Custom Spiral Wound Gaskets Manufacturer for Bulk OEM and Export Services from China
In the demanding world of industrial sealing, where pressure, temperature, and media compatibility are critical, the choice of gasket can determine the success or failure of an operation. For over four decades, Kaxite Seals has been at the forefront of sealing technology, developing solutions that meet the most stringent international standards. Among our flagship products, Spiral Wound Gaskets stand out as the premier choice for high-performance sealing in flanged connections across diverse industries, from oil & gas and petrochemicals to power generation and pharmaceuticals.
A Spiral Wound Gasket is a semi-metallic sealing element constructed by winding a pre-formed metal strip (the windings) and a soft filler material in a V-shape around a central metal ring (the centering ring). This unique spiral construction creates a resilient, spring-like structure that compensates for flange rotation, bolt stress relaxation, and thermal cycling. When compressed between flanges, the metal windings provide structural strength and resilience, while the filler material flows to create a tight, leak-proof seal. This combination makes them exceptionally reliable for a wide range of pressures and temperatures.
Key Features and Advantages of Kaxite Seals Spiral Wound Gaskets
- Exceptional Resilience & Recovery: The spiral wound design acts like a spring, maintaining sealing force under variable pressures and temperatures, even after long periods of operation.
- Wide Pressure & Temperature Range: Capable of performing reliably from high vacuum to extremely high pressures (up to 25,000 psi / 1,725 bar) and from cryogenic temperatures to over 1000°C (1832°F), depending on material selection.
- Superior Chemical Compatibility: By selecting appropriate metal and filler material combinations, our gaskets resist corrosion and degradation from a vast array of aggressive media, including acids, alkalis, hydrocarbons, and steam.
- Flange Stress Protection: The design helps distribute bolt load evenly, reducing the risk of flange warping or damage, especially in high-pressure applications.
- Custom Engineering: At Kaxite Seals, we don't just sell standard parts. We engineer sealing solutions. Every gasket can be customized in terms of materials, size, and design to match your specific flange, service conditions, and standards (ASME B16.20, API 6A, DIN, etc.).
Detailed Product Parameters & Specifications
Understanding the specifications is crucial for selecting the correct gasket. Below are the core parameters that define Kaxite Seals Spiral Wound Gaskets.
1. Standard Materials of Construction
The performance is dictated by the combination of metal winding and filler material. Our standard offerings include:
| Metal Winding Material | Typical Filler Material | Primary Applications & Benefits |
|---|---|---|
| 304 / 316 Stainless Steel | Flexible Graphite, PTFE, Ceramic, Mica | General purpose, excellent corrosion resistance. Graphite for high temps, PTFE for chemicals. |
| Alloy 20 / Hastelloy C276 | Flexible Graphite, PTFE | Severe corrosive environments (sulfuric acid, chlorides). |
| Monel / Inconel 600/625 | Flexible Graphite | High-temperature steam, caustic services, and offshore applications. |
| Titanium | Flexible Graphite | Chloride and oxidizing acid services. |
| Carbon Steel | Flexible Graphite, Mica | High-temperature hydrocarbon services (non-corrosive). |
2. Standard Sizes, Pressure Classes, and Styles
Kaxite Seals gaskets are manufactured to fit all standard and many special flange configurations.
| Parameter | Specifications |
|---|---|
| Flange Standards | ASME B16.5, B16.47 Series A & B, API 6A, DIN EN 1092-1, JIS, BS, and custom sizes. |
| Nominal Pipe Size (NPS) | From ½" (15 mm) to 60" (1500 mm) and beyond. |
| Pressure Class Ratings | Class 150, 300, 400, 600, 900, 1500, 2500 (ASME); PN 6, 10, 16, 25, 40, 63, 100, 160, 250, 400 (DIN). |
| Standard Styles |
|
| Gasket Density & Thickness | Standard thickness: 3.2 mm (1/8") and 4.5 mm (11/64"). Custom densities and thicknesses available for optimal sealing performance. |
Spiral Wound Gaskets: Frequently Asked Questions (FAQ)
Q: What are the main factors to consider when selecting a Spiral Wound Gasket?
A: The selection is based on the "P.T.A.M." criteria: Pressure (operating and test pressure), Temperature (both operating and ambient), Application Media (the chemical composition of the fluid or gas being sealed), and Flange Material & Condition (type of flange, surface finish, and bolt load). Consulting with Kaxite Seals engineers ensures all factors are evaluated for a safe and reliable selection.
Q: Can Spiral Wound Gaskets be reused?
A: It is generally not recommended to reuse spiral wound gaskets. Once compressed during installation, the filler material has deformed, and the metal windings have taken a set. Reusing an old gasket compromises its resilience and sealing capability, significantly increasing the risk of leakage. For reliability and safety, always install a new, certified gasket from Kaxite Seals during maintenance.
Q: How do I properly install a Spiral Wound Gasket?
A: Correct installation is critical. Ensure flanges are clean, undamaged, and aligned. Place the gasket centered on the flange face. Use a cross-bolt tightening pattern (torquing in multiple passes) to apply even, gradual compression across the flange. Always follow the recommended bolt torque values specified by the flange manufacturer or engineering standards. Under-torquing can cause leakage; over-torquing can crush the gasket and damage the flange.
Q: What is the difference between Flexible Graphite and PTFE filler?
A: The filler is key to chemical and temperature resistance. Flexible Graphite offers excellent thermal conductivity, is highly chemically inert (except strong oxidizers), and can withstand temperatures from -200°C to 500°C (in inert atmospheres, up to 3000°C). PTFE (Teflon) provides superb chemical resistance to virtually all industrial chemicals but has a lower temperature limit (typically -260°C to +260°C). The choice depends on the specific service conditions.
Q: What certifications do Kaxite Seals Spiral Wound Gaskets carry?
A: Kaxite Seals is committed to quality and safety. Our manufacturing process and products are certified to international standards, including ISO 9001:2015 for Quality Management Systems. Our gaskets are manufactured in compliance with ASME B16.20 and API 6A specifications. We also provide material traceability with Mill Test Certificates (MTCs) or Certificates of Conformity (CoC) for full quality assurance.
Q: Do you offer gaskets for heat exchangers and special applications?
A: Absolutely. Beyond standard pipe flanges, we specialize in gaskets for heat exchanger (TEMA/HEI standards), valve bonnets, pump casings, and reactor manways. We can produce non-standard shapes, jacketed gaskets for severe services, and kammprofile gaskets with a spiral wound core for the most challenging conditions. Send us your drawings or specifications for a tailored solution.
Q: How does Kaxite Seals ensure the quality and durability of its gaskets?
A: Quality is engineered into every step. We start with rigorously tested raw materials. Our state-of-the-art CNC winding machines ensure precise, consistent winding density and tension. Every gasket undergoes dimensional inspection and visual examination. For critical services, we can perform specialized testing like helium leak tests. Our decades of experience allow us to provide not just a product, but engineering support for your sealing challenges.
Ordering and Customization with Kaxite Seals
Procuring the right spiral wound gasket is straightforward with Kaxite Seals. To request a quote or technical consultation, please provide the following information:
- Flange Standard (e.g., ASME B16.5, DIN PN40)
- Nominal Pipe Size and Pressure Class
- Service Conditions: Fluid Media, Operating Temperature & Pressure
- Preferred Style (R, V, N) and Material Combination
- Quantity Required
- Any relevant drawings or specification sheets
Our technical team is ready to review your requirements and recommend the optimal Spiral Wound Gasket configuration to ensure long-lasting, leak-free performance in your application.
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