[{"data":1,"prerenderedAt":500},["ShallowReactive",2],{"catalog:meta":3,"catalog:part:mc-sb-08":258,"diagram:part:mc-sb-08":346,"guides:links:parts:MC-SB-08":479,"blog:related:3:cylinder seal,hydraulic cylinder seals & y-ring,seal kit,seals & bearings,y-ring":487},{"categories":4,"machines":132,"zones":212,"totals":255},[5,35,59,122],{"id":6,"name":7,"slug":8,"description":9,"partCount":10,"subcategories":11},"EC","Electrical Components","electrical","Electrical systems and components for injection molding machines including heaters, thermocouples, servo motors, and controllers.",11,[12,17,22,27,31],{"id":13,"name":14,"slug":15,"partCount":16},"EC-CBC","Circuit Boards & Controllers","circuit-boards",4,{"id":18,"name":19,"slug":20,"partCount":21},"EC-CE","Connectors & Cables","connectors-cables",2,{"id":23,"name":24,"slug":25,"partCount":26},"EC-GEP","Servo Motors & Drives","servo-motors",1,{"id":28,"name":29,"slug":30,"partCount":21},"EC-HT","Heaters","heaters",{"id":32,"name":33,"slug":34,"partCount":21},"EC-SF","Safety Components","safety",{"id":36,"name":37,"slug":38,"description":39,"partCount":40,"subcategories":41},"HY","Hydraulic Components","hydraulic","Complete range of hydraulic system components including pumps, valves, motors, and pressure controls for injection molding machines.",14,[42,46,51,55],{"id":43,"name":44,"slug":45,"partCount":26},"HY-AU","Accumulators","accumulators",{"id":47,"name":48,"slug":49,"partCount":50},"HY-CV","Control Valves","control-valves",6,{"id":52,"name":53,"slug":54,"partCount":26},"HY-MO","Monitors & Gauges","monitors-gauges",{"id":56,"name":57,"slug":58,"partCount":50},"HY-PW","Pumps & Motors","pumps-motors",{"id":60,"name":61,"slug":62,"description":63,"partCount":64,"subcategories":65},"MC","Mechanical Components","mechanical","Mechanical parts and assemblies including barrels, screws, tie bars, bushings, platens, and clamping components.",42,[66,71,75,80,85,89,93,97,101,105,109,114,118],{"id":67,"name":68,"slug":69,"partCount":70},"MC-BC","Barrels & Cylinders","barrels-cylinders",5,{"id":72,"name":73,"slug":74,"partCount":16},"MC-SB","Screw Barrels & Seals","screws",{"id":76,"name":77,"slug":78,"partCount":79},"MC-TC","Tie Bars & Columns","tie-bars",7,{"id":81,"name":82,"slug":83,"partCount":84},"MC-GZ","Bushings & Guides","bushings-guides",8,{"id":86,"name":87,"slug":88,"partCount":26},"MC-PP","Platens","platens",{"id":90,"name":91,"slug":92,"partCount":70},"MC-TL","Toggle & Links","toggle-links",{"id":94,"name":95,"slug":96,"partCount":21},"MC-CC","Clamping Components","clamping",{"id":98,"name":99,"slug":100,"partCount":21},"MC-GMP","Tools & Accessories","tools-accessories",{"id":102,"name":103,"slug":104,"partCount":21},"MC-ES","End Caps & Plates","end-caps",{"id":106,"name":107,"slug":108,"partCount":26},"MC-SR","Seals & Rings","seals-rings",{"id":110,"name":111,"slug":112,"partCount":113},"MC-JM","Joints & Mounts","joints-mounts",3,{"id":115,"name":116,"slug":117,"partCount":26},"MC-SG","Safety Guards","safety-guards",{"id":119,"name":120,"slug":121,"partCount":26},"MC-CR","Clamping Mechanism","clamping-mechanism",{"id":123,"name":124,"slug":125,"description":126,"partCount":113,"subcategories":127},"O","Other Components","other","Additional components including filters, cooling systems, lubrication parts, and other auxiliary equipment.",[128],{"id":129,"name":130,"slug":131,"partCount":113},"O-TC","Filters & Cooling","filters-cooling",[133,143,161,172,180,188,194,200,205],{"id":134,"name":135,"slug":134,"series":136,"partCount":142},"haitian","Haitian International",[137,138,139,140,141],"Mars Series (MA)","Jupiter Series (JU)","Zhafir Venus Series (VE)","Zhafir Zeres Series (ZE)","Zhafir Jeres Series (JE)",68,{"id":144,"name":145,"slug":144,"series":146,"partCount":160},"yizumi","Yizumi",[147,148,149,150,151,152,153,154,155,156,157,158,159],"A6 Series","A5-EU Series","A5-N Series","SKIII Series","DP Series","D1 Series","FF Series","FF-M Series","P Series","CG-P Series","VM Series","SPET Series","LSR Series",12,{"id":162,"name":163,"slug":162,"series":164,"partCount":171},"chen-hsong","Chen Hsong",[165,166,167,168,169,170],"JETMASTER MK Series","JETMASTER SVP Series","SUPERMASTER Series","EASYMASTER Series","SPARK Series","JETMASTER C2 Series",10,{"id":173,"name":174,"slug":173,"series":175,"partCount":179},"tederic","Tederic",[176,177,178],"NEO Series","D Series (Two-Platen)","DE Series (All-Electric)",0,{"id":181,"name":182,"slug":181,"series":183,"partCount":179},"borch","Borch",[184,185,186,187],"BU Series (Two-Platen)","BS-III Series (Servo)","BE Series (All-Electric)","BM Series (Multi-color)",{"id":189,"name":190,"slug":189,"series":191,"partCount":179},"log-machine","LOG Machine",[192,193],"LOG-SE Series","LOG-EE Series (All-Electric)",{"id":195,"name":196,"slug":195,"series":197,"partCount":179},"donghua","Donghua",[198,199],"DH Series (Servo)","DH-TP Series (Two-Platen)",{"id":201,"name":202,"slug":201,"series":203,"partCount":179},"sunbun","Sunbun",[204],"Sunbun Servo Series",{"id":206,"name":207,"slug":206,"series":208,"partCount":179},"lijin","L.K. Machinery (Lijin)",[209,210,211],"POTENZA Series","FORZA Series (Two-Platen)","ELETTRICA Series (All-Electric)",[213,217,221,225,228,231,235,238,242,248,251],{"id":214,"number":26,"name":215,"role":216,"partCount":21},"clamp-cylinder","Clamping cylinder","The hydraulic cylinder behind the rear platen. It drives the crosshead that straightens the toggle links, which opens and closes the mold and builds the clamping force.",{"id":218,"number":21,"name":219,"role":220,"partCount":50},"toggle","Toggle mechanism","Links, pins and bushings between the rear and moving platens. They multiply the force of the clamping cylinder and lock the mold shut while plastic is injected.",{"id":222,"number":113,"name":223,"role":224,"partCount":113},"ejector","Ejector","A small cylinder behind the moving platen that pushes the ejector rods and plate forward to release the finished part from the mold.",{"id":78,"number":16,"name":226,"role":227,"partCount":40},"Tie bars & bushings","Four steel columns that join the platens, guide the moving platen and carry the clamping force. Tie bar nuts lock them in place; bushings guide the moving platen along them.",{"id":88,"number":70,"name":229,"role":230,"partCount":21},"Platens & mold plates","The fixed and moving platens carry the two halves of the mold; the rear platen anchors the toggle. Locating rings and clamping plates center and hold the mold.",{"id":232,"number":50,"name":233,"role":234,"partCount":50},"barrel-screw","Barrel, screw & nozzle","The screw turns inside the heated barrel to melt and mix the plastic, then moves forward to inject it through the nozzle into the mold. The screw tip and check ring stop melt from flowing back.",{"id":30,"number":79,"name":236,"role":237,"partCount":113},"Heater bands & sensors","Heater bands around the barrel and nozzle melt the plastic. Thermocouples measure each heating zone so the controller can hold the set temperature.",{"id":239,"number":84,"name":240,"role":241,"partCount":79},"injection-unit","Injection unit","Injection cylinders push the screw forward, the hydraulic (plasticizing) motor turns it, and the carriage moves the unit against the mold on its guide rails.",{"id":243,"number":244,"name":245,"role":246,"partCount":247},"hydraulics",9,"Hydraulic unit","The pump, motor, valves, accumulator, filters and oil cooler in the machine base. They supply and control the oil pressure for every movement of the machine.",16,{"id":8,"number":171,"name":249,"role":250,"partCount":244},"Electrical cabinet","The controller, I\u002FO and drive boards, servo drives, contactors and safety switches that run and protect the machine.",{"id":252,"number":10,"name":253,"role":254,"partCount":21},"feet","Machine feet","Leveling bolts and anti-vibration pads under the machine base that keep the machine level and stop vibration spreading to the floor.",{"parts":256,"subcategories":257},70,23,{"part":259,"category":302,"zone":317,"related":318},{"partNumber":260,"name":261,"slug":262,"category":60,"subcategory":72,"categoryName":61,"subcategoryName":263,"machineZone":239,"shortDescription":264,"description":265,"specifications":266,"variants":276,"compatibleMachines":285,"images":290,"tags":291,"relatedParts":296,"inStock":300,"featured":301},"MC-SB-08","Hydraulic Cylinder Seals & Y-Ring","hydraulic-cylinder-seals-y-ring","Seals & Bearings","Hydraulic cylinder seal kits and Y-ring piston rod seals for injection molding machine cylinders.","Complete hydraulic cylinder seal kits and Y-type piston rod seals for injection molding machine clamping and injection cylinders. Includes piston seals, rod seals, guide rings, and wiper seals. Available for all major cylinder sizes.",[267,270,273],{"name":268,"value":269},"Material","Polyurethane \u002F NBR \u002F PTFE",{"name":271,"value":272},"Temperature Range","-30°C to +100°C",{"name":274,"value":275},"Pressure Rating","Up to 35 MPa",[277,281],{"sku":278,"type":279,"description":280},"MC-SB-08-KIT","Complete Seal Kit","Full cylinder seal set",{"sku":282,"type":283,"description":284},"MC-SB-08-Y","Y-Type Rod Seal","Single Y-ring for piston rod",[286,287,288,289],"Haitian MA Series","Haitian MA II Series","Yizumi A5 Series","Chen Hsong JM Series",[],[292,293,294,295],"seal kit","Y-ring","cylinder seal","piston seal",[297,298,299],"MC-CC-01","MC-BC-06","MC-SB-10",true,false,{"id":60,"name":61,"slug":62,"description":63,"partCount":64,"subcategories":303},[304,305,306,307,308,309,310,311,312,313,314,315,316],{"id":67,"name":68,"slug":69,"partCount":70},{"id":72,"name":73,"slug":74,"partCount":16},{"id":76,"name":77,"slug":78,"partCount":79},{"id":81,"name":82,"slug":83,"partCount":84},{"id":86,"name":87,"slug":88,"partCount":26},{"id":90,"name":91,"slug":92,"partCount":70},{"id":94,"name":95,"slug":96,"partCount":21},{"id":98,"name":99,"slug":100,"partCount":21},{"id":102,"name":103,"slug":104,"partCount":21},{"id":106,"name":107,"slug":108,"partCount":26},{"id":110,"name":111,"slug":112,"partCount":113},{"id":115,"name":116,"slug":117,"partCount":26},{"id":119,"name":120,"slug":121,"partCount":26},{"id":239,"number":84,"name":240,"role":241},[319,326,331,339],{"partNumber":297,"name":320,"subcategory":94,"subcategoryName":321,"shortDescription":322,"image":323,"inStock":300,"zone":214,"compatibleMachines":324},"Clamping