4/2 and 4/3 directional valves, internally pilot-operated, externally pilot-operated

Transcription

1 1/ / nd /3 directionl vlves, internlly pilot-operted, externlly pilot-operted RE 751-E/0.1 Replces: ype H-WEH E Sizes 10, 1, 5, 3 Component series,, 7 Mximum operting pressure 350 r Mximum flow 1100 l/min H8097 E units For potentilly explosive tmospheres Informtion on explosion protection: re of ppliction in ccordnce with the Explosion rotection Directive 01/3/EU: II G ype of protection of the vlve solenoids: Ex e m IIC G ccording to EN / EN le of contents Contents ge Fetures 1 Ordering code, 3 Symols 7 Function, section 8 ilot oil supply 9 echnicl dt 9 1 Electricl connection 13, 1 Chrcteristic curves 15 erformnce limits Switching time djustment, pressure reducing vlve, prelod vlve 0 Dimensions 1 5 Further informtion Fetures For intended use in potentilly explosive tmosphere For suplte mounting orting pttern ccording to ISO 01 Spring centering, spring end position or hydrulic end position Wet-pin DC or C solenoids Solenoid coil rottle y 90 Mnul override, optionl Electricl connection s individul connection with cle glnd Switching time djustment, optionl relod vlve in chnnel of the min vlve, optionl

2 / osch Rexroth G Hydrulics H-WEH E... RE 751-E Ordering code H WEH E E Up to 350 r = H -wy version = Directionl vlve, electro-hydruliclly ctuted = WEH Size NG10 = 10 NG1 = 1 NG5 = 5 NG3 = 3 Control spool return min vlve y mens of springs = no code Hydruliclly 1) = H For symols, see pge Component series 0 to 9 NG10 = (0 to 9: unchnged instlltion nd connection dimensions) Component series 0 to 9 NG5 (W.H 5.) nd NG3 = (0 to 9: unchnged instlltion nd connection dimensions) Component series 70 to 79 NG1 = 7 (70 to 79: unchnged instlltion nd connection dimensions) Control spool return in the pilot control vlve with spool positions nd solenoids only possile with control spool C, D, K, Z nd hydrulic control spool return in the min vlve: Without spring return = O Without spring return with detent = OF ilot control vlve with wet-pin solenoids, high-power vlve (RE 3178-E) = E Direct voltge V = G C voltge 30 V 50/0 Hz = W30R For further ordering codes for other voltges, see pge 1 Without mnul override = no code With mnul override (stndrd) = N Explosion protection "Incresed sfety" = E For detils see informtion on explosion protection, pge 11 ilot oil supply externl, pilot oil return externl ) = no code ilot oil supply internl, pilot oil return externl 3) = E ilot oil supply internl, pilot oil return internl 3) = E ilot oil supply externl, pilot oil return internl ) = Notice: he mnul override cnnot e llocted sfety function nd my only e used up to tnk pressure of 50 r. Explntion of the footnotes, see pge 3

3 RE 751-E H-WEH E... Hydrulics osch Rexroth G 3/ Ordering code Z Z = no code = S = S = no code = V = NR sels FKM sels (other sels upon request) Notice: Oserve comptiility of sels with hydrulic fluid used. no code = Without pressure reducing vlve D3 = With pressure reducing vlve ) relod vlve (not for NG10) no code = Without prelod vlve,5 = With prelod vlve (p o =.5 r) no code = 08 = 10 = 1 = 15 = hrottle insert Without throttle insert hrottle Ø 0.8 mm hrottle Ø 1.0 mm hrottle Ø 1. mm hrottle Ø 1.5 mm Electricl connection Solenoid with terminl ox nd cle glnd, for detils see Electricl connection chpter Without switching time djustment Switching time djustment s supply control Switching time djustment s dischrge control 1) spool positions (hydrulic end position): only symols C, D, K, Z, ) Externl pilot oil supply or pilot oil return : Oserve the mximum pilot pressure ccording to pge 10! 3) Internl pilot oil supply (version "E" nd "E"): Oserve the minimum pilot pressure ccording to pge 10! In order to prevent indmissily high pressure peks, throttle insert "10" hs to e provided in port of the pilot control vlve (see pge 9). ou must moreover provide the pressure reducing vlve "D3". ) Only in connection with throttle insert "10"

