[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-639596-105":59,"doc-detail-639596-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","pressure-unloading-valve-series-dwpa-and-dwpbu","Pressure Unloading Valve - Series DWPA... and DWPBU...","","Series DWPA... and DWPBU... cartridges are size 10, two-stage, high-performance pressure-unloading valves with an M24x1.5 mounting thread. The design combines a spool main stage and a leak-free ball-type pilot stage to switch from pump connection A→B opening to a bypass unloading state based on a selectable on-off pressure differential. When configured, changeover provides optional soft switching for less harsh transitions and includes integral pressure-relief function for accumulator charging and fast advance-to-feed changeover circuits. Typical limits: 315 bar max pressure and 60 I/min max flow, with defined pressure ranges and differential options.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/pressure-unloading-valve-series-dwpa-and-dwpbu/639596/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/pressure-unloading-valve-series-dwpa-and-dwpbu/639596.png","ImageObject",300,407,{"name":92,"@type":93},"Malam Tenang","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-26","2026-10-22",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What are the main components and operating stages of the DWPA... and DWPBU... cartridges?","Question",{"text":112,"@type":113},"They are size 10 two-stage cartridges with a spool-type main stage and a leak-free ball-type pilot stage.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the valve switch when configured using on-off pressure settings?",{"text":117,"@type":113},"On set-off, the cartridge opens the connection from A→B in response to rising pressures at ports A and X, and keeps it open until the selected on-off differential threshold is reached, then closes again at the corresponding on point.",{"name":119,"@type":110,"acceptedAnswer":120},"What is the purpose of the DWPBU.. soft-switching model, and what limits apply to it?",{"text":121,"@type":113},"DWPBU.. uses damped switching characteristics to make changeover less harsh. DWPBU-2 soft-switching cartridges are not suitable for applications using 2-pump systems or fast-advance→feed changeover circuits.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},639596,1793051593,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":29,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},962093532863,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Pressure Unloading Valve,Size 10  \nQmax=60 I/min,Pmax=315 bar  \nTwo-stage,various on-off pressure differentials,optional soft-switching versionSeries DWPA…,DWPBU...  \n# 1 Description\n\nSeries DWPA...and DWPBU...cartridges are size 10,twostage,high performance pressure-unloading valves with anM24x1.5 mounting thread.They consist of a spool-typemain stage and a leak-free,ball-type pilot stage.Unloadingvalves are used wherever a pump has to be disconnectedfrom and re-connected to a pressure circuit.For this pur-pose,either the 'Off pressure or the'On'pressure of the car-tridge can be set.When the 'Off pressure is set,the 'On'point will depend on the selected percentage on-off differen-tial,or the other way round.To disconnect the pump,thecartridge responds to rising pressures at ports A andXbyopening the connection from A→B.This connection is thenkept open until the selected percentage on-off differential isreached (falling pressure at port X)and the connection  \n# 2 Symbol\n\n3 Technical data  \n\n| General characteristics   | Description,value,unit   |\n| --- | --- |\n| Designation   | pressure unloading cartridge valve   |\n| Design   | two-stage,with manual adjustment,  \u003Cbr>various on-off pressure differentials,  \u003Cbr>optional soft-switching version   |\n| Mounting method   | screw-in cartridge M24×1.5   |\n| Tightening torque   | 65 Nm±10%  \u003Cbr>Can be fitted in steel  \u003Cbr>Can be fited in aluminium 50 Nm±10%   |\n| Size   | nominal size 10,cavity type DD   |\n\n·Compact construction forcavity type DD-M24×1,5  \n·Choice of 5 on-off differentials  \n·3 pressure ranges available  \n·With integral pressure-relief function  \n·Optional soft-switching model is available  \n·All exposed parts with zinc-nickel plating  \n·Can be fitted in a line-mounting body  \nA→B closes again(the 'On'point).The changeover to un-loaded bypass can be made less harsh (soft switching)byusing the DWPBU..model with damped switching charac-teristics,which is available as an alternative.These unloa-ding valves are predominantly used in accumulator-char-ging circuits,2-pump systems,and circuits for fast-ad-vance→feed changeover,and in such cases the cartridgesalso provide a pressure-relief function e.g.for protecting thepump (see the application examples).All external parts ofthe cartridge are zinc-nickel plated according to DIN EN ISO19598 and are thus suitable for use in the harshest operat-ing environments.If you intend to manufacture your own ca-vities or are designing a line-mounting installation,pleaserefer to the section “Related data sheets”.  \nReference:400-P-380101-EN-02  \nATTENTION!1)  \nAny back-pressure in port B(tank)directly redu-ces the on-off pressure differential.Recommended back-pressures1 bar.  \n# 4 Performance graphs measured with oilviscosity 33mm²/s(CSt)\n\n△p=f (Q)Pressure drop-Flow rate characteristic(for unloaded bypass,valve open)  \n△p [bar]  \n| General characteristics   | Description,value,unit   |\n| --- | --- |\n| Weight   | 0.48 kg   |\n| Mounting attitude   | unrestricted   |\n| Ambient temperature range   | -25℃..+80℃   |\n\n\n| Hydraulic characteristics   | Description,value,unit   |\n| --- | --- |\n| Maximum operating pressure   | 315 bar   |\n| Maximum flow rate   | 60 I/min   |\n| Nominal pressure ranges   | L=(40...110 bar),M=(80..210 bar),N=(180...315 bar)   |\n| On-off differentials 1)  \u003Cbr>(on-off differential from 'Off(unload)pressure)   | 8…12%(pressure ranges M and Nonly)  \u003Cbr>13 ...17%  \u003Cbr>17...23%  \u003Cbr>27...33%  \u003Cbr>37 ...43%   |\n| Flow drection   | A→B,see symbols   |\n| Hydraulic fluid   | HL and HLP mineral oil to DIN 51524;  \u003Cbr>for other fluids,please contact BUCHER   |\n| Hydraulic fluid temperature range   | -25℃...+80℃   |\n| Viscosity range   | 10…650 mm²/s(CSt),recommended 15..250 mm²/s(cSt)   |\n| Minimum fluid cleanliness  \u003Cbr>Cleanliness class to ISO 4406:1999   | class 20/18/15   |\n\n△p=f (Q)Pressure drop-Flow rate characteristic  \n(pressure-relief function)  \np=f (Q)Performance limits  \nOn-off differential 8...12%  \n△p [bar]  \np=f (Q)P","cbCaisggNrqHBsiN","https://ap.wps.com/l/cbCaisggNrqHBsiN","pdf",749549,"English","# 1 Description\n# 2 Symbol\n# 3 Technical data\n# 4 Performance graphs\n# 5 Dimensions & sectional view\n# 6 Installation information\n# 7 Application examples","[{\"question\":\"What are the main components and operating stages of the DWPA... and DWPBU... cartridges?\",\"answer\":\"They are size 10 two-stage cartridges with a spool-type main stage and a leak-free ball-type pilot stage.\"},{\"question\":\"How does the valve switch when configured using on-off pressure settings?\",\"answer\":\"On set-off, the cartridge opens the connection from A→B in response to rising pressures at ports A and X, and keeps it open until the selected on-off differential threshold is reached, then closes again at the corresponding on point.\"},{\"question\":\"What is the purpose of the DWPBU.. soft-switching model, and what limits apply to it?\",\"answer\":\"DWPBU.. uses damped switching characteristics to make changeover less harsh. DWPBU-2 soft-switching cartridges are not suitable for applications using 2-pump systems or fast-advance→feed changeover circuits.\"}]","Pressure Unloading Valve - Series DWPA... and DWPBU... | PDF",1792704517,15]