A spiral wound gasket (SWG) is a type of semi-metallic gasket used for sealing flange joints. It is manufactured by spirally winding alternating layers of metal strip and a soft filler material. The metal provides structural integrity and resilience, while the filler material ensures leak-tight sealing.
These gaskets are commonly used in critical process applications where extreme pressure, temperature, and chemical exposure demand robust sealing solutions. SWGs are preferred in industries like oil & gas, petrochemical, power generation, and pharmaceuticals. Choosing the best spiral Wound gasket manufacturer in India is essential to ensure consistent performance, durability, and compliance with industry standards in these high-stakes environments.
How Spiral Wound Gaskets Work
The spiral wound design allows the gasket to compress under bolt load, conforming to the flange surface and creating a strong seal. When the system is pressurized, the soft filler material flows slightly to fill surface irregularities, while the metal windings maintain the gasket’s structural shape and integrity.
The centering ring in some variants ensures correct positioning within the flange bore, while the inner ring provides reinforcement and prevents inward buckling under high pressure.
Key Features and Benefits
- High Pressure and Temperature Resistance: Spiral wound gaskets are ideal for temperatures ranging from -200°C to +1000°C and pressures up to 250 bar. This makes them suitable for high-performance environments, especially when sourced from a reliable spiral wound metallic gasket manufacturer in India.
- Leak-Proof Sealing: These gaskets are designed to prevent leaks even in critical systems involving hazardous gases or chemicals, ensuring workplace safety and system reliability. Choosing the right spiral wound metallic gasket manufacturer in India ensures high sealing integrity.
- Corrosion and Chemical Resistance: With the right choice of filler and winding materials, spiral wound gaskets resist corrosion from aggressive chemicals, including acids, solvents, and hydrocarbons.
- Customizable Design: Spiral wound gaskets can be tailored in terms of size, thickness, material, and construction to suit specific flange requirements and industry standards. A leading spiral wound metallic gasket manufacturer in India will offer custom solutions based on the operational environment.
- Durability and Longevity: Their ability to recover and maintain their shape even under fluctuating temperatures and pressures makes them ideal for long-term applications.
- Excellent Load Distribution: The unique spiral design ensures even load distribution, enhancing sealing performance across the entire flange surface and minimizing maintenance needs—an assurance typically offered by a trusted spiral wound metallic gasket manufacturer in India.
Types of Spiral Wound Gaskets
There are several types of spiral wound gaskets, each suited for different operational requirements. Understanding the variants helps in selecting the right one for your application. Whether you’re dealing with standard or custom needs, choosing a top spiral gasket manufacturer in India ensures quality, reliability, and compliance with performance standards.
- Type G – Basic Gasket
This is a simple spiral wound sealing element without inner or outer rings. It’s suitable for tongue-and-groove flanges and other confined flange designs where a centering device is not required - Type CGI – Gasket with Centering and Inner Ring
This is the most commonly used design for raised face flanges. The centering ring aids in proper alignment, while the inner ring adds strength and prevents inward buckling under high pressure. - Type CG – Gasket with Centering Ring
The CG gasket features a centering ring for easy alignment and installation. It is ideal for flat face or raised face flanges that don’t require an inner ring. - Type GI – Gasket with Inner Ring
This type includes a spiral wound sealing element with an inner ring only, used in applications where centering is achieved by the flange design but reinforcement is still necessary. - Custom Types
Manufacturers also offer tailor-made gaskets for non-standard applications, including rectangular shapes, heat exchanger gaskets, and gaskets with integrated bars.
Materials Used in Spiral Wound Gaskets
Filler Materials:
– Graphite: High temperature resistance.
– PTFE: Chemically inert.
– Mica: High-temp, oxidative environments.
– Non-asbestos fillers: Safe and stable.
Winding Materials:
– 316L Stainless Steel
– 304 Stainless Steel
– Monel
– Inconel
– Hastelloy
Ring Materials:
– Carbon Steel
– Stainless Steel
– Alloy Steels
Applications of Spiral Wound Gaskets
Spiral wound gaskets are used across a range of industries where extreme operating conditions demand high-performance sealing. Some key sectors include:
- Oil & Gas
Used in pipeline flanges, refineries, offshore platforms, and valve bodies, these gaskets withstand hydrocarbon environments and high-pressure conditions. - Petrochemical & Chemical Processing
SWGs are perfect for chemical reactors, distillation columns, heat exchangers, and pumps that handle corrosive media and elevated temperatures. - Power Generation
Whether in nuclear, thermal, or renewable power plants, SWGs are used in boilers, turbines, and high-pressure piping systems. - Pharmaceutical Industry
In cleanroom and sterile environments, PTFE-filled SWGs are employed in process lines, filtration units, and reactors. - Water Treatment & Desalination
They are applied in high-pressure pumps, reverse osmosis units, and chemical dosing systems for leak-free sealing. - Food & Beverage
Food-safe variants are used in processing lines, tanks, and valves where hygiene and sealing performance are critical.
Installation Best Practices
To ensure optimal performance and longevity, it’s important to follow proper installation procedures:
- Clean the flange surfaces thoroughly before installation.
- Select the correct type and size of gasket.
- Apply uniform bolt tightening in a star pattern.
- Avoid over-tightening, which may damage the gasket or flange.
- Use a calibrated torque wrench for accurate compression.
Top Manufacturer of Spiral Wound Gaskets in India
India is known for making top-quality gaskets used in many industries. One of the leading companies in this field is Vrushabh Engineering, a trusted Spiral wound gaskets Manufacturer in India. They create strong and reliable gaskets that work well in high-pressure and high-temperature environments.
Vrushabh Engineering makes spiral wound gaskets that follow international standards like ASME and DIN. These gaskets are used in industries such as oil and gas, power plants, and chemical factories. As a well-known Spiral wound gaskets Manufacturer in India, Vrushabh focuses on quality, safety, and customer satisfaction.
Key Strengths:
- Offers custom-made gasket solutions for different industries
- Uses advanced machines for precise manufacturing
- Holds major certifications to ensure high quality
Conclusion
Spiral wound gaskets are a vital part of industrial piping systems, offering strong and reliable sealing even in the toughest conditions. With many types, materials, and sizes available, they can be customized for nearly any industry. Whether handling corrosive chemicals, high-pressure steam, or frequent temperature changes, a well-made spiral wound gasket ensures safe and smooth operation.
Choosing the right type of gasket and the right supplier is important for better system performance and lower maintenance costs. A reliable Spiral wound gaskets Manufacturer in India can provide the quality and support needed for demanding applications. Indian companies, like Vrushabh Engineering, are top Spiral wound gaskets Manufacturers in India, known for delivering world-class solutions that help industries work more efficiently and safely.
