Spiral Wound Gasket with Inner Ring
Ferrobend Spiral Wound Gaskets with Inner Ring are designed for high-pressure, high-temperature, vacuum, and critical industrial applications. The solid inner ring reinforces the spiral winding, improves compression control, minimizes inward movement, and protects the sealing element during service.
Product Overview
A metallic winding and resilient filler reinforced by a solid inner ring. The ring supports the gasket bore, reduces inward winding movement and protects against process-media effects.
| Product type | Semi-metallic spiral wound gasket |
|---|---|
| Construction | Metallic winding and filler with solid inner ring reinforcement. |
| Standard / design basis | ASME B16.20; other configurations as specified below |
| Nominal size range | ½" to 60" nominal sizes; custom dimensions available |
| Pressure classes | ASME Classes 300, 600, 900, 1500 and 2500 |
| Winding material | Stainless steel and selected alloys; available grades listed below |
| Filler material | Graphite, PTFE and other listed fillers, selected for the service |
| Ring arrangement | Inner ring |
Standards, Dimensions & Pressure Classes
| ASME B16.20 | Applicable metallic gasket requirements for spiral wound gasket construction. |
|---|---|
| ASME B16.5 | Compatible with applicable ASME flange dimensions and pressure classes. |
| Custom Engineering | Special dimensions, materials, and configurations are available according to application requirements. |
Sizes & pressure classes
- Nominal sizes
- ½" to 60" nominal sizes; custom dimensions available
- Pressure classes
- ASME Classes 300, 600, 900, 1500 and 2500
- Flange compatibility
- Applicable ASME B16.5 flange dimensions; confirm facing and gasket arrangement for the service.
Use the selected standard, flange dimensions and ring configuration together. Confirm each size / class combination and custom geometry before ordering.
International references are subject to the specified configuration. Confirm the exact standard and drawing with the enquiry.
Technical Specifications
| Sealing element | Alternating precision-formed metallic strip and selected resilient filler. |
|---|---|
| Inner ring function | Radial support, internal compression boundary and protection at the gasket bore. |
| Vacuum capability | Suitable for specified vacuum applications requiring additional rigidity. |
| Thermal cycling | Recovery during repeated heating and cooling with compatible materials. |
| Service life | Dependent on correct material selection, gasket design and installation. |
| Temperature capability | Dependent on selected winding and filler materials |
| Pressure capability | ASME Classes 300, 600, 900, 1500 and 2500; suitability depends on gasket design and operating conditions. |
| Flange compatibility | Applicable ASME B16.5 flange dimensions; confirm facing and gasket arrangement for the service. |
| Manufacturing | Controlled winding and dimensional inspection throughout production. |
Temperature, pressure and chemical suitability must be considered together for the selected winding, filler and flange joint. Confirm the required thickness and service limits with the enquiry.
Quality & Testing
| Visual Inspection | Verify winding quality, inner ring condition, and general workmanship. |
|---|---|
| Dimensional Check | Ensure compliance with specified dimensional requirements. |
| Material Verification | Confirm specified metallic and filler material grades. Incoming raw materials are also checked before production. |
| Documentation Review | Verify traceability and quality records before dispatch. |
Finished gaskets receive final inspection before dispatch. Material certificates and inspection documentation are available on request.
Downloads & Documents
Browse the existing online guides, or request product-specific documents from our team.
Frequently Asked Questions
Which pressure classes and sizes are available?
ASME Classes 300, 600, 900, 1500 and 2500. The stated nominal size range is ½" to 60"; custom sizes are available. Confirm the size / class combination for the selected standard.
Which materials can be supplied?
Choose from the component-specific winding, filler and ring options listed above. Final material selection depends on the process media and service conditions.
Which standards are supported?
ASME B16.20 is listed as the primary gasket standard. Other dimensional or flange configurations remain subject to the project-specific requirements shown above.
Can custom sizes and configurations be supplied?
Yes. Custom dimensions and material combinations are available to project requirements. Confirm the flange geometry and service conditions with the enquiry.
How should the gasket be installed and stored?
Follow the product-specific positioning and tightening steps above. Keep unused gaskets in their original packaging in a clean, dry location away from moisture, chemicals and direct sunlight. Protect them from bending and heavy loads.
Can the inner-ring design be used in vacuum service?
It can be selected for specified vacuum applications when the gasket construction and materials suit the service conditions.
Get a quote for your gasket configuration
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