[{"data":1,"prerenderedAt":821},["ShallowReactive",2],{"catalog:meta":3,"guides:page:\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fhydraulic-check-valve:*":258,"guides:topics:hydraulics:\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fhydraulic-check-valve:path,title,short":573,"guides:page:\u002Finjection-molding-machine-parts\u002Fhydraulics:diagram":662,"diagram:id:valve-manifold":664,"catalog:parts::HY-CV-05":814},{"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,{"id":259,"title":260,"body":261,"description":546,"diagram":547,"extension":548,"faq":549,"item":562,"lastModified":563,"meta":564,"navigation":565,"order":160,"parts":566,"path":568,"seo":569,"seoTitle":570,"short":305,"stem":571,"__hash__":572},"guides\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fhydraulic-check-valve.md","Hydraulic check valve of an injection molding machine",{"type":262,"value":263,"toc":535},"minimark",[264,283,288,291,363,367,379,382,386,414,417,421,458,462,482,486,489,493,519,523],[265,266,267,268,272,273,276,277,282],"p",{},"A hydraulic check valve lets oil flow one way only. Oil flowing in the free direction pushes a spring-loaded poppet or ball off its seat; pressure from the other side presses it back onto the seat and blocks the flow. On an injection molding machine it sits in the ",[269,270,271],"strong",{},"hydraulic oil circuit",", for example at the pump outlet or in the accumulator line. It is ",[269,274,275],{},"not"," the check ring on the screw tip, which stops plastic melt from flowing back during injection; that part is covered on the ",[278,279,281],"a",{"href":280},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fcheck-ring\u002F","check ring page",". On the drawing, the check valve is in the pressure line from the pump, under the manifold block.",[284,285,287],"h2",{"id":286},"hydraulic-check-valve-or-screw-check-ring","Hydraulic check valve or screw check ring?",[265,289,290],{},"Both are called check valves or non-return valves, which causes confusion when ordering:",[292,293,294,309],"table",{},[295,296,297],"thead",{},[298,299,300,303,306],"tr",{},[301,302],"th",{},[301,304,305],{},"Hydraulic check valve",[301,307,308],{},"Screw check ring",[310,311,312,324,335,346],"tbody",{},[298,313,314,318,321],{},[315,316,317],"td",{},"Where it sits",[315,319,320],{},"In the oil circuit: pump outlet, accumulator line, valve manifold",[315,322,323],{},"On the front of the screw, around the screw tip",[298,325,326,329,332],{},[315,327,328],{},"What it stops",[315,330,331],{},"Hydraulic oil flowing back",[315,333,334],{},"Plastic melt flowing back over the screw flights",[298,336,337,340,343],{},[315,338,339],{},"Typical symptoms when worn",[315,341,342],{},"Drifting cylinders, accumulator losing charge, oil running back through the pump",[315,344,345],{},"Unstable cushion, screw creeping forward in hold, short shots",[298,347,348,351,357],{},[315,349,350],{},"Zone guide",[315,352,353],{},[278,354,356],{"href":355},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002F","Hydraulic system",[315,358,359],{},[278,360,362],{"href":361},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002F","Barrel and screw",[284,364,366],{"id":365},"how-a-hydraulic-check-valve-works","How a hydraulic check valve works",[265,368,369,370,373,374,378],{},"The valve has a seat, a poppet or ball, and a spring. In the free direction, the oil pressure lifts the poppet once it exceeds the spring force; this opening pressure is the ",[269,371,372],{},"cracking pressure",". The ",[278,375,377],{"href":376},"\u002Fparts\u002Fhy-cv-05\u002F","check valve"," we supply has a listed cracking pressure of 0.3–0.5 MPa and is rated to 31.5 MPa. In the reverse direction, the pressure adds to the spring force and holds the poppet tighter on its seat, so a poppet