4 / osch Rexroth G Hydrulics H-WEH E... RE 751-E Symols spool positions 3 spool positions../....h../....h../o..h../of ). = E 1) = C = D = K = Z = E19 ) = F = G = H = J../....H../.. = = L = M = = Q = R = S ) 1) Exmple: Symol E with switching position "" Order exmple: H-WEH 1 E7/EGN9DESZ10..V... ) Only for NG1 Notices: Representtion of the symols ccording to DIN ISO Hydrulic interim positions re represented y dshes. Other symols upon request = = U = V = W

5 Hydrulics osch Rexroth G RE 751-E H-WEH E... 5/ Symols: Vlve with spool positions Vlves with spring end position Vlves with hydrulic end position = externl = externl ype H-WEH.../... ype H-WEH..H.../... ype H-WEH..H.../O... ype H-WEH..H.../OF...,,,,,,,, = internl = externl ype H-WEH.../...E... ype H-WEH..H.../...E... ype H-WEH..H.../O...E... ype H-WEH..H.../OF...E...,,,,,,,, Continution, see next pge

6 / osch Rexroth G Hydrulics H-WEH E... RE 751-E Symols: Vlve with spool positions Continution from previous pge Vlves with spring end position Vlves with hydrulic end position ype H-WEH.../...E... ype H-WEH..H.../...E... ype H-WEH..H.../O...E... ype H-WEH..H.../OF...E... = internl = internl,,,,,,,, ype H-WEH.../... ype H-WEH..H.../... ype H-WEH..H.../O... ype H-WEH..H.../OF... = externl = internl,,,,,,,,

7 RE 751-E H-WEH E... Hydrulics osch Rexroth G 7/ Symols: Vlves with 3 spool positions Vlves with spring-centered zero position ype H-WEH.../... ype H-WEH.../...E... = externl = externl 0,, 0 = internl = internl 0,, 0 = internl = externl 0,, ype H-WEH.../...E... 0 = externl = internl 0,, ype H-WEH.../... 0

8 8/ osch Rexroth G Hydrulics H-WEH E... RE 751-E Function, section ype H-WEH 1 E... Directionl vlves type H-WEH he vlve type H-WEH is directionl spool vlve with electro-hydrulic ctution. It controls the strt, stop nd direction of flow. he directionl vlve siclly consists of the min vlve with housing (1), the min control spool (), one or two return springs (3.1) nd (3.), s well s the pilot control vlve () with one or two solenoids "" (5.1) nd/or "" (5.). he min control spool () in the min vlve is held in the zero or initil position y the springs or y mens of pressuriztion. In the initil position, the two spring chmers () nd (8) re connected with the tnk in depressurized form vi the pilot control vlve (). he pilot control vlve is supplied with pilot oil vi the control line (7). Supply cn e effected internlly or externlly (externlly vi port ). Upon ctution of the pilot control vlve, e. g. solenoid "", the pilot control spool (10) is moved to the left nd thus, the spring chmer (8) is pressurized with pilot pressure. he spring chmer () remins depressurized. he pilot pressure cts on the left side of the min control spool () nd moves it ginst the spring (3.1). his connects ports with nd with in the min vlve. When the solenoid is switched off, the pilot control spool returns into the initil position (except for impulse spool). he spring chmer (8) is unloded to the tnk. he pilot oil from the spring chmer is displced into chnnel vi the pilot control vlve. he pilot oil supply nd return cn e effected internlly or externlly. he mnul override (9) llows control spool (10) to e moved without solenoid energiztion. Notices: he min control spool () is held in centrl position y the return springs (3.1) nd (3.) in spring chmers () nd (8) without pilot pressure, even if the vlve is positioned for exmple verticlly. Due to the design principle, internl lekge is inherent to the vlves, which my increse over the life cycle.

