Ferrobend Spiral Wound Gaskets with Inner Ring are designed for high-pressure, high-temperature, and vacuum applications. The solid inner ring reinforces the spiral winding, improves compression control, minimizes turbulence, and protects the sealing element against inward buckling during service.
ASME B16.20
300–2500
Material Dependent
High Pressure & Vacuum
½"–60"
Ferrobend
The Inner Ring Spiral Wound Gasket is purpose-built for demanding industrial services where high internal pressure, elevated temperatures, and critical process conditions call for enhanced gasket stability. It combines a precision-formed metallic winding with resilient filler material and a solid metallic inner ring, working together to deliver dependable, long-lasting sealing performance.
The inner ring serves as an internal compression stop while providing essential structural support to the sealing element. It minimizes inward buckling under pressure, shields the spiral winding from erosion caused by high-velocity media, and improves flow characteristics by reducing turbulence within the pipeline — contributing to smoother, more efficient system operation.
Built by Ferrobend from premium-grade stainless steels, nickel alloys, and high-performance filler materials, this gasket is engineered to hold up in the harshest service environments. From refineries and petrochemical plants to power stations, chemical processing units, and offshore platforms, it remains a trusted choice wherever safety and long-term sealing performance cannot be compromised.
The Inner Ring Spiral Wound Gasket incorporates a precision-machined metallic inner ring that strengthens the sealing element, improves structural stability, and provides reliable sealing under severe operating conditions.
The sealing element is manufactured from precision-formed V-shaped metallic strips alternated with soft filler material to provide excellent resilience, recovery, and leak-tight performance.
A solid metallic inner ring reinforces the gasket structure, preventing inward buckling while supporting the winding under high bolt loads and elevated operating pressures.
The inner ring functions as an internal compression limiter, helping maintain uniform gasket compression and extending sealing performance throughout service.
The inner ring protects the sealing element against erosion caused by high-velocity fluids while improving internal flow characteristics by reducing turbulence.
| Property | Description |
|---|---|
| Product Type | Spiral Wound Gasket with Inner Ring |
| Construction | Metallic winding with solid inner ring reinforcement |
| Pressure Range | ASME Class 300 to Class 2500 |
| Temperature Range | Depends on selected winding and filler materials |
| Vacuum Service | Excellent suitability for vacuum applications |
| Heat Resistance | Excellent thermal stability with graphite fillers |
| Compression Control | Enhanced by integrated metallic inner ring |
Solid inner ring provides additional structural reinforcement.
Excellent performance in high-pressure piping systems.
Minimizes inward buckling of the sealing element.
Suitable for elevated temperature and thermal cycling.
Recommended for vacuum and critical process services.
Available in standard ASME sizes and custom dimensions.
Manufactured in accordance with the ASME standard for metallic spiral wound gaskets.
Compatible with ASME raised face and ring-type flange dimensions.
Suitable for European flange systems where specified.
Special dimensions, materials, and configurations available to meet project requirements.
Ferrobend Spiral Wound Gaskets with Inner Ring are manufactured in accordance with international standards and are available in both standard and custom dimensions for demanding industrial applications.
Available for a wide range of piping systems from small process lines to large industrial equipment.
Designed for medium and high-pressure industrial services.
Designed for severe operating conditions requiring reinforced sealing performance.
| Nominal Size | Pressure Class | Construction | Recommended Service |
|---|---|---|---|
| ½" – 12" | 300 / 600 | Inner Ring Spiral Wound | General Process |
| 14" – 24" | 600 / 900 / 1500 | Inner Ring Spiral Wound | High Pressure |
| 26" – 60" | 1500 / 2500 | Heavy Duty Inner Ring | Critical Process Service |
Precision spiral winding manufactured using alternating metallic strip and soft filler material for dependable sealing performance.
Solid metallic inner ring reinforces the gasket structure while preventing buckling and improving operational stability.
Recommended for vacuum systems where additional gasket rigidity and sealing integrity are required.
Produced using precision-controlled manufacturing processes with dimensional inspection throughout production.
Maintains sealing performance at elevated temperatures when suitable winding and filler materials are selected.
The metallic inner ring provides controlled compression and improves gasket stability during tightening.
Excellent resilience and recovery under repeated heating and cooling cycles, reducing leakage risk.
Designed to provide reliable sealing performance in severe industrial operating conditions over extended service periods.
Used in high-pressure pipelines, production facilities, and offshore equipment where dependable sealing is essential.
Suitable for process units operating under elevated pressure and temperature conditions.
Applied in steam lines, turbines, boilers, and auxiliary equipment requiring high-integrity flange sealing.
Provides reliable sealing for aggressive media and demanding chemical process applications.
The reinforced inner ring makes the gasket suitable for vacuum services and low-leakage process systems.
Custom-engineered sealing solutions for industrial machinery, pressure vessels, and critical processing equipment.
Proper installation is essential to ensure optimum sealing performance and prevent damage to the inner ring during assembly.
Ensure flange faces are clean, flat, and free from corrosion, scratches, or foreign material before installation.
Carefully position the gasket so the inner ring remains concentric with the pipe bore and sealing element.
Apply bolt tightening in a recommended cross pattern using the specified torque values to obtain uniform gasket compression.
Verify gasket alignment, flange contact, and bolt tightness before placing the equipment into service.
Keep gaskets in their original protective packaging until installation.
Store in a clean, dry environment away from moisture, chemicals, and direct sunlight.
Avoid bending, dropping, or stacking heavy objects on the gasket during storage and transportation.
Raw materials are inspected and verified before production begins.
Finished gaskets are checked for dimensional accuracy according to applicable standards.
Inspection reports and material certificates are available upon request.
Every gasket undergoes final visual inspection before dispatch.
| Inspection | Purpose |
|---|---|
| Visual Inspection | Verify winding quality, inner ring condition, and workmanship. |
| Dimensional Check | Ensure compliance with applicable dimensional standards. |
| Material Verification | Confirm specified metal and filler material grades. |
| Documentation Review | Verify traceability and quality records before shipment. |
The inner ring improves gasket stability, prevents inward buckling, and provides additional support in high-pressure applications.
Yes. Inner ring spiral wound gaskets are commonly selected for vacuum and low-leakage applications because of their improved structural rigidity.
Oil & gas, petrochemical, power generation, chemical processing, and other critical industrial services.
Yes. Custom sizes, materials, and special constructions can be produced to meet project-specific requirements.
Products are manufactured in accordance with ASME B16.20 and other applicable international standards.
Download engineering documents and technical information for Inner Ring Spiral Wound Gaskets.
Contact Ferrobend for engineering assistance, custom dimensions, special materials, and reliable sealing solutions for critical industrial applications.