check valve seals with very little leakage.",[265,380,381],{},"Some check valves have a deliberately stiff spring, so they hold a minimum pressure upstream, for example to keep pilot pressure available in a circuit.",[284,383,385],{"id":384},"types-of-hydraulic-check-valve","Types of hydraulic check valve",[387,388,389,396,402,408],"ul",{},[390,391,392,395],"li",{},[269,393,394],{},"Inline check valves"," with threaded ends, fitted in a pipe or hose line.",[390,397,398,401],{},[269,399,400],{},"Cartridge check valves"," that screw or slip into a bore in a manifold block.",[390,403,404,407],{},[269,405,406],{},"Plate-mounted and stacking (sandwich) check valves",", mounted under a directional valve.",[390,409,410,413],{},[269,411,412],{},"Pilot-operated check valves",", which also open in the reverse direction when pressure is applied to a pilot port. They hold a cylinder in position, because a spool valve always leaks a little. A double version on both lines of a cylinder is called a hydraulic lock.",[265,415,416],{},"Our check valve is available in cartridge and inline versions.",[284,418,420],{"id":419},"where-check-valves-are-used-on-an-injection-molding-machine","Where check valves are used on an injection molding machine",[387,422,423,429,440,446,452],{},[390,424,425,428],{},[269,426,427],{},"At the pump outlet",", to stop oil running back through the pump when it stops, and to keep the flows of two pumps or two pump sections apart.",[390,430,431,434,435,439],{},[269,432,433],{},"In the accumulator line",", so the pump can charge the ",[278,436,438],{"href":437},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Faccumulator\u002F","accumulator"," but the accumulator cannot discharge back to the pump.",[390,441,442,445],{},[269,443,444],{},"As a bypass"," around a filter or the oil cooler, opening when the element is blocked or the oil is cold and thick.",[390,447,448,451],{},[269,449,450],{},"In holding circuits",", as pilot-operated check valves on cylinders that must not drift.",[390,453,454,457],{},[269,455,456],{},"As large prefill valves"," on some direct hydraulic clamps, which let oil from the tank fill the clamp cylinder during fast mold closing.",[284,459,461],{"id":460},"signs-of-a-faulty-check-valve","Signs of a faulty check valve",[387,463,464,467,470,473,476,479],{},[390,465,466],{},"A cylinder drifts or does not hold its position.",[390,468,469],{},"The accumulator loses its charge while the machine is idle.",[390,471,472],{},"Oil runs back through the pump when it stops, and the lines partly empty.",[390,474,475],{},"The flow of one pump feeds back into another circuit.",[390,477,478],{},"Chattering or hammering noise from the valve.",[390,480,481],{},"No flow at all in the free direction: the valve is stuck closed or fitted the wrong way round.",[284,483,485],{"id":484},"why-check-valves-fail","Why check valves fail",[265,487,488],{},"Dirt particles that hold the poppet off its seat are the most common cause. Wear or erosion of the seat, a weak or broken spring, damaged O-rings on cartridge versions, and a valve fitted backwards after a repair are the others.",[284,490,492],{"id":491},"testing-and-replacing-a-check-valve","Testing and replacing a check valve",[494,495,496,499,502,505,508,511],"ol",{},[390,497,498],{},"Find the valve on the hydraulic circuit diagram, and note its free flow direction there and on the arrow on the valve body.",[390,500,501],{},"Lock out the machine and relieve the pressure, including the accumulator through its safety block.",[390,503,504],{},"Remove the valve and inspect the seat, poppet and spring. Clean away any dirt and look for scoring on the sealing faces.",[390,506,507],{},"A valve can be checked on a test bench: pressure applied on the outlet side should hold without leaking past the