Cylinder","Clamping Cylinders","Main clamping (mold locking) hydraulic cylinder for injection molding machine clamping unit.","\u002Fpart-images\u002FMC\u002FMC-CC-01\u002F9128932b-7cfa-435e-bb52-324ef33e782f.png",[286,325,289],"Haitian Jupiter Series",{"partNumber":298,"name":327,"subcategory":67,"subcategoryName":68,"shortDescription":328,"image":329,"inStock":300,"zone":239,"compatibleMachines":330},"Injection Cylinder","Injection hydraulic cylinder for injection molding machine injection unit.","\u002Fpart-images\u002FMC\u002FMC-BC-06\u002F90T.jpg",[286,287],{"partNumber":299,"name":332,"subcategory":72,"subcategoryName":333,"shortDescription":334,"inStock":300,"zone":239,"compatibleMachines":335},"Piston Rod Nut","Cylinders & Seals","Injection cylinder piston rod nut for Haitian and equivalent injection molding machines.",[286,287,336,337,338],"Haitian MA III Series","Haitian PL Series","Haitian HTF Series",{"partNumber":340,"name":341,"subcategory":72,"subcategoryName":263,"shortDescription":342,"image":343,"inStock":300,"zone":232,"compatibleMachines":344},"MC-SB-01","Screw Barrel Assembly","Complete screw and barrel assembly for injection molding machine plasticizing unit.","\u002Fpart-images\u002FMC\u002FMC-BC-01\u002FMC-SB-01\u002F8a8d3cba-2faf-4123-8b59-514390486726.png",[286,345,287],"Haitian MA1600",{"diagram":347,"items":478},{"title":348,"description":349,"items":350},"Seals of a hydraulic cylinder","Section through a hydraulic cylinder showing the piston seals, piston rod nut, piston rod and rod seal set, with a screw barrel assembly below, numbered.",[351,368,383,397,414,429,447],{"id":352,"name":353,"role":354,"subcategory":94,"marker":355,"shapes":359},"cylinder","Cylinder tube and end caps","The honed tube and the end caps hold the oil. Oil pumped into one end or the other moves the piston.",[356,357,356,358],100,24,66,{"solid":360},[361,362,363,364,365,366,367],"M39 56h22a3 3 0 0 1 3 3v162a3 3 0 0 1 -3 3h-22a3 3 0 0 1 -3 -3v-162a3 3 0 0 1 3 -3z","M64 66h352v14h-352z","M64 200h352v14h-352z","M419 56h46a3 3 0 0 1 3 3v53a3 3 0 0 1 -3 3h-46a3 3 0 0 1 -3 -3v-53a3 3 0 0 1 3 -3z","M419 165h46a3 3 0 0 1 3 3v53a3 3 0 0 1 -3 3h-46a3 3 0 0 1 -3 -3v-53a3 3 0 0 1 3 -3z","M44 44h14v12h-14z","M392 54h14v12h-14z",{"id":369,"name":370,"role":371,"parts":372,"marker":373,"shapes":377},"rod-nut","Piston rod nut","Holds the piston on the threaded end of the rod. It must stay tight: a loose nut lets the piston knock and damages the seals.",[299],[374,357,375,376],150,176,117,{"solid":378,"line":380},[379],"M172 117h22a2 2 0 0 1 2 2v42a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-42a2 2 0 0 1 2 -2z",[381,382],"M170 129L196 129","M170 151L196 151",{"id":384,"name":385,"role":386,"marker":387,"shapes":391},"piston","Piston","Separates the two oil chambers of the cylinder. Pressure on one side pushes it, and the rod with it.",[388,357,389,390],198,200,96,{"solid":392,"hidden":394},[393],"M199 82h60a3 3 0 0 1 3 3v110a3 3 0 0 1 -3 3h-60a3 3 0 0 1 -3 -3v-110a3 3 0 0 1 3 -3z",[395,396],"M196 124L262 124","M196 156L262 156",{"id":398,"name":399,"role":400,"parts":401,"marker":402,"shapes":406},"piston-seals","Piston seals","Y-rings and wear rings in the piston grooves. They keep oil from passing the piston; worn piston seals make the cylinder creep and lose