{"product_id":"hydraulic-cylinder-seals","title":"High Pressure Hydraulic Cylinder Seals – Piston, Rod \u0026 Wiper Seals","description":"\u003ch3\u003eHigh Pressure Hydraulic Cylinder Seals – Piston, Rod \u0026amp; Wiper Seals\u003c\/h3\u003e\n\u003cp\u003eKaybin manufactures hydraulic cylinder seals including piston seals, rod seals, U-cups, buffer seals and wiper\/scraper seals engineered for high-pressure industrial and mobile hydraulic systems.\u003c\/p\u003e\n\u003cp\u003eThese reciprocating seals are moulded or machined to your groove dimensions, pressure class and duty cycle to control leakage, resist extrusion and extend cylinder service life in mining, press, mobile and OEM equipment across South Africa and Africa.\u003c\/p\u003e\n\u003cp\u003eThis page covers reciprocating hydraulic and pneumatic cylinder seals only — not rotary shaft seals, O-rings or Chevron packing.\u003c\/p\u003e\n\u003ch4\u003eSeal Family Segmentation\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003ePiston Seals\u003c\/strong\u003e\u003cbr\u003eSingle-acting and double-acting piston seals used to separate pressure chambers within hydraulic cylinders.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRod Seals\u003c\/strong\u003e\u003cbr\u003ePrimary dynamic seals installed in the gland to prevent external leakage from the cylinder.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuffer Seals\u003c\/strong\u003e\u003cbr\u003eSecondary pressure-control elements positioned ahead of rod seals to absorb pressure spikes and reduce load on the primary seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eU-Cup Seals\u003c\/strong\u003e\u003cbr\u003eSymmetrical and asymmetrical lip profiles for dynamic sealing in piston or rod applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWiper \/ Scraper Seals\u003c\/strong\u003e\u003cbr\u003eInstalled externally to exclude dust, slurry and water from entering the cylinder and damaging internal components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompact Seals\u003c\/strong\u003e\u003cbr\u003eIntegrated multi-element sealing systems used in higher-pressure hydraulic cylinders where space is limited and performance demands are elevated.\u003c\/p\u003e\n\u003ch4\u003eMaterial Segmentation\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003ePolyurethane (PU)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh wear resistance\u003c\/li\u003e\n\u003cli\u003eStrong extrusion resistance\u003c\/li\u003e\n\u003cli\u003eCommon in mining and heavy-duty hydraulic service\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRubber-Based Compounds\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNBR – mineral oil hydraulic systems\u003c\/li\u003e\n\u003cli\u003eHNBR – elevated temperature and enhanced oil resistance\u003c\/li\u003e\n\u003cli\u003eEPDM – water-based fluids (not compatible with mineral oils)\u003c\/li\u003e\n\u003cli\u003eFKM \/ Viton® – aggressive fluids and higher temperatures\u003c\/li\u003e\n\u003cli\u003eSilicone – wide temperature range applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePTFE \u0026amp; Filled PTFE\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLow friction characteristics\u003c\/li\u003e\n\u003cli\u003eReduced stick-slip behaviour\u003c\/li\u003e\n\u003cli\u003eChemical resistance\u003c\/li\u003e\n\u003cli\u003eOften combined with energisers or back-up rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMaterial hardness (Shore A) and profile geometry are selected based on pressure, temperature, rod speed, contamination level and extrusion gap.\u003c\/p\u003e\n\u003ch4\u003ePerformance \u0026amp; Engineering Considerations\u003c\/h4\u003e\n\u003cp\u003eHydraulic cylinder seals are designed for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-pressure hydraulic circuits\u003c\/li\u003e\n\u003cli\u003eReciprocating motion under load\u003c\/li\u003e\n\u003cli\u003eSide-load and shock loading conditions\u003c\/li\u003e\n\u003cli\u003eMining, mobile and industrial duty environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCritical specification factors include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExtrusion gap control\u003c\/li\u003e\n\u003cli\u003eGroove tolerance and gland design\u003c\/li\u003e\n\u003cli\u003eSurface finish (Ra) compatibility\u003c\/li\u003e\n\u003cli\u003eRod hardness\u003c\/li\u003e\n\u003cli\u003eSeal squeeze and radial interference\u003c\/li\u003e\n\u003cli\u003ePressure spikes and shock loading\u003c\/li\u003e\n\u003cli\u003eDynamic vs static friction behaviour\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCylinder Seal Specification Checklist\u003c\/h4\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ddd;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003eRequired Information\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eBore Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003emm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eRod Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003emm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eGroove Width \u0026amp; Depth\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003emm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eWorking Pressure\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003ebar \/ psi class\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eStroke Length\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003emm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eFluid Type\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eHydraulic oil \/ water-glycol \/ air\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eSurface Finish (Rod\/Bore)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eRa value\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eActing Type\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eSingle or Double Acting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eCommon Failure Modes Addressed\u003c\/h4\u003e\n\u003cp\u003eCorrectly specified hydraulic cylinder seals help prevent:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSeal extrusion into clearance gaps\u003c\/li\u003e\n\u003cli\u003eNibbling and edge damage\u003c\/li\u003e\n\u003cli\u003eSpiral failure\u003c\/li\u003e\n\u003cli\u003eLip rollover\u003c\/li\u003e\n\u003cli\u003eCompression set\u003c\/li\u003e\n\u003cli\u003eRod scoring\u003c\/li\u003e\n\u003cli\u003eInternal bypass leakage\u003c\/li\u003e\n\u003cli\u003eSeal hardening due to thermal exposure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSeal profile, compound selection and gland compatibility are reviewed prior to manufacture to reduce premature failure.\u003c\/p\u003e\n\u003ch4\u003eHydraulic Seal Kits \u0026amp; Replacement Support\u003c\/h4\u003e\n\u003cp\u003eKaybin supplies:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHydraulic cylinder seal kits\u003c\/li\u003e\n\u003cli\u003eRod seal replacement kits\u003c\/li\u003e\n\u003cli\u003ePiston seal replacement kits\u003c\/li\u003e\n\u003cli\u003eCustom seal stacks\u003c\/li\u003e\n\u003cli\u003eReverse-engineered seal kits for discontinued OEM cylinders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCustom hydraulic sealing solutions manufactured to specification for reliable performance in industrial and mobile hydraulic systems across Africa.\u003c\/p\u003e","brand":"kaybin","offers":[{"title":"Default Title","offer_id":45283693265068,"sku":null,"price":0.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/4790\/6476\/files\/kaybin-polyurethane-piston-rod-wiper-seals_webp.webp?v=1770189825","url":"https:\/\/kaybin.co.za\/products\/hydraulic-cylinder-seals","provider":"Kaybin","version":"1.0","type":"link"}