Canrez CRZ-660 FFKM O-Ring: Compound, Equivalents, UK Suppliers
Verified by Rachel Mayfield, Supply Chain Analyst - April 2026
Canrez CRZ-660 is a 75 Shore A perfluoroelastomer (FFKM) manufactured by Canyon Components. It seals continuously to 325°C and is specified for chemical and similar service. US-made FFKM positioned as direct Kalrez 4079 / Chemraz 615 alternative.
Specifications
| Property | Value |
|---|---|
| Compound | CRZ-660 |
| Manufacturer | Canyon Components |
| Maximum continuous temperature | 325°C |
| Minimum temperature | 0°C |
| Hardness | 75 Shore A |
| Colour | Black |
| Material family | US-made FFKM positioned as direct Kalrez 4079 / Chemraz 615 alternative |
Where Canrez CRZ-660 is used
Canrez CRZ-660 is specified for: Chemical, refinery, pharmaceutical.
Canrez CRZ-660 equivalents from other FFKM manufacturers
If Canrez CRZ-660 isn't available, these compounds from competing manufacturers have similar chemistry and operating windows. Always verify against your actual fluid and temperature before substitution.
| Equivalent compound | Manufacturer | Max temp | Hardness | Direct match |
|---|---|---|---|---|
| Kalrez 4079 | DuPont (Chemours) | 316°C | 75 Shore A | ✓ |
| Chemraz 615 | Greene Tweed | 324°C | 75 Shore A | ✓ |
| Simriz SZ487 | Freudenberg-NOK | 300°C | 75 Shore A | ✓ |
Available O-ring sizes
Canrez CRZ-660 is supplied in:
- BS 1806 sizes: BS001 to BS932 (UK / EU standard, imperial-origin metric)
- AS568 sizes: -001 to -932 (US standard, dimensionally identical to BS 1806)
- ISO 3601 sizes: metric IDs from 2 mm to 670 mm with cross-sections 1.0 mm to 7.0 mm
- JIS B 2401: P, G, S series (Japanese OEM equipment)
- Custom / non-standard: built-to-print for OEM applications
For a list of sizes commonly stocked in the UK, see the BS 1806 size chart, ISO 3601 metric chart, or contact a UK seal specialist below.
UK availability
Canrez CRZ-660 is supplied in the UK by FFKM specialists carrying multiple manufacturer lines. Lead time is typically 2-5 working days for stock sizes, 4-8 weeks for custom-moulded sizes. Use the form below to get a quote from a UK FFKM specialist.
References
- Canyon Components — Manufacturer
- ISO 3601 O-ring sizes
- BS 1806
Frequently Asked Questions
What is Canrez CRZ-660 used for?
Canrez CRZ-660 is a 75 Shore A FFKM (perfluoroelastomer) compound from Canyon Components. It is used in Chemical, refinery, pharmaceutical. Continuous service temperature: 0°C to 325°C.
What is the temperature rating of Canrez CRZ-660?
Canrez CRZ-660 has a continuous service temperature range of 0°C to 325°C. Short-term excursions above the maximum are possible but degrade service life.
What is the equivalent of Canrez CRZ-660?
Direct equivalents to Canrez CRZ-660 include: Kalrez 4079, Chemraz 615, Simriz SZ487. Always confirm chemical compatibility against your specific fluid before substitution.
How much does Canrez CRZ-660 cost?
FFKM O-rings such as Canrez CRZ-660 are typically £30 to £500 per piece depending on size, with custom or large-bore parts at the upper end. Get a current quote via the form on this page.
Where can I buy Canrez CRZ-660 in the UK?
Canrez CRZ-660 is supplied in the UK by independent FFKM seal specialists with multi-brand inventory. Lead time is 2-5 working days for stock BS/AS568 sizes, 4-8 weeks for custom-moulded sizes.
References
- Canyon Components — Manufacturer
- ISO 3601 O-ring sizes
- BS 1806