Axial Piston Variable Pump A1V()O (U-Version) RA-A 9271/3.12 1/52 Replaces: 12.9 Data sheet eries 31 ize NG18 ((A)A1VO) ize NG28 to 14 (A1VO) Nominal pressure 4 psi (28 bar) Maximum pressure 51 psi (35 bar) Open circuit Position Foto (oben links): = 153 Y = 93,9 Contents Type code for standard program 2 Technical data 4 DG Two-point control, directly operated 1 DR Pressure control 11 DRG Pressure control, remotely operated 12 DFR/DFR1 Pressure and flow control 13 DFR Pressure, flow and power control 14 ED Electro-hydraulic pressure control 15 ER Electro-hydraulic pressure control 16 Dimensions size 18 to 14 18 Dimensions through drive 42 ummary mounting options 45 Combination pumps A1VO + A1VO 46 Connector for solenoids 47 Installation instructions 48 General instructions 52 Features Variable pump in axial piston swashplate design for hydrostatic drives in an open circuit The flow is proportional to the drive speed and the displacement. The flow can be steplessly varied by adjustment of the swashplate angle. 2 case drain ports Excellent suction characteristics ow noise level ong service life Favorable power/weight ratio Versatile controller range hort control time The through drive is suitable for adding gear pumps and axial piston pumps up to the same size, i.e., 1% through drive.
2/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Type code for standard program O / 31 V 1 2 3 4 5 6 7 8 9 1 11 12 13 Version 18 28 45 71 1 14 tandard version (without symbol) 1 High-speed version H Axial piston unit washplate design, variable, nominal pressure 4 psi (28 bar), 2 maximum pressure 51 psi (35 bar) A1V A1V Operation mode 3 Pump, open circuit O ize (NG) 4 Geometric displacement, see table of values on pages 6 and 7 18 28 45 71 1 14 Control device Two-point control, directly operated DG Pressure control DR with flow control, hydraulic -T open DFR 5 -T closed DFR1 with flow and differential pressure control, electrically variable EF with pressure cut-off, remotely operated hydraulic DRG electrical negative characteristic 12V ED71 24V ED72 positive characteristic 12V ER71 2) 24V ER72 2) Pressure, flow and power control DFR eries 6 eries 3, Index 1 31 Direction of rotation Viewed on drive shaft clockwise R 7 counter clockwise eals 8 FKM (fluor-caoutchouc) V 2) ee RE 9279 The following must be taken into account during project planning: Excessive current levels (I > 12 ma with 12 V or I > 6 ma with 24 V) to the ER solenoid can result in undesired increase of pressure which can lead to pump or system damage: - Use I max current limiter solenoids. - A sandwich plate pressure reducing valve can be used to protect the pump in the event of overflow. An accessory kit with sandwich plate pressure reducing valve can be ordered from Rexroth under part number R9249825. = available = on request = not available
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 3/52 Type code for standard program O / 31 V 1 2 3 4 5 6 7 8 9 1 11 12 13 Drive shaft 18 28 45 71 1 14 plined shaft standard shaft ANI 92.1a similar to shaft "" however for higher input torque R 9 reduced diameter, not for through drive U same as "U", higher torque; not for through drive W Mounting flange 18 28 45 71 1 14 IO 319-1 (AE) 2-hole C 1 4-hole D 2) 11 12 ervice line port 18 28 45 71 1 14 AE flange ports at rear, UNC fastening thread, not for through drive 61 91 AE flange ports on opposite side, UNC fastening thread 62 92 Through drive 18 28 45 71 1 14 without through drive N Flange IO 319-1 (AE) coupling for splined shaft Diameter diameter 82-2 (A) 5/8 in 9T 16/32DP K1 3/4 in 11T 16/32DP K52 11-2 () 7/8 in 13T 16/32DP K68 1 in 15T 16/32DP K4 127-2 (C) 1 1/4 in 14T 12/24DP K7 1 1/2 in 17T 12/24DP K24 152-4 (D) 1 3/4 in 13T 8/16DP K17 Connectors for solenoids 2) 18 28 45 71 1 14 13 DEUTCH - molded connector, 2-pin without suppressor diode P Coupling for splined shaft as per ANI 92.1a Connectors for other electric components can deviate. = available = on request = not available
