Engineering Services
Engineering Excellence
From concept to production — custom rubber seal design, compound development and precision manufacturing for the world's most demanding applications.
Get Engineering SupportOur Engineering Capabilities
From material science to precision geometry, Harkesh engineers bring over four decades of rubber product expertise to every project.
Custom Seal Design
CAD-based seal geometry design, groove dimension validation, and FEA-assisted deformation analysis to ensure optimal sealing performance in your application.
Compound Development
Custom rubber compound formulation tailored to specific chemical, thermal, and mechanical requirements — from lab trials through full production qualification.
Prototype & Tooling
Rapid prototype tooling, sample part production within 2–4 weeks, and iterative design optimisation to reach specification before committing to production tooling.
Application Engineering
Application-specific material selection, seal system design review, and failure mode analysis to prevent costly field failures before production.
Quality & Testing
ASTM/ISO test protocols, material qualification testing, and production validation to confirm every batch meets dimensional and performance requirements.
Regulatory Compliance
FDA, RoHS, and REACH compliance review, full documentation packages, and material traceability records for regulated industries.
Our Design Process
A structured, five-step methodology ensures every seal project moves from requirement to production with zero surprises.
Application Review
Gather fluid media, temperature range, pressure, and dynamic or static duty requirements to define the design envelope.
Material Selection
Shortlist elastomers based on chemical compatibility, temperature range, mechanical demands, and total cost of ownership.
Geometry Design
CAD-design seal cross-section and groove dimensions, set compression targets, and validate with FEA deformation analysis.
Prototype & Test
Produce tooled prototype, run ASTM validation tests, review results against spec, and iterate geometry or compound if needed.
Production Release
Finalise compound recipe, release production tooling, and issue control plan with incoming inspection criteria.
Application Review
Gather fluid media, temperature range, pressure, and dynamic or static duty requirements to define the design envelope.
Material Selection
Shortlist elastomers based on chemical compatibility, temperature range, mechanical demands, and total cost of ownership.
Geometry Design
CAD-design seal cross-section and groove dimensions, set compression targets, and validate with FEA deformation analysis.
Prototype & Test
Produce tooled prototype, run ASTM validation tests, review results against spec, and iterate geometry or compound if needed.
Production Release
Finalise compound recipe, release production tooling, and issue control plan with incoming inspection criteria.
Material Capabilities
Harkesh engineers and manufactures seals in seven core elastomer families, covering virtually every industrial, automotive, and high-technology application.
Nitrile
Petroleum oils, fuels, general industrial
Viton®
Aggressive chemicals, high-temperature applications
Ethylene Propylene
Water, steam, acids, brake fluids
Kalrez®
Universal chemical resistance, semiconductor
Silicone
Food, pharmaceutical, low-temperature
Hydrogenated Nitrile
Oil & gas, H₂S environments, high-temperature
Neoprene
Ozone, weathering, refrigerants
Standards & Specifications
Every Harkesh engineering programme is conducted against internationally recognised material, dimensional, and quality management standards.
ASTM
- D412 — Tensile
- D471 — Fluid Immersion
- D573 — Heat Aging
- D395 — Compression Set
- D624 — Tear
- D2240 — Hardness
SAE / AMS
- AMS 7259 — Fluorocarbon
- AMS 7276 — Fluorosilicone
- AMS 7278 — Silicone
ISO
- ISO 3601 — O-Ring Dimensions
- ISO 6072 — Hydraulic Seals
- ISO 9001:2015 — QMS
- ISO 14001:2015 — EMS
Industry
- IATF 16949 — Automotive
- API 6A — Wellhead / Valves
- FDA 21 CFR — Food & Pharma
Engineering Tools & Resources
Interactive online tools to help you shortlist materials, check chemical compatibility, and diagnose seal failures — right from your browser.
Chemical Compatibility Checker
Look up how each of our seven core elastomers holds up against hundreds of industrial chemicals, solvents, and fluids.
Material Comparison Tool
Compare two or more elastomers side-by-side across temperature, hardness, compression set, and key chemical resistances.
Material Selector
Answer a few questions about your media, temperature, and pressure requirements and get an instant elastomer recommendation.
O-Ring Failure Diagnosis
Identify the likely cause of a seal failure from visual symptoms — extrusion, compression set, explosive decompression, and more.
Sectors We Serve
Since 1982, Harkesh has engineered sealing solutions for demanding sectors where failure is not an option.
Automotive
Engine seals, transmission, brake systems
Aerospace
Hydraulic seals, fuel systems, actuation
Oil & Gas
Wellhead, valves, pipeline isolation
Medical
FDA-compliant seals for device & pharma
Industrial
Pumps, compressors, general machinery
Frequently Asked Questions
Common questions about Harkesh's engineering services and technical capabilities.
What engineering support does Harkesh offer?
Harkesh provides end-to-end engineering support including custom seal geometry design (CAD + FEA), rubber compound development, prototype tooling, application engineering, ASTM/ISO testing, and regulatory compliance documentation. Our team works directly with your engineers to solve specific sealing challenges.
Can Harkesh develop custom rubber compounds?
Yes. Our in-house compounding laboratory formulates custom elastomer compounds tailored to your exact chemical, thermal, and mechanical requirements. We run iterative lab trials, characterise physical properties per ASTM standards, and qualify the compound through production validation before release.
How long does prototype development typically take?
For most seal geometries, we can produce prototype tooling and deliver first-article samples within 2–4 weeks from design freeze. Complex geometries or multi-cavity tools may require 4–6 weeks. We share a detailed programme schedule at the start of each project.
What standards does Harkesh design to?
We routinely work to ASTM D-series material standards (D412, D471, D573, D395, D624, D2240), SAE AMS specifications, ISO 3601 for O-ring dimensions, API 6A for oil & gas, IATF 16949 for automotive, and FDA 21 CFR for food and pharmaceutical contact applications.
Does Harkesh provide material selection consulting?
Absolutely. Material selection consulting is a core part of our Application Engineering service. Share your fluid media, temperature range, pressure, and dynamic or static duty cycle, and our engineers will recommend the optimal elastomer and seal system — often backed by compatibility data and historical application experience.
Talk to Our Engineering Team
Submit your application details and our engineers will recommend the optimal material and seal design — typically within one business day.