestos · Expanded graphite · PTFE
Standard sizes ASME B16.20 · DIN · JIS · EN · BS
Custom sizes Made to your drawing or flange dimensions
Pressure range Medium to high pressure, dependent on jacket and filler combination
Temperature range High temperature service — confirm with Kaxite engineers for your medium and jacket choice
Application standards Heat exchangers · boilers · pressure vessels · valve bonnets · pumps · autoclaves
Thickness Standard thicknesses, or matched to your flange dimensions
Quality documentation Material certificate for jacket and filler · dimensional inspection record · batch traceability
Quotation basis Jacket material · Filler material · Size and thickness · Quantity · Destination port

Material Selection — Jacket and Filler Pairings

The jacket and filler work as a pair. Choose the jacket for corrosion and temperature resistance, and the filler for the sealing behaviour your medium needs.

Jacket Material Options

  • SS304
  • SS316
  • SS321
  • SS410
  • Soft iron
  • Carbon steel
  • Brass
  • Copper
  • Monel

Filler Material Options

  • Non-asbestos
  • Expanded graphite
  • PTFE

Not sure which pairing suits your medium? Send the flange standard, process fluid, pressure and temperature and Kaxite will recommend the jacket and filler combination from our standard range.

Where Metal Jacketed Gaskets Are Used

Five industries where the fully enclosed filler gives an advantage over an exposed gasket material.

01 Heat Exchangers
02 Boilers & Flues
03 Pressure Vessels & Autoclaves
04 Valve Bonnets
05 Pumps & Compressors

For higher pressure flange joints where a Kammprofile or spiral wound gasket is required, compare with our spiral wound gaskets. For lower pressure flanges where a soft cut gasket is enough, look at expanded graphite gaskets or PTFE gaskets. For corrugated metal jackets with a graphite or non-asbestos filler, see the corrugated gaskets range. If you are specifying a gasket for a heat exchanger or boiler and want to compare several gasket types side by side, browse the full gaskets catalogue. To purchase this specific double jacketed gasket as a category, browse Double Jacketed Gaskets.

Frequently Asked Questions

What is a Double Jacketed Gasket?
A double jacketed gasket (Kaxite KXT 900) is a metal-clad gasket with a soft pliable filler core fully enclosed by a two-piece metal jacket. The jacket protects the filler from the process medium on both faces and prevents blow-out, while the filler compresses into the flange surface to form the seal. It is used in high-temperature, high-pressure and corrosive service where an exposed gasket material would extrude or degrade.
What is the difference between single and double jacketed gaskets?
In a double jacketed gasket the filler is completely enclosed by metal on both faces. In a single jacketed gasket (KXT 910) the filler is only partially enclosed and a face of the filler is exposed to the flange. Double jacketed gaskets are used for higher temperature and pressure, and where corrosion of the filler must be avoided. Single jacketed gaskets are used on small-diameter openings and narrow flanges where only light bolting is available.
What jacket and filler materials do you supply?
Standard jacket materials are SS304, SS316, SS321, SS410, soft iron, carbon steel, brass, copper and monel. Standard filler materials are non-asbestos, expanded graphite and PTFE. The jacket and filler are chosen as a pair depending on the process medium, temperature and pressure.
What sizes can you supply?
Standard sizes to ASME B16.20, DIN, JIS, EN and BS. Custom sizes are made to your drawing or your flange dimensions. Send the flange standard, nominal size, pressure class and thickness and Kaxite will confirm the exact dimensions.
Where are double jacketed gaskets used?
Typical applications include heat exchangers, boilers and flues, autoclaves and other pressure vessels, valve bonnets, pumps and general industrial flanges. They are particularly suited to narrow flange faces and to services where the filler would be attacked by the process medium if it were exposed.
Do you provide material certificates and quality documentation?
Yes. Every batch ships with material certificates for the jacket and filler, a dimensional inspection record and batch traceability. Additional third-party inspection can be arranged on request.
How do I request a quotation?
Send your jacket material, filler material, size and thickness, quantity and destination port. Kaxite replies within 24 hours with a factory-direct quotation, lead time and packing details.

Need a factory price for a Double Jacketed Gasket? Send your jacket material, filler, flange standard and quantity — Kaxite replies within 24 hours with a factory-direct quotation.

Get Factory Price Now
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Contact Info

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Share your sealing requirement and our technical sales team will respond within 24 business hours. For fastest service, include your flange specification, operating pressure, temperature, and process media in the message below.

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