4/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Technical data Hydraulic fluid efore starting project planning, please refer to our data sheets RE 922 (mineral oil), RE 9221 (environmentally acceptable hydraulic fluids) and RE 9222 (HFD hydraulic fluids) for detailed information regarding the choice of hydraulic fluid and application conditions. If environmentally acceptable hydraulic fluids are being used, the limitations regarding technical data and other seals must be observed. Please contact us. Operating viscosity range For optimum efficiency and service life we recommend that the operating viscosity (at operating temperature) be selected in the range opt = opt. operating viscosity 8-17 U (16... 36 mm 2 /s) referred to reservoir temperature (open circuit). imits of viscosity range For critical operating conditions the following values apply: n min = 6 U (1 mm 2 /s) short-term (t 1 min) at max perm. case drain temperature of 239 F (115 C). Please also ensure that the max. case drain temperature of 239 F (115 C) is not exceeded in localized areas (for instance, in the bearing area). The fluid temperature in the bearing area is approx. 7 F (5 K) higher than the average case drain temperature. n max = 75 U (16 mm 2 /s) short-term (t 1 min) on cold start (p 435 psi (3 bar), n 1 rpm, t min -13 F (-25 C)) Depending on the installation situation, special measures are necessary at temperatures between -4 F (-4 C) and -13 F (-25 C). Please contact us. For detailed information on operation with low temperatures see data sheet RE 93-3-. election diagram Viscosity [mm2/s] 74 46 3 2 1 5 3 2 1 8 6 2 1 6 4 2 1-4 -4 32 68 14 14 176 212 F -4-2 2 4 6 8 1 C 16 16 74 1 6 4 VG 68 VG 46 VG 32 VG 22 VG 1 36 16 17 opt 8 Notes on the choice of hydraulic fluid In order to select the correct hydraulic fluid, it is necessary to know the operating temperature in the reservoir (open circuit) in relation to the ambient temperature. The hydraulic fluid should be selected so that within the operating temperature range, the viscosity lies within the optimum range ( opt ), see shaded section of the selection diagram. We recommend to select the higher viscosity grade in each case. Example: at an ambient temperature of F ( C) the operating temperature is 14 F (6 C). In the optimum operating viscosity range ( opt ; shaded area) this corresponds to viscosity grades VG 46 resp. VG 68; VG 68 should be selected. Important: The case drain temperature is influenced by pressure and input speed and is always higher than the reservoir temperature. However, at no point in the component may the temperature exceed 239 F (115 C). The temperature difference specified on the left is to be taken into account when determining the viscosity in the bearing. If the above conditions cannot be met, due to extreme operating parameters please contact us. Filtration of the hydraulic fluid The finer the filtration the better the cleanliness level of the hydraulic fluid and the longer the service life of the axial piston unit. In order to guarantee the functional reliability of the axial piston unit it is necessary to carry out a gravimetric evaluation of the hydraulic fluid to determine the particle contamination and the cleanliness level according to IO 446. A cleanliness level of at least 2/18/15 must be maintained. At very high hydraulic fluid temperatures (195 F (9 C) to maximum 239 F (115 C)), a cleanliness level of at least 19/17/14 according to IO 446 is necessary. If the above cleanliness levels cannot be maintained, please contact us. U mm 2 /s mm 2 /s 42 5 5-4 -25 1 1 3 5 7 9 115 C t min = -4 F (-4 C) -4-13 14 32 5 86 122 158 194 24 F Temperature t in C Fluid temperature range U 42 t max = 24 F (115 C)