9 RE 751-E H-WEH E... Hydrulics osch Rexroth G 9/ ilot oil supply ype H-WEH he pilot oil supply is effected externlly vi the chnnel from seprte circuit. he pilot oil return is effected externlly vi the chnnel into the tnk. ype H-WEH E he pilot oil supply is effected internlly from the chnnel of the min vlve. he pilot oil return is effected externlly vi the chnnel into the tnk. In the suplte, port is closed. ype H-WEH E he pilot oil supply is effected internlly from the chnnel of the min vlve. he pilot oil return is effected internlly vi the chnnel into the tnk. In the suplte, ports nd re closed. ype H-WEH he pilot oil supply is effected externlly vi the chnnel from seprte circuit. he pilot oil return is effected internlly vi the chnnel into the tnk. In the suplte, port is closed. hrottle insert Use of the throttle insert () is necessry if the pilot oil supply in the chnnel of the pilot control vlve (1) is to e limited. he throttle insert () is inserted in chnnel of the pilot control vlve (1). 1 ilot control vlve hrottle insert 3 Sel ring Min vlve 1 3 echnicl dt generl Instlltion position ny; horizontl with vlves with hydrulic control spool return "H" nd control spool C, D, K, Z or mient temperture rnge C ) Storge temperture rnge C Mximum storge time ers 1 Sizes NG Weight Vlve with one solenoid kg Vlve with two solenoids, spring-centered kg Switching time djustment kg 0.8 ressure reducing vlve kg 0. Surfce Vlve ody ilot control vlve Glvnized protection Min vlve Glvnized Solenoid Glvnized MFd vlue ccording to EN ISO 1389 ers 100 1) Oserve the "Specil ppliction conditions for sfe ppliction" on pge 11.

10 10/ osch Rexroth G Hydrulics H-WEH E... RE 751-E echnicl dt hydrulic Sizes NG Mximum operting pressure orts,, r 350 ort with pilot oil return externl r 50 with pilot oil return internl r 10 ort with pilot oil return externl r 10 Flow of the min vlve l/min up to 10 up to 300 up to 50 up to 1100 Mximum pilot pressure r 50 (with higher pilot pressure, use of pressure reducing vlve is required) Minimum pilot pressure with externl or internl pilot oil supply (control spool D, K, E, J, L, M, Q, R, U, W) 3-spool position vlve, spring-centered r spool position vlve, spring end position r spool position vlve, hydrulic end position r with internl pilot oil supply (control spools C, F, H,,, V, Z, S ) ) r.5 3).5 ).5 ).5 ) ilot volume for switching process 3-spool position vlve, spring-centered cm spool position vlve cm ilot volume for shortest switching time l/min pprox. 35 pprox. 35 pprox. 35 pprox. 5 Hydrulic fluid See tle elow Hydrulic fluid temperture rnge C (NR sels) (FKM sels) Viscosity rnge mm /s Mximum dmissile degree of contmintion of the hydrulic fluid Clss 0/18/15 5) Clenliness clss ccording to ISO 0 (c) Mximum surfce temperture C See informtion on explosion protection on pge 11 Hydrulic fluid Clssifiction Suitle seling Stndrds Dt sheet mterils Minerl oils HL, HL, HLD NR, FKM DIN io-degrdle Insolule in wter HEG NR, FKM ISO HEES FKM Solule in wter HEG FKM ISO Flme-resistnt Contining wter Importnt informtion on hydrulic fluids: For further informtion nd dt on the use of other hydrulic fluids, plese refer to the dt sheets ove or contct us! here my e limittions regrding the technicl vlve dt (temperture, pressure rnge, life cycle, mintennce intervls, etc.)! Ignition temperture > 180 C HFC (Fuchs Hydrotherm M, etrofer Ultr Sfe 0) NR ISO Flme-resistnt contining wter: Mximum pressure differentil per control edge 50 r ressure pre-loding t the tnk port > 0% of the pressure differentil, otherwise incresed cvittion Life cycle s compred to opertion with minerl oil HL, HL 50 to 100% Footnotes, see pge 11

