Viton is DuPont's brand name for FKM fluoroelastomer, used interchangeably with "FKM" on drawings and RFQs. Hongjie molds custom FKM/Viton O-rings by grade, durometer, and dimension to your drawing, then runs a functional prototype before quoting production.
| Spec | Options |
|---|---|
| Durometer | 70, 75, 90 Shore A |
| Cure/Type | Bisphenol-cured (Type A) or peroxide-cured (Type B); GF/GFLT/GLT low-temperature grades on request |
| Color | Black standard; brown and other colors by compound |
| Upgrade path | FFKM for extreme temperature or chemical exposure — confirm grade, media, and documentation before quotation |
Standard FKM/Viton grades typically operate from about –20°C to +230°C. GFLT and GLT grades extend low-temperature performance, while FFKM is used for higher temperatures and more aggressive media.
Across Hongjie’s compound portfolio, rated capability spans –60°C to +325°C, depending on the material. Chemical compatibility is checked against 500+ fluids, gases and chemicals before a grade is approved.
For ethanol-blend fuel applications, see fuel-resistant O-rings. For process-line chemical exposure, see chemical-resistant O-rings.
AS568A and metric O-ring sizing are supported from drawing or standard reference, per ASTM D2000/AS568 material and dimensional classification.
| Dimension Range | Standard Tolerance | Precision Tolerance |
|---|---|---|
| 0–10mm | ±0.10mm | ±0.02mm |
| 10–25mm | ±0.15mm | ±0.05mm |
| 25–50mm | ±0.20mm | ±0.08mm |
| 50–100mm | ±0.25mm | ±0.10mm |
Standard dash sizes are listed under AS568 O-rings by dash size and material. Flat sealing discs compatible with FKM/Viton are covered under custom rubber washers and sealing discs.
Or standard dash number
Fluid, gas or chemical the seal will see
Continuous and peak service range
Static or dynamic sealing duty
70, 75, 90 Shore A, or FFKM
Prototype vs. production quantity
Material certs, FDA/NSF compliance, inspection records
From tooling and prototype development to testing and production, each O-ring program is reviewed according to its geometry, compound and application requirements.
Injection molding and compression molding are available for different O-ring geometries, production volumes and tolerance requirements.
Sizes matching Hongjie’s 3,500+ O-ring tools can often avoid new tooling cost and lead time.
Non-standard geometries require new tooling, quoted separately from the part price.
Upload your drawing for compound and specification review, followed by a functional prototype in 3–5 business days and a production quote.
Samples can be evaluated for hardness, tensile strength, compression set, chemical resistance and accelerated aging.
Sample cost is confirmed during RFQ review according to tooling status and testing requirements.
Bonded construction is available when the O-ring integrates with a metal carrier.
Manufacturing is IATF 16949:2016 and ISO13485:2016 certified, with FDA and NSF compliant material options where required, run under SPC targeting Cpk > 1.33.
Submit a drawing, groove dimension or physical sample to start a custom Viton O-ring quote, or ask about qualifying an existing part for repeat OEM supply.
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