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 5/52 Technical data Operating pressure range (when using mineral oil) Pressure at service line port Nominal pressure p nom 4 psi (28 bar) absolute Maximum pressure p max 51 psi (35 bar) absolute ingle operating period 2. ms Total operating period 3 h Minimum pressure (high-pressure side) 145 psi (1 bar) absolute Rate of pressure change R A max _ 2326 psi/s (16 bar/s) Pressure p p nom p t Definition Nominal pressure p nom The nominal pressure corresponds to the maximum design pressure. Maximum pressure p max The maximum pressure corresponds to the maximum operating pressure within the single operating period. The total of the single operating periods must not exceed the total operating period. Minimum pressure (high-pressure side) Minimum pressure in the high-pressure side (port ) that is required in order to prevent damage to the axial piston unit. The minimum pressure depends on the speed and displacement of the axial piston unit. Rate of pressure change R A Maximum permissible pressure build-up and pressure reduction speed with a pressure change over the entire pressure range. Time t Pressure at suction port (inlet) Minimum pressure p min 12 psi (.8 bar) absolute Maximum pressure p max 145 psi (1 bar) absolute Note Please contact us for values for other hydraulic fluids. Pressure p ingle operating period Maximum pressure p max Nominal pressure p nom t 1 t 2 t n Case drain pressure Maximum permissible case drain pressure (at port, 1 ): Maximum.5 bar higher than the inlet pressure at port, however not higher than 2 bar absolute. p max abs 3 psi (2 bar) absolute Other values on request Minimum pressure (high-pressure side) Total operating period = t 1 + t 2 +... + t n Time t
6/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Technical data, standard unit Table of values (theoretical values, without efficiencies and tolerances: values rounded) ize NG 18 28 45 71 1 14 Geometrical displacement per revolution Maximum speed V g max in 3 (cm 3 ) 1.1 (18) 1.71 (28) 2.75 (45) 4.33 (7 6.1 ( 8.54 (14) at V g max n nom rpm 33 3 26 22 2 18 at V g < V g max n max perm rpm 39 36 31 26 24 21 Flow at n nom and V g max q v max gpm (l/min) 15.7 (59) 22 (84) 31 (117) 41 (156) 53 (2) 67 (252) at n E = 18 rpm and V g max q ve max gpm (l/min) 8.5 (32) 13.3 (5) 21.4 (8 33.8 (128) 47.6 (18) 67 (252) Power at p = 4 psi (28 bar) Torque at n nom, V g max P max HP (kw) 4 (3) 51 (39) 74 (55) 96 (73) 124 (93) 156 (118) at n E = 18 rpm and V g max P E max HP (kw) 19 (15) 31 (24) 5 (38) 79 (69) 111 (84) 156 (118) at V g max and Rotary stiffness, drive shaft p = 4 psi p = (28 bar) p = 145 psi p = (1 bar) R U W T max lb-ft (Nm) 58 (8) 91 (125) 146 (2) 23 (316) 324 (445) 453 (623) T lb-ft (Nm) 14.6 (3) 33 (45) 53 (72) 83 (113) 117 (159) 164 (223) c c c c lb-ft/rad (Nm/rad) lb-ft/rad (Nm/rad) lb-ft/rad (Nm/rad) lb-ft/rad (Nm/rad) Moment of inertial rotary group J TW lbs-ft 2 (kgm 2 ) 882 (1187) 187 (1485) 5946 (89) ( ).22 (.93) 164 (22317) 194 (2636) 1231 (16695) 1467 (19898).43 (.17) 2756 (375) 3241 (4125) 2217 (377) 2533 (34463).783 (.33) 5318 (71884) 56456 (76545) 3892 (52779) 4236 (5746).197 (.83) 89348 (121142) ( ) 6718 (9193) 74858 (11847).3963 (.167) Angular acceleration, maximum 2) rad/s 2 68 55 4 33 27 27 12542 (169537) ( ) ( ) ( ).5743 (.242) Filling capacity V gal ().1 (.4).2 (.7).26 (1.).4 (1.6).6 (2.2).8 (3.) Weight (without through drive) approx. m lbs (kg) 26.5 (12) 33 (15) 46 (2 73 (33) 99 (45) 132 (6) 2) The values are applicable: - for an absolute pressure p abs = 15 psi (1 bar) at suction port - within the optimum viscosity range from opt = 8 to 17 U (16 to 36 mm 2 /s) - for mineral-oil based hydraulic fluid. The scope of application lies between the minimum necessary and the maximum permissible drive speeds. Valid for external excitation (e.g. diesel engine 2- to 8-fold rotary frequency, cardan shaft 2-fold rotary frequency). The limiting value is only valid for a single pump. The loading capacity of the connecting parts must be taken into account. Note Exceeding the maximum or falling below the minimum permissible values can lead to a loss of function, a reduction in operational service life or total destruction of the axial piston unit. We recommend to check the loading through tests or calculation / simulation and comparison with the permissible values. Calculation of characteristics Flow q V = V g V [gpm V g = Displacement per revolution in cm 3 231 ( (l/min)] p = Pressure differential in bar Torque T = V g p [lb-ft n = peed in rpm mh (Nm)] V = Volumetric efficiency Power P = 2 = q V p [HP mh = Mechanical-hydraulic efficiency 33 (6) t (kw)] t = Total efficiency (h t = h V h mh )
