Seals & Packing
Die Formed Rings
Graphite & Metal Sealing Rings
We manufacture die-formed rings under high pressure into precise cross-sections, using flexible graphite, graphite-metal composites, or PTFE depending on the service. They go into stuffing boxes as individual packing rings, or into flanged and gland connections as sealing elements. We get asked about these a lot for valve repacks where braided packing won't cut it.
Types & Variants
Flexible Graphite Rings
Die-formed from pure flexible graphite foil. For valve stems, pump glands, and high-temperature rotating equipment up to 650 °C in steam or inert atmosphere (450 °C in air).
Graphite-Metal Composite
Graphite rings reinforced with a metal core or wire insert for higher mechanical strength and blowout resistance.
PTFE Die Rings
Moulded PTFE rings for chemical service where graphite is not compatible. Available in virgin and filled grades.
Common Applications
Valve Packing
Individual rings stacked in a stuffing box to seal gate, globe, and ball valve stems.
Pump Glands
Packing rings for centrifugal and reciprocating pump glands where mechanical seals are not fitted.
Flange Sealing
Used as sealing elements in high-temperature flange connections, particularly in steam and exhaust systems.
Materials & Standards
Materials
- Flexible graphite (99%+ carbon)
- Graphite-metal composite (SS304, SS316 reinforced)
- Virgin PTFE
- Carbon-filled PTFE
Standards
- API 622 — Type testing of process valve packing
- ISO 15848-1 — Fugitive emission testing
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Sheet, Roll & Bulk Stock
Compressed fibre, rubber sheet, PTFE, flexible graphite, engineering plastics, foams, and metal shim, supplied as raw stock for in-house cutting, fabrication, or repair.
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Soft-Cut Gaskets
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Non-metallic gaskets cut to your drawings in compressed fibre, rubber, PTFE, flexible graphite, and other sheet materials.
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Metal Gaskets
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Explore ProductNeed Die-Formed Rings?
Give us the valve or pump model, stem diameter, and what you're sealing against. Standard sizes sit on the shelf; custom profiles we die-form to order.
Request a QuoteDisclaimer
This page is provided for general engineering reference only and does not constitute professional advice, specification, or guarantee of performance. Actual results depend on specific application conditions. Universal Gaskets Pty Ltd accepts no responsibility or liability for decisions made based on this information. For full terms, see our Terms & Conditions.