seat.",[390,509,510],{},"Fit the new or cleaned valve with the arrow pointing in the free flow direction, with new seals, and tighten it to the torque in the machine manual.",[390,512,513,514,518],{},"If dirt caused the leak, change the filters as well; see the ",[278,515,517],{"href":516},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Foil-filter\u002F","oil filter",".",[284,520,522],{"id":521},"what-to-send-for-a-replacement-quote","What to send for a replacement quote",[265,524,525,526,530,531,518],{},"The type (inline, cartridge, plate-mounted or pilot-operated), the thread or cavity size, the cracking pressure if it is marked, the model code, its position on the circuit diagram, and photos. Add the machine model and serial number, then ",[278,527,529],{"href":528},"\u002Frequest-quote\u002F","request a quote",". For the valve block it sits in, see the ",[278,532,534],{"href":533},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fvalve-manifold\u002F","valve manifold",{"title":536,"searchDepth":21,"depth":21,"links":537},"",[538,539,540,541,542,543,544,545],{"id":286,"depth":21,"text":287},{"id":365,"depth":21,"text":366},{"id":384,"depth":21,"text":385},{"id":419,"depth":21,"text":420},{"id":460,"depth":21,"text":461},{"id":484,"depth":21,"text":485},{"id":491,"depth":21,"text":492},{"id":521,"depth":21,"text":522},"How the hydraulic check valve in the oil circuit of an injection molding machine works (not the screw check ring): types, where it is used, faults and replacement.","valve-manifold","md",[550,553,556,559],{"question":551,"answer":552},"Is a hydraulic check valve the same as the check ring on the screw?","No. The hydraulic check valve sits in the oil circuit and stops hydraulic oil from flowing back, while the check ring on the screw tip is a non-return valve for the plastic melt. They are different parts, wear for different reasons and are replaced separately.",{"question":554,"answer":555},"What is cracking pressure?","The pressure difference needed to lift the poppet or ball of a check valve off its seat against its spring and start the flow. It is set by the spring and given in the valve data.",{"question":557,"answer":558},"What is a pilot-operated check valve used for?","It blocks reverse flow like a normal check valve, but opens when pressure is applied to its pilot port. It is used to hold a cylinder in position, because a spool valve on its own always leaks a little.",{"question":560,"answer":561},"What happens when a hydraulic check valve leaks?","Depending on where it sits, a cylinder drifts, the accumulator loses its charge while the machine waits, or oil runs back through the pump when it stops. Dirt on the seat is the most common cause.","check","2026-11-01",{},true,[567],"HY-CV-05","\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fhydraulic-check-valve",{"title":260,"description":546},"Hydraulic Check Valve in Injection Molding Machines","injection-molding-machine-parts\u002Fhydraulics\u002Fhydraulic-check-valve","Xd6Rz0X9rJeCCb6kwq6cBDRzOhrJ3DDlHCLc7B2DOU4",[574,578,582,586,590,594,598,602,606,610,614,618,622,626,630,634,638,642,646,650,654,658],{"path":575,"title":576,"short":577},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fhydraulic-circuit","Hydraulic circuit of an injection molding machine","Hydraulic circuit",{"path":579,"title":580,"short":581},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fhydraulic-pump","Hydraulic pump of an injection molding machine","Hydraulic pump types",{"path":583,"title":584,"short":585},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fvane-pump","Vane pump of an injection molding 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manifold",{"path":627,"title":628,"short":629},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Faccumulator","Accumulator of