11 RE 751-E H-WEH E... Hydrulics osch Rexroth G 11/ echnicl dt electric Voltge type Direct voltge lternting voltge ville voltges V, 8, 9, , 30 Voltge tolernce (nominl voltge) % ±10 dmissile residul ripple % < 5 Duty cycle / operting mode ccording to VDE 0580 Switching time ccording to ISO 03 ) See pge 1 S1 (continuous opertion) Mximum switching frequency 1/h Nominl power t n mient temperture of 0 C W 17 Mximum power with 1.1 x nominl voltge nd n mient temperture of 0 C W 0. rotection clss ccording to EN 059 I (with correctly instlled electricl connection) Notice: Solenoids for C voltge re DC solenoids with integrted rectifier Informtion on explosion protection re of ppliction in ccordnce with the II G explosion protection directive 01/3/EU ype of protection vlve c (EN 133-5) Mximum surfce temperture 7) C 135 emperture clss ype of protection vlve solenoid ccording to Ex e m IIC G EN / EN ype exmintion certificte solenoid KEM 0E0 "IECEx Certificte of Conformity" solenoid IECEx DEK mient temperture rnge C ) Specil ppliction conditions for sfe ppliction In cse of vlves with two solenoids, mximlly one of the solenoids my e energized t time. Simultneous power supply of severl vlves in nk ssemly is possile if the mient temperture does not exceed 0 C. In cse of nk ssemly, if only one of the solenoids is energized t time, nd during individul opertion, the mximum mient temperture my not exceed 70 C. he mximum temperture of the surfce of the vlve jcket is 10 C. his hs to e considered when selecting the connection cle nd/or contct of the connection cle with the surfce of the jcket is to e prevented. 1) Oserve the "Specil ppliction conditions for sfe ppliction" on pge 11. ) Symol S only for NG1 3) For symols C, F, G, H,,, V, Z, n internl pilot oil supply without prelod vlve is only possile if the flow from in the centrl position (for 3-spool position vlve) or while crossing the centrl position (for -spool position vlve) is so lrge tht the pressure differentil of reches vlue of t lest.5 r. ) For symols C, F, G, H,,, V, Z, S 1) y mens of prelod vlve (not Size 10) or correspondingly high flow 5) he clenliness clsses specified for the components must e dhered to in hydrulic systems. Effective filtrtion prevents fults nd t the sme time increses the life cycle of the components. For the selection of the filters, see ) he switching times were determined t hydrulic fluid temperture of 0 C nd viscosity of cst. Deviting hydrulic fluid tempertures cn result in different switching times. Switching times chnge dependent on operting time nd ppliction conditions. 7) Surfce temperture > 50 C, provide contct protection.

12 1/ osch Rexroth G Hydrulics H-WEH E... RE 751-E echnicl dt Switching times (= Contcting t the pilot control vlve until strt of opening of the control edge in the min vlve nd chnge in the control spool stroke y 95%) ilot pressure r Spring ON OFF NG10 without throttle insert ms with throttle insert ms NG1 without throttle insert ms with throttle insert ms NG5 without throttle insert ms with throttle insert ms NG3 without throttle insert ms with throttle insert ms Notices: he switching times re mesured ccording to ISO 03 with HL, ϑ oil = 0 C ± 5 C. With different oil tempertures, vritions re possile. he switching times increse y pprox. 30 ms if the pressure reducing vlve "D3" is used. he switching times hve een determined under idel conditions nd my differ in the system, depending on the ppliction conditions. Free flow cross-sections in zero position with control spools Q, V nd W Control spool Q, mm Control spool V, mm , mm Control spool W, mm

13 RE 751-E H-WEH E... Hydrulics osch Rexroth G 13/ Electricl connection he type-exmintion tested vlve solenoid of the vlve is equipped with terminl ox nd type-tested cle glnd. he connection is polrity-independent. Solenoids to e connected to C voltge re equipped with n integrted rectifier. 1 Notice When estlishing the electricl connection, the protective erthing conductor (E ) hs to e connected properly. 3 roperties of the connection terminls osition Function Connectle line cross-section 1 Operting voltge connection Single-wire mm Finely strnded mm Connection for protective erthing conductor Single-wire mx..5 mm Finely strnded mx. 1.5 mm 3 Connection for potentil equliztion conductor Single-wire mm Finely strnded mm Cle glnd ype pprovl II G Ex e IIC G hreded connection M0 x 1.5 rotection clss ccording to EN 059 I (with correctly instlled electricl connection) Line dimeter mm Seling Outer sheth seling Connection line Line type Non-rmored cles nd lines (outer sheth seling) emperture rnge C 30 > +110

