Knowledge Centre
Engineering reference for sealing systems.
Technical articles, direct answers to engineering questions, materials data and standards references. Written for engineers, maintenance professionals, OEMs and procurement teams.
Browse by category
- 11 articlesGeneralBroad guides on specifying, buying and managing seals.
- 5 articlesTechnical ArticlesLong-form engineering references.
- 2 articlesEngineering Q&AShort, direct technical answers.
- 7 articlesProduct FocusDeep dives into specific seal profiles.
- 5 articlesMaterialsElastomer and polymer reference pages.
- 1 articleStandardsISO, BS, ASTM and regulatory references.
- 1 articleFailure AnalysisDiagnose common seal failure modes.
- 0 articlesCase StudiesReal engineering projects with Sealparts.
- 10 imagesImagesDiagrams, product photos and failure examples.
Latest additions
- MaterialsNOK O-Ring Materials — JIS Classes, Compound Codes and Test DataTechnical reference to NOK O-ring materials: compound codes (A305, E116, S503, F201, G636, T222), JIS B 2401 material classes, service temperatures, compression set, TR10 and volume-change data for JIS O-rings.12 min · Updated 2026-08-13
- Product FocusNOK Oil Seals — Profiles and Material OptionsTechnical engineering reference to NOK rotary shaft seals: SC, SB, TC, TB, VC, KB, TCJ and HRE profiles, ISO 6194 / JIS / JASO equivalents, lip compound codes (A727, T303, S728, F585), shaft and housing design data, run-out limits and failure diagnosis.16 min · Updated 2026-08-13
- Product FocusSKF Industrial Seals — range, types and replacement guideAn engineer's map of the SKF industrial seals range: power transmission, hydraulic, fluid handling and machined seals, plus materials, design data and how to cross-reference replacements.11 min · Updated 2026-08-13
- Technical ArticlesSakagami Seal Installation InstructionsStep-by-step installation method for Sakagami packings, ST/STK and SMJ seals, rotary joints, SDR/SCK/SCB/SDB wipers, S-LEEVE bearings and KCS/YCS/PCS cushion seals.9 min · Updated 2026-08-13
- MaterialsPiston Ring Coatings — Selection, Thickness and Failure ModesEngineering reference to piston and sealing ring coatings: hard chromium, chrome–ceramic, molybdenum and HVOF carbide sprays, DLC, PTFE films and phosphate conversions — with hardness, temperature limits, dimensional effects and selection by service condition.9 min · Updated 2026-08-12
- Product FocusCast Iron Piston Rings and Rotary Sealing RingsEngineering guide to cast iron piston and rotary sealing rings: ring types, gap joints, materials, groove and bore design, fitting practice and failure diagnosis.8 min · Updated 2026-08-12
Product & brand references
- Sakagami sealsAuthorised UK distributor — GPY, GNY, RGY, SKY, MY and NMY profiles.
- O-ring referenceSize database, elastomer guide and chemical compatibility matrix.
- O-ring tooling8,018 size / material / compound combinations, searchable.
- Japanese o-ringsJIS B 2401 P, G, S, SS and V series with AS568 equivalents.
- TecnolanItalian engineered polyurethane hydraulic seals.
- TecnotexGuarnitec-group fabric-reinforced and composite seals.
- AccofluorDanish PTFE seals and machined components.
- Compound approvalsWRAS, KTW, ACS, NSF 61, DVGW, FDA, USP and 3-A compounds.
- Request a quoteSend sizes or part numbers — quotes in 1–3 working days.
All articles
- NOK O-Ring Materials — JIS Classes, Compound Codes and Test Data
- NOK Oil Seals — Profiles and Material Options
- SKF Industrial Seals — range, types and replacement guide
- Sakagami Seal Installation Instructions
- Piston Ring Coatings — Selection, Thickness and Failure Modes
- Cast Iron Piston Rings and Rotary Sealing Rings
- Japanese Industrial Seals: Finding Replacements for NOK, Sakagami and Machine Tool Seals
- Prototype seals and rapid sealing solutions
- Sealpool: the SKF years, independence in 2002, and the seal range
- O-Ring Material Selection — Temperature, Media and Physical Properties
- O-Ring Storage, Shelf Life and Handling
- O-Ring Size Standards — ISO 3601, JIS B 2401, AS568 and How to Cross Them
- How an O-Ring Actually Seals — Squeeze, Reaction Force and Pressure Energising
- Chamfers, Lead-Ins and O-Ring Installation Damage
- O-Ring Groove Design — Squeeze, Fill, Elongation and Back-Up Rings
- What We Know
- Academic and student research support
- Prototype seals, bearing rings and O-rings
- Sealparts Ltd — based in Coalport, Telford: what we do
- Where to Buy Sakagami Seals in Europe
- Where can I buy Tecnolan seals in the UK and Europe?
- Where can I buy Tecnotex seals in the UK and Europe?
- PTFE Seal Materials — Accofluor Grade Reference
- Before Selecting a Seal, Interrogate the Application
- The O-Ring Always Gets the Blame
- How to Specify and Buy a Seal for a New Application
- Can We Request Performance and Material Tests or a Survey on a Used Sakagami Packing?
- Sakagami Materials — Physical Properties Reference
- Guarnitec, Tecnotex & Tecnolan — Product Summary
- Sakagami Profiles — Complete Summary
- Where Can I Purchase Sakagami Hydraulic and Pneumatic Seals?
- Sakagami NMY — NBR Rod Seals for Small Diameter Hydraulic Cylinders