Eutsler Custom Elastomer O-Ring Products
Introduction
Eutsler Technical Products designs and manufactures custom elastomer O-rings for critical sealing applications across industries including oil & gas, aerospace, automotive, industrial, and energy systems.
Our O-Ring Technology integrates:
- In-house compound formulation tuned for chemical, temperature, and pressure extremes
- Precision molding and post-cure control for dimensional consistency and surface integrity
- Comprehensive QA validation ensuring long-term sealing reliability
Every O-ring we produce is engineered, tested, and certified to perform under the harshest service environments—from deep-well packers to aerospace hydraulics.
Core Design Features
Custom Material Formulation
- Elastomers tailored to resist hydrocarbons, acids, amines, water, and steam
- Proprietary compounds developed for compression set resistance and low gas permeability
- Reinforced compounds for high modulus and extrusion resistance
Dimensional Precision
- Manufactured to ARPM O-ring tolerance standards
- Tight dimensional control for cross-section, ID, and concentricity
- Optional surface treatments for low-friction or dry-film lubrication
Engineered for Application Conditions
- Static and dynamic sealing geometries optimized using finite element analysis (FEA)
- Dual-hardness and multi-durometer designs for compression and extrusion balance
- Tested sealing behavior under pressure cycling, vacuum, and fluid exposure
Material & Compound Options
| Elastomer Family | Examples | Performance Highlights |
|---|---|---|
| Hydrocarbon Resistant | NBR, HNBR, XNBR | Excellent fuel, oil, and amine resistance |
| Chemical & High-Temp | FKM, FFKM, TFEP | Superior chemical and thermal stability up to 500 °F |
| Steam & Polar Fluid Service | EPDM, CSM | Excellent for hot water, steam, and polar environments |
| General Purpose | NR, SBR, CR | High resilience and fatigue resistance |
| Low-Temperature Flexibility | VMQ, FVMQ | Maintains elasticity to –75 °F |
| Gas & Vacuum Applications | IIR, BIIR | Extremely low gas permeability |
Each compound is custom-mixed and tested in-house to verify:
- Hardness (±5 Shore A tolerance)
- Compression set
- Tensile, elongation, and tear strength
- Cure rheology and Mooney viscosity
Manufacturing Capabilities
Precision Molding
- Compression, transfer, and injection molding for sizes from micro-O-rings to 24 in+ diameter seals
- Multi-cavity tooling for production efficiency
- Flash-free molding with vent optimization for surface finish integrity
Finishing & Post-Cure
- Controlled post-cure ovens (±3 °F uniformity) for outgassing and stabilization
- Cryogenic or mechanical deflashing for sharp edges and clean surfaces
- Polishing, lubrication, or coating as specified
Inspection
- Optical comparators and vision inspection for dimensional verification
- 100 % visual inspection for surface defects and voids
Testing & Validation
All O-rings are verified per ASTM standards:
| Property | Standard | Typical Range / Target |
|---|---|---|
| Hardness | ASTM D2240 | 30 – 95 Shore A |
| Tensile Strength | ASTM D412 | 1,500 – 4,000 psi |
| Elongation | ASTM D412 | 150 – 700 % |
| Tear Strength | ASTM D624 | 400 – 850 ppi (≈ 80 – 150 kN/m) |
| Compression Set | ASTM D395 | < 25 % typical |
| Heat Aging | ASTM D573 | ≤ 10 % property loss |
| Fluid Immersion | ASTM D471 | < 10 % volume change |
| Temperature Range | — | –75 °F to +500 °F (material-dependent) |
Design Engineering Guidelines
- Compression Ratio: Typically 10 – 30 % depending on hardness and application pressure.
- Stretch / Squeeze: Controlled to avoid over-strain (2 – 5 % typical for static, < 2 % for dynamic).
- Gland Fill: Maintain 70 – 85 % fill for optimum sealing and thermal expansion allowance.
- Pressure Rating: Up to 20,000 psi with proper backup ring support.
- Backup Rings: Recommended for high-pressure or extrusion-prone conditions.
Application Examples
- Oil & Gas: Packers, valve seals, and chemical injection fittings
- Aerospace: Hydraulic, fuel, and pneumatic O-rings certified to MIL-spec performance
- Industrial: Pumps, compressors, couplings, and general sealing systems
- Automotive: Fuel rail, transmission, and brake systems
- Energy & Power: Cable penetration seals, steam system O-rings, turbine enclosures
Advantages of Eutsler O-Ring Technology
- Material-to-Part Control: In-house formulation, molding, post-cure, and inspection
- Field-Proven Compounds: Validated under real service environments
- Precision Dimensional Accuracy: Consistent cross-sections and concentricity
- Scalable Manufacturing: Prototype to full-production flexibility
- ISO 9001:2015 Certified Quality System ensures full traceability and reliability
Performance Envelope
| Capability | Typical Range / Limit |
|---|---|
| Hardness | 30 – 95 Shore A |
| Temperature Range | –75 °F to +500 °F |
| Pressure Capability | Up to 20,000 psi (geometry dependent) |
| Compression Set | < 25 % |
| Tensile Strength | 1,500 – 4,500 psi |
| Tear Strength | 150 – 400 ppi |
| Elongation | 150 – 700 % |
| Dimensional Tolerance | ± 0.005 – 0.020 in (ARPM A1–A3) |
From Concept to Production
- Define– Application environment and performance criteria
- Design– O-ring geometry, compound selection, and groove compatibility
- Develop– Prototype molding and laboratory validation
- Qualify– ASTM testing and field simulation
- Deliver– Certified, traceable O-ring components ready for service
Partner with Eutsler Technical Products
Eutsler delivers precision-engineered O-ring solutions designed from the molecule up.
Our vertically integrated process—from compounding and molding to testing and documentation—ensures every seal meets your exact performance and reliability standards.
Custom Rubber O-Ring Specifications
Many rubber o-rings require bonding the elastomeric compound to metal, especially in the automotive, engineering and construction industries. Eutsler’s experienced staff works with clients to develop the correct combination of natural or synthetic rubber, substrate, bonding agent and metal for each part, ensuring high performance and long life for the custom o-ring.
Parts can be manufactured from ¼ inch to 30 inches, and meet the Rubber Manufacturers Association (RMA) tolerances.
Eutsler’s turnkey services ensure that all irregular-shaped o-rings are manufactured to exact specifications. By working with our clients from design through material selection and manufacturing, we are able to provide a cost-effective, efficient manufacturing process for both short and long-run custom rubber o-ring projects.
Contact Eutsler today for more information or to get your project started!
Materials available include:
- Fluoroelastomers
- Nitriles
- EPDM
- Natural Rubbers
- Silicone
- Acrylates
- SBR
- Urethane
- Specialty Elastomers
Get in Touch with Our Experts Today!
Why Choose Eutsler Technical Products?
R&D
Experienced staff develop high performance and long life parts
Material Selection
Over 300 compounds or custom elastomeric compounds available
Mold Design
Custom molds are designed ensuring tolerances are met
Manufacturing
Molding, extrusion and die cutting services to build your part
Connect with Our Experts
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