O-Rings & Seals
O-Rings
AS568, metric, encapsulated and X-ring profiles in NBR, FKM, EPDM and PTFE systems.
Range overview
Specification and supply scope
O-rings are the standard sealing element for static and dynamic service. The range covers AS568 and metric sizes, encapsulated O-rings for aggressive media, and X-ring profiles for reduced friction and improved sealing in dynamic applications. Material selection is based on media, temperature, pressure and compression-set limits.
- Product types
- 4
- Documents
- 6
- Supply mode
- Made to order
Stock on request
Selection note: AS568, ISO 3601, ASTM D2000. Final dimensions and materials are confirmed on the order acknowledgement and, where required, the certified drawing.
Type 01 · AS568
AS568 O-Rings
Standard AS568 sizes in NBR, FKM and EPDM for general sealing duty.
Typical applications
- Pumps and valves
- Hydraulic systems
- Compressors
- General static sealing
AS568 O-rings are the standard inch-series sealing rings used across industrial equipment. The range covers common dash sizes in NBR, FKM and EPDM, with 70 and 90 Shore A hardness options and temperature limits matched to the elastomer.
- Standard AS568 dash sizes
- NBR, FKM and EPDM compounds
- 70 and 90 Shore A hardness
- Batch traceability and material certificates
- Standards
- AS568 · ISO 3601 · ASTM D2000
- Materials
- NBR · FKM · EPDM
Specification
| Size range | 0.5–26 in ID |
|---|---|
| Cross-section | 0.070–0.275 in |
| Hardness | 70A / 90A |
| Temperature | -40 to 200 °C (material dependent) |
| Standards | AS568, ISO 3601 |
| Traceability | Batch and heat number on request |
Ordering range
| Dash size | ID × CS | Material | Hardness | Part number |
|---|---|---|---|---|
| 110 | 0.487 × 0.103 in | NBR | 70A | BGI-OR-110-N70 |
| 210 | 0.734 × 0.139 in | FKM | 70A | BGI-OR-210-F70 |
| 325 | 2.975 × 0.210 in | EPDM | 70A | BGI-OR-325-E70 |
| 425 | 4.475 × 0.275 in | FKM | 90A | BGI-OR-425-F90 |
Type 02 · ISO 3601
Metric O-Rings
Metric-series O-rings for European and imported equipment.
Typical applications
- Imported machinery
- European process equipment
- Automotive tooling
- General sealing
Metric O-rings are sized in millimetres for European, Asian and imported equipment. The range covers metric ID and cross-section combinations in NBR and FKM, with dimensions verified against ISO 3601 tolerance classes.
- Metric ID and cross-section sizes
- ISO 3601 tolerance classes
- NBR and FKM compounds
- Suitable for imported equipment
- Standards
- ISO 3601 · ASTM D2000 · DIN 3771
- Materials
- NBR · FKM
Specification
| Size range | 5–500 mm ID |
|---|---|
| Cross-section | 1.5–8.0 mm |
| Hardness | 70A / 90A |
| Temperature | -30 to 200 °C (material dependent) |
| Standards | ISO 3601, DIN 3771 |
| Traceability | Batch certificate on request |
Ordering range
| ID × CS | Material | Hardness | Temperature | Part number |
|---|---|---|---|---|
| 20 × 2.5 mm | NBR | 70A | -30 to 100 °C | BGI-ORM-020-25-N70 |
| 50 × 3.0 mm | FKM | 70A | -20 to 200 °C | BGI-ORM-050-30-F70 |
| 100 × 3.5 mm | NBR | 70A | -30 to 100 °C | BGI-ORM-100-35-N70 |
| 200 × 5.0 mm | FKM | 90A | -20 to 200 °C | BGI-ORM-200-50-F90 |
Type 03 · ISO 3601
Encapsulated O-Rings
PTFE-jacketed O-rings for aggressive chemical and solvent service.
Typical applications
- Chemical processing
- Solvent handling
- Pharmaceutical equipment
- Aggressive media
Encapsulated O-rings combine a PTFE or FEP jacket with an elastomer core. The jacket provides chemical resistance while the core maintains sealing force, making them suitable for solvents, acids and aggressive media where standard elastomers would swell or degrade.