an injection molding machine","Accumulator",{"path":631,"title":632,"short":633},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fhydraulic-oil","Hydraulic oil for injection molding machines","Hydraulic oil",{"path":635,"title":636,"short":637},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Foil-temperature","Oil temperature of an injection molding machine","Oil temperature",{"path":639,"title":640,"short":641},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Foil-filter","Hydraulic oil filter of an injection molding machine","Oil filter",{"path":643,"title":644,"short":645},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Foil-cooler","Oil cooler (heat exchanger) of an injection molding machine","Oil cooler",{"path":647,"title":648,"short":649},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Foil-tank","Hydraulic oil tank of an injection molding machine","Oil tank",{"path":651,"title":652,"short":653},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fcooling-water-manifold","Cooling water manifold of an injection molding machine","Cooling water manifold",{"path":655,"title":656,"short":657},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fpressure-gauge","Hydraulic pressure gauge of an injection molding machine","Pressure gauge",{"path":659,"title":660,"short":661},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fpressure-transducer","Pressure transducer of an injection molding machine","Pressure transducer",{"diagram":663},"hydraulic-system",{"diagram":665},{"title":666,"description":667,"base":668,"labels":673,"items":682},"Parts of a hydraulic valve manifold","Line drawing of a hydraulic manifold block with a directional valve, a high-flow solenoid valve, a proportional valve, a relief valve, a cartridge valve and a check valve, numbered.",{"line":669},[670,671,672],"M60 296L226 296","M270 296L320 296L320 260","M440 260L440 300L600 300",[674,678],{"x":675,"y":676,"text":677},66,288,"P",{"x":679,"y":680,"text":681},596,292,"T",[683,701,722,741,760,778,798],{"id":684,"name":685,"role":686,"marker":687,"shapes":691},"block","Manifold block","Steel block drilled with oil passages. The valves bolt onto it or screw into it, which replaces most of the piping between them.",[688,689,688,690],380,336,260,{"solid":692,"line":694},[693],"M153 170h334a3 3 0 0 1 3 3v84a3 3 0 0 1 -3 3h-334a3 3 0 0 1 -3 -3v-84a3 3 0 0 1 3 -3z",[695,696,697,698,699,700],"M264 238a6 6 0 1 0 12 0a6 6 0 1 0 -12 0z","M334 238a6 6 0 1 0 12 0a6 6 0 1 0 -12 0z","M414 238a6 6 0 1 0 12 0a6 6 0 1 0 -12 0z","M268 238a2 2 0 1 0 4 0a2 2 0 1 0 -4 0z","M338 238a2 2 0 1 0 4 0a2 2 0 1 0 -4 0z","M418 238a2 2 0 1 0 4 0a2 2 0 1 0 -4 0z",{"id":702,"name":609,"role":703,"parts":704,"marker":706,"shapes":710},"directional","Solenoid valve that switches oil between the two ports of a cylinder or motor, to start, stop and reverse a movement.",[705],"HY-CV-02",[707,708,707,709],216,24,128,{"solid":711,"line":717,"hidden":720},[712,713,714,715,716],"M160 132h22a2 2 0 0 1 2 2v26a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-26a2 2 0 0 1 2 -2z","M186 128h60a2 2 0 0 1 2 2v38a2 2 0 0 1 -2 2h-60a2 2 0 0 1 -2 -2v-38a2 2 0 0 1 2 -2z","M250 132h22a2 2 0 0 1 2 2v26a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-26a2 2 0 0 1 2 -2z","M164 120h14a1 1 0 0 1 1 1v10a1 1 0 0 1 -1 1h-14a1 1 0 0 1 -1 -1v-10a1 1 0 0 1 1 -1z","M254 120h14a1 1 0 0 1 1 1v10a1 1 0 0 1 -1 1h-14a1 1 0 0 1 -1 -1v-10a1 1 0 0 1 1 -1z",[718,719],"M152 147L158 147","M274 147L280 147",[721],"M192 142h48a2 2 0 0 1 2 2v10a2 2 0 0 1 -2 2h-48a2 2 0 0 1 -2 -2v-10a2 2 0 0 1 2 -2z",{"id":723,"name":724,"role":725,"parts":726,"marker":728,"shapes":731},"high-flow","High-flow solenoid valve","Larger, pilot-operated directional valve: a small solenoid valve on top shifts the main spool. Used for clamping and injection