{"product_id":"plunger-blocks","title":"Plastic Plunger Blocks \u0026 Dosing Pistons","description":"\u003ch3\u003ePlastic Plunger Blocks \u0026amp; Dosing Pistons for Filling, Metering \u0026amp; Pump Systems\u003c\/h3\u003e\n\u003cp\u003eKaybin manufactures custom plastic plunger blocks and plastic dosing pistons for filling machines, metering pumps, volumetric cylinders and packaging systems where controlled displacement, dimensional stability and chemical resistance are critical. Components are precision-machined to drawing, CAD file or sample for OEM production and industrial replacement applications across South Africa and Africa.\u003c\/p\u003e\n\u003cp\u003eThis page covers industrial plastic plunger blocks, reciprocating pistons and dosing piston assemblies only — not rubber plungers, medical syringe components or consumer hardware.\u003c\/p\u003e\n\u003ch4\u003eApplications \u0026amp; Equipment Coverage\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003ePlastic plunger blocks and pistons are commonly used in:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLiquid filling machines\u003c\/li\u003e\n\u003cli\u003eVolumetric dosing and batching systems\u003c\/li\u003e\n\u003cli\u003eChemical metering pumps\u003c\/li\u003e\n\u003cli\u003eBottling and capping lines\u003c\/li\u003e\n\u003cli\u003eSyrup and viscous product fillers\u003c\/li\u003e\n\u003cli\u003eTransfer and dispensing skids\u003c\/li\u003e\n\u003cli\u003eCustom OEM packaging machinery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePrimary functional roles include:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDisplacing a fixed volume per stroke\u003c\/li\u003e\n\u003cli\u003eMaintaining concentric reciprocating movement inside a dosing cylinder\u003c\/li\u003e\n\u003cli\u003eSupporting dynamic seals (O-rings, U-seals, cup seals)\u003c\/li\u003e\n\u003cli\u003eProviding a low-friction sliding surface against bore or liner\u003c\/li\u003e\n\u003cli\u003eMaintaining stroke repeatability and dosing accuracy\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePiston vs Plunger – Industrial Context\u003c\/h4\u003e\n\u003cp\u003eIn filling and dosing systems, the terms \"plunger\" and \"piston\" are often used interchangeably. A plunger block may refer to the machined drive component mounted to an actuator rod, while a piston typically refers to the displacement element operating inside the cylinder bore. Many OEM systems combine both functions into a single plastic piston assembly. Kaybin manufactures both plunger-style blocks and precision plastic dosing pistons.\u003c\/p\u003e\n\u003ch4\u003eMaterial Options \u0026amp; Engineering Behaviour\u003c\/h4\u003e\n\u003cp\u003eMaterials are selected based on media compatibility, dimensional stability, pressure conditions and seal interface requirements.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePTFE (Virgin \u0026amp; Filled Grades)\u003c\/strong\u003e\u003cbr\u003eVery low friction and high chemical resistance. Filled grades improve wear resistance and reduce creep compared to virgin PTFE.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcetal \/ POM (Delrin-type)\u003c\/strong\u003e\u003cbr\u003eExcellent dimensional stability and low moisture absorption. Suitable for tight-tolerance volumetric pistons and consistent dosing accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNylon (PA6 \/ PA66 \/ Filled Grades)\u003c\/strong\u003e\u003cbr\u003eTough and impact-resistant for mechanical piston drives. Moisture absorption considered in clearance design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUHMWPE\u003c\/strong\u003e\u003cbr\u003eLow friction and abrasion resistance for lower-pressure reciprocating applications.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"kaybin","offers":[{"title":"Default Title","offer_id":45264032268460,"sku":null,"price":0.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/4790\/6476\/files\/kaybin-plastic-plunger-blocks-filling-line-components-south-africa_webp.webp?v=1769075748","url":"https:\/\/kaybin.co.za\/products\/plunger-blocks","provider":"Kaybin","version":"1.0","type":"link"}