{"product_id":"union-sanitary-seals","title":"Union \u0026 Sanitary Seals","description":"\u003ch4\u003eHygienic Process Pipe \u0026amp; Industrial Union Sealing Solutions\u003c\/h4\u003e\n\u003cp\u003eKaybin manufactures custom union seals and sanitary seals for hygienic and industrial process piping systems where leak-free, repeatable static sealing is critical. Seals are moulded or machined to recognised standards (Tri-Clamp, SMS, RJT, DIN 11851, BSP\/NPT unions) or reverse engineered from  samples to ensure accurate compression and reliable performance in process plants across South Africa and Africa.\u003c\/p\u003e\n\u003cp\u003eThis page covers static hygienic and process union sealing only — not hydraulic cylinder seals (reciprocating motion) and not rotary shaft oil seals.\u003c\/p\u003e\n\u003ch4\u003eFunction \u0026amp; Applications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCompressed static sealing between ferrules and union faces\u003c\/li\u003e\n\u003cli\u003eMaintains hygienic integrity in CIP and SIP systems\u003c\/li\u003e\n\u003cli\u003eSupports dismantlable pipe connections for maintenance and product changeover\u003c\/li\u003e\n\u003cli\u003eCompensates for minor misalignment and thermal cycling\u003c\/li\u003e\n\u003cli\u003eProtects stainless ferrule faces from metal-to-metal damage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCommonly used in:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFood \u0026amp; beverage production lines\u003c\/li\u003e\n\u003cli\u003eDairies and breweries\u003c\/li\u003e\n\u003cli\u003ePharmaceutical and cosmetic plants\u003c\/li\u003e\n\u003cli\u003eChemical processing systems\u003c\/li\u003e\n\u003cli\u003eWater treatment and hygienic utility manifolds\u003c\/li\u003e\n\u003cli\u003eOEM modular skid assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSeal Types Covered\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTri-Clamp \/ hygienic union seals\u003c\/li\u003e\n\u003cli\u003eSMS standard and lip seals\u003c\/li\u003e\n\u003cli\u003eRJT and DIN 11851 union seals\u003c\/li\u003e\n\u003cli\u003eD-rings (standard and heavy-duty profiles)\u003c\/li\u003e\n\u003cli\u003eButterfly valve seals and liners\u003c\/li\u003e\n\u003cli\u003eTank lid and manway gaskets\u003c\/li\u003e\n\u003cli\u003ePTFE envelope sanitary seals\u003c\/li\u003e\n\u003cli\u003eCustom hygienic gasket geometries\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eMaterials\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eElastomer Compounds (Primary)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEPDM – commonly used for hot water, steam and CIP systems\u003c\/li\u003e\n\u003cli\u003eFKM (Viton® type) – chemical and elevated temperature resistance\u003c\/li\u003e\n\u003cli\u003eNBR – general industrial fluids and oils\u003c\/li\u003e\n\u003cli\u003eSilicone (VMQ) – flexibility across wide temperature ranges\u003c\/li\u003e\n\u003cli\u003eNeoprene (CR) – balanced oil and weather resistance\u003c\/li\u003e\n\u003cli\u003eNatural Rubber – resilience-driven compression duties\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThermoplastic Options (Where Required)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePTFE (virgin \u0026amp; filled) – chemical resistance and low permeation; commonly used in envelope-style sanitary seals\u003c\/li\u003e\n\u003cli\u003ePolyurethane (PU) – abrasion-resistant mechanical union duties\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMaterial selection is confirmed based on media compatibility, temperature range, cleaning chemistry, pressure class and regulatory requirements where specified.\u003c\/p\u003e\n\u003ch4\u003eCompression \u0026amp; Clamp Control\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCorrect clamp force ensures stable compression and leak resistance\u003c\/li\u003e\n\u003cli\u003eUnder-compression may cause weeping after thermal cycling\u003c\/li\u003e\n\u003cli\u003eOver-compression can lead to extrusion, compression set and ferrule damage\u003c\/li\u003e\n\u003cli\u003eRepeated assembly may flatten profiles if compound or cross-section is incorrect\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCompound hardness and profile geometry are selected to achieve reliable compression without excessive tightening force (application dependent).\u003c\/p\u003e\n\u003ch4\u003eEPDM vs FKM (Selection Snapshot)\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eEPDM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStrong performance in steam and CIP cycles\u003c\/li\u003e\n\u003cli\u003eNot suitable for mineral oils\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFKM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSuperior chemical resistance\u003c\/li\u003e\n\u003cli\u003eSuitable for higher temperature and solvent exposure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFinal selection depends on cleaning regime, chemical composition and temperature peaks.\u003c\/p\u003e\n\u003ch4\u003eHow to Measure a Union or Sanitary Seal\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eUnion standard (Tri-Clamp, SMS, RJT, DIN 11851, BSP\/NPT)\u003c\/li\u003e\n\u003cli\u003eNominal pipe size (e.g., 1.5\", 2\", DN25, DN40)\u003c\/li\u003e\n\u003cli\u003eSeal ID, OD and cross-section thickness\u003c\/li\u003e\n\u003cli\u003eProcess media and cleaning chemicals\u003c\/li\u003e\n\u003cli\u003eTemperature range and pressure notes\u003c\/li\u003e\n\u003cli\u003eAny regulatory or food-contact requirements\u003c\/li\u003e\n\u003cli\u003eDrawing    or sample \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCommon Failure Modes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSeal extrusion from over-compression\u003c\/li\u003e\n\u003cli\u003eChemical swelling or softening\u003c\/li\u003e\n\u003cli\u003eSteam-induced hardening or cracking\u003c\/li\u003e\n\u003cli\u003eCompression set leading to post-CIP leaks\u003c\/li\u003e\n\u003cli\u003eLeakage after repeated disassembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eReplacement \u0026amp; OEM Support\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eKaybin supports:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReplacement union and sanitary seals\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCustom lip-profile development\u003c\/li\u003e\n\u003cli\u003ePTFE envelope upgrades for chemical duty\u003c\/li\u003e\n\u003cli\u003eCompound upgrades for improved cleaning compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIndustrial hygienic sealing solutions manufactured to specification across South Africa and Africa.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0706\/4790\/6476\/files\/union-sanitary-seal-dimension-chart-tri-clamp-sms-din11851_compressed.pdf\" target=\"_blank\"\u003eView Union \u0026amp; Sanitary Seal Dimension Chart\u003c\/a\u003e\u003c\/p\u003e","brand":"kaybin","offers":[{"title":"Default Title","offer_id":45340249620652,"sku":null,"price":0.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/4790\/6476\/files\/union-sanitary-seals-hygienic-process-gasket-set_webp_e3534b20-68c2-44e1-8e46-8e38634ccf28.webp?v=1775115777","url":"https:\/\/kaybin.co.za\/products\/union-sanitary-seals","provider":"Kaybin","version":"1.0","type":"link"}