14 1/ osch Rexroth G Hydrulics H-WEH E... RE 751-E Electricl connection Circuit digrms Direct voltge, polrity-independent lternting voltge +( ) (+) Over-current fuse nd switch-off voltge pek Notice: fuse which corresponds to the rted current ccording to DIN 1571 nd EN / IEC 017 hs to e connected upstrem of every vlve solenoid (mx. 3 x I rted ). he shut-off threshold of the fuse hs to mtch the prospective short-circuit current of the supply source. he prospective short-circuit current of the supply source my mount to mximum of his fuse my only e instlled outside the potentilly explosive tmosphere or must e of n explosion-proof design. When inductivities re switched off, voltge peks result which my cuse fults in the connected control electronics. he voltge pek must e dmped y suitle externl circuitry. We recommend circuitry with suppressor diode with limittion voltge of pprox. 50 V. Voltge dt in the vlve type code Nominl voltge vlve solenoid Rted current vlve solenoid Rted current for externl miniture fuse: medium timelg (M) ccording to DIN 1571 nd EN/IEC 017 Rted voltge for externl miniture fuse: medium timelg (M) ccording to DIN 1571 nd EN/IEC 017 Mximum voltge vlue upon switch-off Interference protection circuit G V DC DC 800 m 50 V 90 V G8 8 V DC 0.35 DC 00 m 50 V 00 V G9 9 V DC DC 00 m 50 V 370 V Suppressor diode i-directionl G V DC DC 00 m 50 V 390 V W110R W30R 110 V C 30 V C 0.13 C C 00 m 80 m 50 V 50 V 3 V 3 V ridge rectifier nd suppressor diode

15 RE 751-E H-WEH E... Hydrulics osch Rexroth G 15/ Chrcteristic curves: ype H-WEH 10 (mesured with HL, ϑ oil = 0 C ± 5 C) p - q V chrcteristic curves ressure differentil in r Flow in l/min Symol Spool position Symol Zero position E,, D 5 F 1 1 F 3 G, G, 7 H, C 1 H J, K L 3 1 L 3 M Q, V, W, Z 3 5 R 3 U U erformnce limits: ype H-WEH 10 (mesured with HL, ϑ oil = 0 C ± 5 C) - nd 3-spool position vlves mximum flow q V in l/min Symol Operting pressure p mx in r E, J, L, M, Q, R, U, V, W, C, D, K, Z, H G, F, Importnt notices see pge 19.

16 1/ osch Rexroth G Hydrulics H-WEH E... RE 751-E Chrcteristic curves: ype H-WEH 1 (mesured with HL, ϑ oil = 0 C ± 5 C) p - q V chrcteristic curves 8 ressure differentil in r Flow in l/min Symol Spool position E,, D E F G, H, C, Q, V, Z J, K, L Symol Spool position M, W R U 3 5 S erformnce limits: ype H-WEH 1 (mesured with HL, ϑ oil = 0 C ± 5 C) -spool position vlve mximum flows q V in l/min Symol Operting pressure p mx in r externl, spring end position in the min vlve (with p St min =1 r) C, D, K,, Z externl, spring end position in the min vlve 1) C D, K Z externl, hydrulic end position in the min vlve HC, HD, HK, HZ, H spool position vlve mximum flows q V in l/min Control spool Operting pressure p mx in r externl, spring centering in the min vlve E, E19, H, J, L, M, Q, U, W, R F, G, S V ) If the specified flow vlues re exceeded, the function of the return spring is no longer gurnteed if the pilot pressure fils! With control spools V, Z nd HZ, the prelod vlve is not required for flows > 180 l/min. Importnt notices see pge 19.

17 RE 751-E H-WEH E... Hydrulics osch Rexroth G 17/ Chrcteristic curves: ype H-WEH 5 (mesured with HL, ϑ oil = 0 C ± 5 C) p - q V chrcteristic curves ressure differentil in r symol R Flow in l/min Symol G centrl position 8 Symol centrl position Chrcteristic curve selection Symol Spool position E F G 3 1 H 3 J, Q 3 5 Symol Spool position L 3 3 M R 1 1 Symol Spool position U 1 1 V 3 W erformnce limits: ype H-WEH 5 (mesured with HL, ϑ oil = 0 C ± 5 C) -spool position vlve mximum flows q V in l/min Symol Operting pressure p mx in r externl, spring end position in the min vlve (with p St min =13 r) C, D, K,, Z externl, spring end position in the min vlve 1) C D, K Z externl, hydrulic end position in the min vlve HC, HD, HK, HZ, H HC../O.. HD../O.. HK../O HZ../O.. HC../OF.. HD../OF.. HK../OF.. HZ../OF spool position vlve mximum flows q V in l/min Symol Operting pressure p mx in r externl, spring centering in the min vlve E, L, M, Q, U, W, G, F H J V R ) If the specified flow vlues re exceeded, the function of the return spring is no longer gurnteed if the pilot pressure fils! Importnt notices see pge 19.