- PTFE or FEP jacket
- FKM or silicone core
- Chemical and solvent resistance
- Low friction surface
- Standards
- ISO 3601 · ASTM D2000 · FDA-grade options
- Materials
- PTFE jacket / FKM core · FEP jacket / silicone core
Specification
| Size range | 10–300 mm ID |
|---|---|
| Cross-section | 2.0–6.0 mm |
| Jacket | PTFE or FEP |
| Core | FKM or silicone |
| Temperature | -30 to 200 °C |
| Options | FDA-grade materials |
Ordering range
| ID × CS | Jacket | Core | Temperature | Part number |
|---|---|---|---|---|
| 25 × 3.0 mm | PTFE | FKM | -30 to 200 °C | BGI-ORE-025-30-PTFE |
| 50 × 4.0 mm | PTFE | FKM | -30 to 200 °C | BGI-ORE-050-40-PTFE |
| 100 × 5.0 mm | FEP | Silicone | -30 to 180 °C | BGI-ORE-100-50-FEP |
| 150 × 6.0 mm | FEP | Silicone | -30 to 180 °C | BGI-ORE-150-60-FEP |
Type 04 · ISO 3601
X-Ring / Quad Ring
Four-lobe profile with lower friction and improved dynamic sealing.
Typical applications
- Reciprocating seals
- Rotary equipment
- Valve stems
- Dynamic sealing
X-rings, also called quad rings, use a four-lobe cross-section instead of a round profile. The design reduces friction, resists rolling in dynamic service and provides two sealing surfaces, making it suitable for reciprocating and rotary applications.
- Four-lobe sealing profile
- Lower friction than round O-rings
- Resists rolling in dynamic service
- Two sealing surfaces
- Standards
- ISO 3601 · ASTM D2000 · Manufacturer standard
- Materials
- NBR · FKM
Specification
| Size range | 5–300 mm ID |
|---|---|
| Cross-section | 2.0–6.0 mm |
| Hardness | 70A / 90A |
| Temperature | -30 to 200 °C (material dependent) |
| Profile | Four-lobe X-ring |
| Traceability | Batch certificate on request |
Ordering range
| ID × CS | Material | Hardness | Temperature | Part number |
|---|---|---|---|---|
| 20 × 3.0 mm | NBR | 70A | -30 to 100 °C | BGI-XR-020-30-N70 |
| 50 × 4.0 mm | FKM | 70A | -20 to 200 °C | BGI-XR-050-40-F70 |
| 100 × 5.0 mm | NBR | 70A | -30 to 100 °C | BGI-XR-100-50-N70 |
| 150 × 6.0 mm | FKM | 90A | -20 to 200 °C | BGI-XR-150-60-F90 |
Documentation
Range documents
Datasheets, overviews and general arrangement drawings for this range. Controlled copies are issued with each order.
| Document | Type | Scope | Revision | Date | Action |
|---|---|---|---|---|---|
| O-Rings — Product Overview4 pages · PDF | Product overview | O-Rings & Seals · O-Rings | Rev. 04 | 15 Sept 2026 | Download |
| O-Rings — General Arrangement Drawing1 page · PDF | Drawing | O-Rings & Seals · O-Rings | Rev. 03 | 15 Sept 2026 | Download |
| AS568 O-Rings Datasheet2 pages · PDF | Datasheet | O-Rings & Seals · O-Rings · AS568 O-Rings | Rev. 04 | 15 Sept 2026 | Download |
| Metric O-Rings Datasheet2 pages · PDF | Datasheet | O-Rings & Seals · O-Rings · Metric O-Rings | Rev. 04 | 15 Sept 2026 | Download |
| Encapsulated O-Rings Datasheet2 pages · PDF | Datasheet | O-Rings & Seals · O-Rings · Encapsulated O-Rings | Rev. 04 | 15 Sept 2026 | Download |
| X-Ring / Quad Ring Datasheet2 pages · PDF | Datasheet | O-Rings & Seals · O-Rings · X-Ring / Quad Ring | Rev. 04 | 15 Sept 2026 | Download |
O-Rings & Seals Brochure
Family brochure · 6 pages
Verification
Documented at every release
Material, dimensional and pressure records are matched to the order before shipment. Certificates and test reports are available on request.
Quality and verificationMaterial traceability
Heat-number matched mill certificates and EN 10204 3.1 on request.
Dimensional inspection
Bore, face, bolt circle and envelope checked to drawing.
Pressure testing
Hydrostatic or pneumatic testing to the order specification.
Documented release
Inspection record, packing list and certificate package.
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