High-Quality Double Jacket Gaskets for Sale from China Factory

What is a Double Jacket Gasket?

A Double Jacket Gasket is a high-performance sealing component engineered for extreme service conditions. Unlike standard gaskets, it features a robust metallic core, typically made from materials like 304/316 stainless steel or carbon steel, which is fully enclosed by two layers of a soft, compressible sealing material such as flexible graphite, PTFE, or ceramic fiber. This unique "jacketed" construction creates a formidable barrier, combining the structural strength and blowout resistance of metal with the superior conformability and sealing capability of non-metallic fillers. They are the go-to sealing solution for applications involving high pressure, high temperature, corrosive media, and challenging flange conditions where standard gaskets would fail.

Key Features & Advantages of Kaxite Seals Double Jacket Gaskets

At Kaxite Seals, we manufacture double jacket gaskets to the highest standards, ensuring reliability in the most demanding environments. Our gaskets offer distinct advantages:

• Exceptional Strength & Blowout Resistance: The solid metal core provides immense mechanical strength, preventing gasket failure even under severe pressure surges or system vibrations.
• Superior Sealing Performance: The soft filler layers conform intimately to flange faces, filling in micro-imperfections and creating a leak-tight seal against liquids and gases.
• Wide Chemical Compatibility: By selecting the appropriate filler material (e.g., PTFE for aggressive chemicals, graphite for high temps), our gaskets resist a vast range of corrosive media.
• Excellent Temperature & Pressure Ranges: Designed to perform reliably in continuous service from cryogenic temperatures up to 1500°F (815°C) and pressures exceeding 2200 psi, depending on material combination.
• Long Service Life & Durability: The protective metal jacket shields the softer filler from erosion, oxidation, and physical damage, leading to extended maintenance intervals and reduced downtime.
• Versatility in Design: Available in a full range of standard and custom sizes, various facing materials, and metal core options to match your specific ASME, API, or customer-defined specifications.

Technical Specifications & Product Parameters

Selecting the correct double jacket gasket requires careful consideration of its construction materials and physical parameters. Below are the standard specifications for Kaxite Seals products.

1. Standard Material Combinations

2. Standard Size & Pressure Class Ratings

Kaxite Seals double jacket gaskets are manufactured to fit standard flange dimensions.

3. Typical Physical & Performance Data

• Compression Strength: > 20,000 psi (metal core dependent)
• Recovery (Resilience): 15% - 50% (filler material dependent)
• Sealing Stress: Recommended assembly stress typically ranges from 10,000 to 20,000 psi for optimal sealing.
• Thermal Conductivity: Varies; graphite filler offers high conductivity, PTFE is an excellent insulator.
• Conforms to Standards: ASME B16.20, API 6A, ISO 9001 quality management.

Frequently Asked Questions (FAQ) About Double Jacket Gaskets

Q: When should I choose a double jacket gasket over a spiral wound or a solid metal gasket?
A: Choose a double jacket gasket when you need a robust seal that combines high mechanical strength with excellent conformability. Spiral wound gaskets offer good resilience but may have a higher risk of filler extrusion in very high-pressure, high-temperature services. Solid metal gaskets (like ring type joints) require impeccable flange finishes and are less forgiving. The double jacket design is ideal for uneven or slightly damaged flanges, high vibration, and applications with thermal cycling where a reliable, crush-resistant seal is paramount.

Q: Can Kaxite Seals provide double jacket gaskets for non-standard sizes or special shapes?
A: Absolutely. While we stock a wide range of standard ASME sizes, a core strength of Kaxite Seals is our ability to engineer and manufacture custom gaskets. We can produce gaskets to match odd sizes, special geometries (oval, square, rectangular), and cater to unique OEM specifications. Custom metal core thickness, exotic alloys (Hastelloy, Titanium), and specialized filler blends are also available.

Q: How do I determine the correct material combination for my application?
A: The selection depends on three primary factors: the fluid/media (chemical compatibility), the operating temperature, and the pressure. First, identify the most aggressive chemical in your process and cross-reference it with the chemical resistance charts for fillers like PTFE or graphite. Second, ensure both the metal core and filler materials can withstand your continuous and peak temperatures. Finally, verify that the gasket's pressure class rating meets or exceeds your system's maximum operating pressure. Our technical support team can assist with this analysis.

Q: What is the proper installation procedure for a double jacket gasket?
A: Correct installation is critical. Ensure flange faces are clean, undamaged, and aligned. The gasket should be centered on the flange without any distortion. Use a star-pattern torque sequence when tightening bolts. Gradually tighten bolts to the recommended torque value in multiple passes (typically 30%, 60%, 100% of final torque). This ensures even compression and prevents gasket distortion. Always refer to the flange manufacturer's or Kaxite Seals' provided torque specifications for your specific gasket material and size.

Q: Are double jacket gaskets reusable?
A: Generally, double jacket gaskets are not designed for reuse. During initial installation, the soft filler material compresses and flows to conform to the flange surface, creating a custom seal. Once disassembled, this compression set is permanent, and the gasket will not return to its original thickness. Reusing it will likely result in an inadequate seal and potential leakage. For critical applications, always install a new gasket.

Q: How does Kaxite Seals ensure the quality of its double jacket gaskets?
A: At Kaxite Seals, quality is integrated into every step. We source raw materials from certified suppliers and perform incoming inspections. Our manufacturing processes are controlled and documented. We conduct dimensional inspections using calibrated tools and can provide material traceability documentation for both metallic and non-metallic components. Our quality system is certified to ISO 9001 standards, ensuring consistent, reliable performance in every gasket we ship.

Industries & Typical Applications

Kaxite Seals double jacket gaskets are trusted across a broad spectrum of heavy industries.

• Oil & Gas / Petrochemical: High-pressure piping, heat exchangers, reactor flanges, valve bonnets, wellhead equipment, crude oil pipelines.
• Power Generation: Boiler manways, steam turbine systems, high-temperature and high-pressure steam lines, flue gas ducting.
• Chemical Processing: Agitator shafts, reactor vessels, distillation columns, and piping handling corrosive acids, alkalis, and solvents.
• Pulp & Paper: Digester lids, black liquor recovery boilers, and high-temperature pulp processing equipment.
• Marine & Shipbuilding: Engine exhaust systems, pump flanges, and piping systems exposed to saltwater and harsh conditions.
• Heavy Manufacturing & Metallurgy: Furnace doors, hydraulic systems, and high-temperature processing equipment.