18 18/ osch Rexroth G Hydrulics H-WEH E... RE 751-E Chrcteristic curves: ype H-WEH 3 (mesured with HL, ϑ oil = 0 C ± 5 C) ressure differentil in r p - q V chrcteristic curves Symol E, R nd W Flow in l/min ressure differentil in r p - q V chrcteristic curves Symol G nd Flow in l/min Symol Spool position E 3 R 3 1 W 3 Symol Spool position G erformnce limits: ype H-WEH 3 (mesured with HL, ϑ oil = 0 C ± 5 C) -spool position vlve mximum flows q V in l/min Symol Operting pressure p mx in r externl, spring end position in the min vlve (with p St min =10 r) C, D, K,, Z externl, spring end position in the min vlve 1) C D, K Z externl, hydrulic end position in the min vlve HC, HD, HK, HZ, H spool position vlve mximum flows q V in l/min Symol Operting pressure p mx in r externl, spring centering in the min vlve E, J, L, M, Q, U, W, R G,, H, F, V ) If the specified flow vlues re exceeded, the function of the return spring is no longer gurnteed if the pilot pressure fils! Importnt notices see pge 19.

19 RE 751-E H-WEH E... Hydrulics osch Rexroth G 19/ erformnce limits: importnt notices Notice (pplies to ll sizes): he specified switching power limits re vlid for use with two directions of flow (e. g. from to nd simultneous return flow from to t rtio of 1:1). Due to the flow forces cting within the vlves, the dmissile switching power limit my e considerly lower with only one direction of flow (e. g. from to while port is locked, with flow in the sme or different directions)! In such cses, plese consult us! he switching power limit ws estlished while the solenoids were t operting temperture, t 10% undervoltge nd without tnk preloding. NG1 NG5 NG3 With pilot oil supply internl, prelod vlve hs to e used for flows < 10 l/min due to the negtive overlp of symols V, C, Z nd HC, HZ. With pilot oil supply internl, sufficient flow hs to e ensured due to the negtive overlp of symols F, G, H,, S nd (for the determintion of the required flow, see "relod vlve" chrcteristic curves (pge 0). If the required flow is not reched, prelod vlve hs to e used (see pge 10). With pilot oil supply internl, prelod vlve hs to e used for flows < 180 l/min due to the negtive overlp of the symols Z, HZ nd V. With pilot oil supply internl, sufficient flow hs to e ensured due to the negtive overlp of symols C, HC, F, G, H,, nd (for the determintion of the required flow, see "relod vlve" chrcteristic curves (pge 0). If the required flow is not reched, prelod vlve hs to e used (see pge 10). With pilot oil supply internl, prelod vlve hs to e used for flows < 180 l/min due to the negtive overlp of the symols Z, HZ nd V. With pilot oil supply internl, sufficient flow hs to e ensured due to the negtive overlp of symols C, HC, F, G, H,, nd (for the determintion of the required flow, see "relod vlve" chrcteristic curves (pge 0). If the required flow is not reched, prelod vlve hs to e used (see pge 10).

20 RE 751-E H-WEH E... Hydrulics osch Rexroth G 0/ Switching time djustment, pressure reducing vlve, prelod vlve Switching time djustment "S/S" he switching time of the min vlve (1) is influenced y using twin throttle check vlve (), type ZFS. Symol (3) shows the switching time djustment "S" (supply control), symol () shows the switching time djustment "S" (dischrge control) ype H-WEH 10../ S or S 3 1 ressure reducing vlve "D3" With the design internl pilot oil supply (E or E) or externl pilot oil supply nd pilot pressure of more thn 50 r, the vlve must e ordered with pressure reducing vlve (5), type ZDRO, nd throttle insert "10". Ordering code: "10..D3" ype H-WEH 10../ /..D3 5 relod vlve ",5" (not for NG10) In cse of vlves with depressurized circultion nd internl pilot oil supply, prelod vlve is required in chnnel of the min vlve in order to uild up the minimum pilot pressure. Ordering code: ",5" he pressure differentil of the prelod vlve is to e dded to the pressure differentil of the min vlve (see chrcteristic curves) to result in one totl vlue. he crcking pressure mounts to pprox..5 r. p q V chrcteristic curve (mesured with HL, ϑ Oil = 0 C ± 5 C) ressure differentil in r Flow in l/min 1 = NG1 = NG5 3 = NG3