force.",[260],[403,357,404,405],246,249,80,{"solid":407},[408,409,410,411,412,413],"M202 80L216 80L216 90L211.8 90L209 85L206.2 90L202 90Z","M242 80L256 80L256 90L251.8 90L249 85L246.2 90L242 90Z","M202 200L216 200L216 190L211.8 190L209 195L206.2 190L202 190Z","M242 200L256 200L256 190L251.8 190L249 195L246.2 190L242 190Z","M222 80h14v6h-14z","M222 194h14v6h-14z",{"id":415,"name":416,"role":417,"parts":418,"marker":420,"shapes":423},"piston-rod","Piston rod","Chrome-plated rod that carries the force out of the cylinder. Scratches or pitting on its surface quickly destroy the rod seals.",[419],"MC-GZ-01",[421,357,421,422],330,115,{"solid":424,"line":427},[425,426],"M262 115h276v50h-276z","M546 108h18a8 8 0 0 1 8 8v48a8 8 0 0 1 -8 8h-18a8 8 0 0 1 -8 -8v-48a8 8 0 0 1 8 -8z",[428],"M544 140a11 11 0 1 0 22 0a11 11 0 1 0 -22 0z",{"id":430,"name":431,"role":432,"parts":433,"marker":435,"shapes":439},"rod-seals","Rod seal set","Guide ring, rod seal and wiper in the front head. The seal holds the oil in, the wiper keeps dirt out and the guide ring keeps the rod centred.",[434],"MC-SB-07",[436,357,437,438],492,472,112,{"solid":440},[441,442,443,444,445,446],"M422 110h14v5h-14z","M422 165h14v5h-14z","M442 106L454 106L454 115L450.4 115L448 110.5L445.6 115L442 115Z","M442 174L454 174L454 165L450.4 165L448 169.5L445.6 165L442 165Z","M458 107L468 107L468 110L473 115L458 115Z","M458 173L468 173L468 170L473 165L458 165Z",{"id":448,"name":449,"role":450,"parts":451,"marker":452,"shapes":456},"screw-barrel","Screw barrel assembly","The barrel and screw supplied together as a matched set, with the screw head, ready to fit to the injection unit.",[340],[453,454,453,455],420,336,292,{"solid":457,"hidden":462},[458,459,460,461],"M148 276L162 271L176 271L176 287L162 287L148 282Z","M178 262h6a2 2 0 0 1 2 2v30a2 2 0 0 1 -2 2h-6a2 2 0 0 1 -2 -2v-30a2 2 0 0 1 2 -2z","M186 266h280v26h-280z","M468 272h32a2 2 0 0 1 2 2v10a2 2 0 0 1 -2 2h-32a2 2 0 0 1 -2 -2v-10a2 2 0 0 1 2 -2z",[463,464,465,466,467,468,469,470,471,472,473,474,475,476,477],"M190 279L462 279","M196 269L202 289","M215 269L221 289","M234 269L240 289","M253 269L259 289","M272 269L278 289","M291 269L297 289","M310 269L316 289","M329 269L335 289","M348 269L354 289","M367 269L373 289","M386 269L392 289","M405 269L411 289","M424 269L430 289","M443 269L449 289",[398],[480,483],{"to":481,"label":399,"description":482},"\u002Finjection-molding-machine-parts\u002Fclamp-cylinder\u002Fpiston-seals\u002F","What the piston seals of an injection molding machine cylinder do, Y-ring and compact seal types, wear rings, signs of bypass leakage, testing and replacement.",{"to":484,"label":485,"description":486},"\u002Finjection-molding-machine-parts\u002Fclamp-cylinder\u002Fcylinder-seal-replacement\u002F","Replacing cylinder seals","Step-by-step seal kit replacement for an injection molding machine hydraulic cylinder: safety, dismantling, inspection, fitting new seals and testing.",[488],{"title":489,"path":490,"description":491,"date":492,"category":493,"tags":494},"Troubleshooting Hydraulic Pressure Loss in Injection Molding Machines","\u002Fblog\u002Ftroubleshooting-hydraulic-pressure-loss","Diagnose and fix hydraulic pressure loss problems in injection molding machines. Common causes, step-by-step troubleshooting, and replacement parts guide.","2026-09-30","Troubleshooting",[38,495,496,497,498,499],"pressure loss","troubleshooting","vane pump","piston pump","control valve",1793548981999]