on large machines.",[727],"HY-CV-15",[729,708,729,730],339,96,{"solid":732,"hidden":739},[733,734,735,736,737,738],"M292 120h86a2 2 0 0 1 2 2v46a2 2 0 0 1 -2 2h-86a2 2 0 0 1 -2 -2v-46a2 2 0 0 1 2 -2z","M298 100h16a2 2 0 0 1 2 2v16a2 2 0 0 1 -2 2h-16a2 2 0 0 1 -2 -2v-16a2 2 0 0 1 2 -2z","M318 96h44a2 2 0 0 1 2 2v20a2 2 0 0 1 -2 2h-44a2 2 0 0 1 -2 -2v-20a2 2 0 0 1 2 -2z","M366 100h16a2 2 0 0 1 2 2v16a2 2 0 0 1 -2 2h-16a2 2 0 0 1 -2 -2v-16a2 2 0 0 1 2 -2z","M300 90h12a1 1 0 0 1 1 1v8a1 1 0 0 1 -1 1h-12a1 1 0 0 1 -1 -1v-8a1 1 0 0 1 1 -1z","M368 90h12a1 1 0 0 1 1 1v8a1 1 0 0 1 -1 1h-12a1 1 0 0 1 -1 -1v-8a1 1 0 0 1 1 -1z",[740],"M301 138h68a3 3 0 0 1 3 3v10a3 3 0 0 1 -3 3h-68a3 3 0 0 1 -3 -3v-10a3 3 0 0 1 3 -3z",{"id":742,"name":613,"role":743,"parts":744,"marker":746,"shapes":750},"proportional","Sets pressure or flow in proportion to an electrical signal from the controller, so speeds and pressures follow the profile set on the screen.",[745],"HY-CV-04",[747,708,748,749],468,466,102,{"solid":751,"line":756,"hidden":758},[752,753,754,755],"M400 132h46a2 2 0 0 1 2 2v34a2 2 0 0 1 -2 2h-46a2 2 0 0 1 -2 -2v-34a2 2 0 0 1 2 -2z","M452 138h28a4 4 0 0 1 4 4v18a4 4 0 0 1 -4 4h-28a4 4 0 0 1 -4 -4v-18a4 4 0 0 1 4 -4z","M452 114h28a2 2 0 0 1 2 2v20a2 2 0 0 1 -2 2h-28a2 2 0 0 1 -2 -2v-20a2 2 0 0 1 2 -2z","M462 102h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2v-8a2 2 0 0 1 2 -2z",[757],"M474 139L474 163",[759],"M406 145h36a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-36a2 2 0 0 1 -2 -2v-8a2 2 0 0 1 2 -2z",{"id":761,"name":621,"role":762,"parts":763,"marker":765,"shapes":769},"relief","Limits the system pressure. When the pressure goes above its setting it opens and sends oil to the tank.",[764],"HY-CV-06",[766,767,768,767],616,214,580,{"solid":770,"line":775},[771,772,773,774],"M492 194h24a2 2 0 0 1 2 2v36a2 2 0 0 1 -2 2h-24a2 2 0 0 1 -2 -2v-36a2 2 0 0 1 2 -2z","M521 200h28a3 3 0 0 1 3 3v22a3 3 0 0 1 -3 3h-28a3 3 0 0 1 -3 -3v-22a3 3 0 0 1 3 -3z","M563 208h6a1 1 0 0 1 1 1v10a1 1 0 0 1 -1 1h-6a1 1 0 0 1 -1 -1v-10a1 1 0 0 1 1 -1z","M572 204h6a2 2 0 0 1 2 2v16a2 2 0 0 1 -2 2h-6a2 2 0 0 1 -2 -2v-16a2 2 0 0 1 2 -2z",[776,777],"M552 214L562 214","M523 214L527 207L532 221L537 207L542 221L547 214",{"id":779,"name":617,"role":780,"parts":781,"marker":783,"shapes":786},"cartridge","Valve inserted into a bore in the block, shown here in section. A spring-loaded poppet opens or closes a large passage; used for high flows in clamping, injection and ejection circuits.",[782],"HY-CV-08",[708,784,785,784],220,136,{"solid":787,"line":791,"hidden":795},[788,789,790],"M138 190h10a2 2 0 0 1 2 2v56a2 2 0 0 1 -2 2h-10a2 2 0 0 1 -2 -2v-56a2 2 0 0 1 2 -2z","M152 204h66a2 2 0 0 1 2 2v28a2 2 0 0 1 -2 2h-66a2 2 0 0 1 -2 -2v-28a2 2 0 0 1 2 -2z","M191 210h24a3 3 0 0 1 3 3v14a3 3 0 0 1 -3 3h-24a3 3 0 0 1 -3 -3v-14a3 3 0 0 1 3 -3z",[792,793,794],"M141 198a2 2 0 1 0 4 0a2 2 0 1 0 -4 0z","M141 242a2 2 0 1 0 4 0a2 2 0 1 0 -4 0z","M152 220L157 212L163 228L169 212L175 228L181 212L187 220",[796,797],"M220 220L250 220","M204 236L204 258",{"id":562,"name":799,"role":800,"parts":801,"marker":802,"shapes":805},"Check valve","Lets oil flow one way only, for example from the pump into the circuit, and blocks it from flowing back.",[567],[803,689,803,804],248,308,{"solid":806,"line":808,"hidden":811},[807],"M230 284h36a4 4 0 0 1 4 4v16a4 4 0 0 1 -4 4h-36a4 4 0 0 1 -4 -4v-16a4 4 0 0 1 4 -4z",[809,810],"M236 284L236 308","M260 284L260 308",[812,813],"M244 296a6 6 0 1 0 12 0a6 6 0 1 0 -12 0z","M242 289L242 303",[815],{"partNumber":567,"name":816,"subcategory":47,"subcategoryName":48,"shortDescription":817,"inStock":565,"zone":243,"compatibleMachines":818},"Check Valve","Hydraulic check valve for injection molding machine circuits.",[819,820],"Haitian MA Series","Haitian Jupiter Series",1793548983369]