21 RE 751-E H-WEH E... Hydrulics osch Rexroth G 1/ Dimensions: ype H-WEH 10 (dimensions in mm) ,01/100 Rzmx 35 Required surfce qulity of the vlve contct surfce 9 5,5 110,5 Ø, Ø , F1 F 1 F F Supltes (seprte order) with porting pttern ccording to ISO , see dt sheet Notice: Supltes re no components in the sense of directive 01/3/EU nd cn e used fter the mnufcturer of the overll system hs conducted n ssessment of the risk of ignition. he "G...J3" versions re free from luminum nd/or mgnesium nd glvnized. Vlve mounting screws (seprte order) For resons of stility, exclusively use the following vlve mounting screws: hexgon socket hed cp screws ISO 7 - Mx flZn-0h-L (friction coefficient µ totl = 0.09 to 0.1) Item explntions see pge 5.

22 / osch Rexroth G Hydrulics H-WEH E... RE 751-E Dimensions: ype H-WEH 1 (dimensions in mm) ,1 1 Ø11 Ø, Ø18 Ø , 1 0,01/100 Rzmx Required surfce qulity of the vlve contct surfce , 1, 35 9,9 1 F1 F G F5 G1 F 1 F F3 9 Supltes (seprte order) with porting pttern ccording to ISO , see dt sheet Notice: Supltes re no components in the sense of directive 01/3/EU nd cn e used fter the mnufcturer of the overll system hs conducted n ssessment of the risk of ignition. he "G...J3" versions re free from luminum nd/or mgnesium nd glvnized. Vlve mounting screws (seprte order) For resons of stility, exclusively use the following vlve mounting screws: hexgon socket hed cp screws ISO 7-M10x flZn-0h-L (friction coefficient totl: ccording to VD ) hexgon socket hed cp screws ISO 7-Mx flZn-0h-L (friction coefficient µ totl = 0.09 to 0.1) Item explntions see pge 5.

23 RE 751-E H-WEH E... Hydrulics osch Rexroth G 3/ Dimensions: ype H-WEH 5 (dimensions in mm) ,01/100 1 Rzmx ,5 9 Required surfce qulity of the vlve contct surfce 99, Ø0 Ø1 1 1 F1 F5 G7 F F G F F Supltes (seprte order) with porting pttern ccording to ISO , see dt sheet Notice: Supltes re no components in the sense of directive 01/3/EU nd cn e used fter the mnufcturer of the overll system hs conducted n ssessment of the risk of ignition. he "G...J3" versions re free from luminum nd/or mgnesium nd glvnized. Vlve mounting screws (seprte order) For resons of stility, exclusively use the following vlve mounting screws: hexgon socket hed cp screws ISO 7-M1x flZn-0h-L (friction coefficient µ totl = 0.09 to 0.1) Item explntions see pge 5.

24 / osch Rexroth G Hydrulics H-WEH E... RE 751-E Dimensions: ype H-WEH 3 (dimensions in mm) ,01/100 9 Rzmx 1 1,5 10,5 75,5 8,5 8,5 8,5 75,5 315, Required surfce qulity of the vlve contct surfce Ø19 7 Ø33 Ø 3 0,5 F1 F5 G1 F ,5 00 F G F F3 11,5 190,5 57 Supltes (seprte order) with porting pttern ccording to ISO , see dt sheet Notice: Supltes re no components in the sense of directive 01/3/EU nd cn e used fter the mnufcturer of the overll system hs conducted n ssessment of the risk of ignition. he "G...J3" versions re free from luminum nd/or mgnesium nd glvnized. Vlve mounting screws (seprte order) For resons of stility, exclusively use the following vlve mounting screws: hexgon socket hed cp screws ISO 7-M0x flZn-0h-L (friction coefficient µ totl = 0.09 to 0.1) Item explntions see pge 5.

25 RE 751-E H-WEH E... Hydrulics osch Rexroth G 5/ Dimensions 1 Min vlve ilot control vlve type WE E ccording to dt sheet 3178-E.1 ilot control vlve type WE D (1 solenoid "") for min vlves with symol C, D, K, Z symol HC, HD, HK, HZ ilot control vlve type WE J... (1 solenoid "") for min vlves with symol E, F, etc., spring return. ilot control vlve type WE... (1 solenoid "") for min vlves with symol symol H ilot control vlve type WE J... (1 solenoid "") for min vlves with symol E, F, etc., spring return.3 ilot control vlve type WE J ( solenoids) for min vlves with 3 spool positions, spring-centered 3.1 Vlve solenoid "" 3. Vlve solenoid "" Switching time djustment, optionl 5 ressure reducing vlve, optionl Mchined vlve contct surfce orting pttern ccording to: ISO for NG10 ISO for NG1 ISO for NG5 ISO for NG3 7 Nme plte for the pilot control vlve 8 Nme plte for the complete vlve 9 R-rings/O-rings 10 -spool position vlves with spring end position in the min vlve (C, D, K, Z) 11 -spool position vlves with spring end position in the min vlve () 1 3-spool position vlves, spring-centered -spool position vlves with hydrulic end position in the min vlve 13 erminl ox 1 Locking pin 15 Mnul override, optionl 1 Spce required to remove the solenoid coil

26 / osch Rexroth G Hydrulics H-WEH E... RE 751-E Further informtion Supltes Dt sheet 5100 Directionl spool vlves, direct operted, with solenoid ctution Dt sheet 3178-E Use of non-electricl hydrulic components in n explosive environment (E) Dt sheet Hydrulic fluids on minerl oil sis Dt sheet 900 Environmentlly comptile hydrulic fluids Dt sheet 901 Flme-resistnt, wter-free hydrulic fluids Dt sheet 90 Flme-resistnt hydrulic fluids - contining wter (HFE, HFS, HF, HFC) Dt sheet 903 Directionl spool vlves, pilot-operted, with electro-hydrulic ctution Operting instructions 751-E- Directionl spool vlves, direct operted, with solenoid ctution Operting instructions 3178-E- Selection of filters Informtion on ville spre prts osch Rexroth G Hydrulics Zum Eisengießer Lohr m Min, Germny hone +9 (0) 93 5 / 18-0 documenttion@oschrexroth.de his document, s well s the dt, specifictions nd other informtion set forth in it, re the exclusive property of osch Rexroth G. It my not e reproduced or given to third prties without its consent. he dt specified ove only serve to descrie the product. No sttements concerning certin condition or suitility for certin ppliction cn e derived from our informtion. he informtion given does not relese the user from the oligtion of own judgment nd verifiction. It must e rememered tht our products re suject to nturl process of wer nd ging.

27 RE 751-E H-WEH E... Hydrulics osch Rexroth G 7/ Notes osch Rexroth G Hydrulics Zum Eisengießer Lohr m Min, Germny hone +9 (0) 93 5 / 18-0 documenttion@oschrexroth.de his document, s well s the dt, specifictions nd other informtion set forth in it, re the exclusive property of osch Rexroth G. It my not e reproduced or given to third prties without its consent. he dt specified ove only serve to descrie the product. No sttements concerning certin condition or suitility for certin ppliction cn e derived from our informtion. he informtion given does not relese the user from the oligtion of own judgment nd verifiction. It must e rememered tht our products re suject to nturl process of wer nd ging.

28 8/ osch Rexroth G Hydrulics H-WEH E... RE 751-E Notes osch Rexroth G Hydrulics Zum Eisengießer Lohr m Min, Germny hone +9 (0) 93 5 / 18-0 documenttion@oschrexroth.de his document, s well s the dt, specifictions nd other informtion set forth in it, re the exclusive property of osch Rexroth G. It my not e reproduced or given to third prties without its consent. he dt specified ove only serve to descrie the product. No sttements concerning certin condition or suitility for certin ppliction cn e derived from our informtion. he informtion given does not relese the user from the oligtion of own judgment nd verifiction. It must e rememered tht our products re suject to nturl process of wer nd ging.