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 7/52 Technical data, high-speed version Table of values (theoretical values, without efficiencies and tolerances: values rounded) ize NG 45 71 1 14 Geometrical displacement per revolution Maximum speed V g max in 3 (cm 3 ) 2.75 (45) 4.33 (7 6.1 ( 8.54 (14) at V g max n nom rpm 3 255 23 25 at V g < V g max n max perm rpm 33 28 25 22 Flow at n nom and V g max q v max gpm (l/min) 35 (135) 47 (178) 61 (23) 76 (287) Power at p = 4 psi (28 bar) Torque at n nom, V g max P max HP (kw) 84 (63) 112 (83) 143 (17) 177 (134) at V g max and Rotary stiffness, drive shaft p = 4 psi p = (28 bar) p = 145 psi p = 1 bar R U W T max lb-ft (Nm) 146 (2) 23 (316) 324 (445) 453 (623) T lb-ft (Nm) 53 (72) 83 (113) 117 (159) 164 (223) c c c c lb-ft/rad (Nm/rad) lb-ft/rad (Nm/rad) lb-ft/rad (Nm/rad) lb-ft/rad (Nm/rad) Moment of inertial rotary group J TW lbs-ft 2 ( kgm 2 ) 2756 (375) 324 (4125) 2217 (377) 2533 (34463).783 (.33) 53ß18 (71884) 56456 (76545) ( ) ( ).197 (.83) 89348 (121142) ( ) 6718 (9193) 74858 (11847).3968 (.167) Angular acceleration, maximum 2) rad/s 2 4 33 27 27 12542 (169537) ( ) ( ) ( ).5743 (.242) Filling capacity V gal ().26 (1.).4 (1.6).6 (2.2).8 (3.) Weight (without through drive) approx. m lbs (kg) 46 (2 73 (33) 99 (45) 132 (6) 2) The values are applicable: - for an absolute pressure p abs = 15 psi (1 bar) at suction port - within the optimum viscosity range from opt = 8 to 17 U (16 to 36 mm 2 /s) - for mineral-oil based hydraulic fluid. The scope of application lies between the minimum necessary and the maximum permissible drive speeds. Valid for external excitation (e.g. diesel engine 2- to 8-fold rotary frequency, cardan shaft 2-fold rotary frequency). The limiting value is only valid for a single pump. The loading capacity of the connecting parts must be taken into account. Note Exceeding the maximum or falling below the minimum permissible values can lead to a loss of function, a reduction in operational service life or total destruction of the axial piston unit. We recommend to check the loading through tests or calculation / simulation and comparison with the permissible values. izes 45, 71, 1 and 14 are optionally available in high-speed version. External dimensions are not affected by this option.
8/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Technical data Permissible radial and axial loading on the drive shaft ize NG 18 28 45 71 1 14 Radial force maximum at a/2 Axial force maximum Fq a/2 a/2 a F q max lbf (N) 8 (35) 27 (12) 34 (15) 427 (19) 517 (23) 63 (28) Fax + F ax max lbf (N) 157 (7) 225 ( 34 (15) 54 (24) 9 (4) 18 (48) Permissible input and through-drive torques ize NG 18 28 45 71 1 14 Torque at V g max and p = 4 psi (28 bar ) 2) Input torque for drive shaft, maximum 2) T max lb-ft (Nm) T E max lb-ft (Nm) R T E max lb-ft (Nm) U T E max lb-ft (Nm) W T E max lb-ft (Nm) Maximum through-drive torque for drive shaft T D max lb-ft (Nm) R T D max Nm Without considering efficiency For drive shafts free of radial force Distribution of torques 58 (8) 92 (124) 91 (125) 146 (198) 146 (2) 235 (319) 23 (316) 462 (626) 324 (445) 814 (114) 453 (623) 1195 (162) Ø in 3/4 7/8 1 1 1/4 1 1/2 1 3/4 118 (16) 184 (25) 295 (4) 475 (644) ( ) Ø in 3/4 7/8 1 1 1/4 44 (59) 77 (15) 139 (188) 221 (3) 439 (595) Ø in 5/8 3/4 7/8 1 1 1/4 ( ) 13 (14) 162 (22) 291 (394) 469 (636) Ø in 3/4 7/8 1 1 1/4 T 1 T 2 8 (18) 89 (12) 118 (16) 13 (176) 235 (319) 269 (365) 363 (492) 44 (548) 574 (778) ( ) ( ) ( ) ( ) 934 (1266) ( ) T E 1. Pumpe 1st pump 2. 2nd Pumpe pump T D
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 9/52 Technical data Drive power and flow Operating material: Hydraulic fluid IO VG 46 DIN 51519, t = 122 F (5 C) ize 18 n = 18 rpm n = 33 rpm Flow qv (/min) gpm (8) (6) (4) (2) 2 1 ize 28 5 1 15 2 25 3 35 4psi (5) q v n = 18 rpm n = 3 rpm Flow qv (/min) gpm (8) (6) (4) (2) ize 45 2 1 q v (5) n = 18 rpm n = 26 rpm Flow qv (/min) gpm (12) 3 ( (8) (6) (4) (2) 2 1 ( (15) (2) Pqv max Operating pressure ( (15) P qv zero (2) P qv zero P qv max (kw) HP (4) (3) (2) ( (25) (28)(bar) (kw) HP 6 (4) (3) (2) ( 5 1 15 2 25 3 35 4psi (5) q v Operating pressure ( (15) (2) P qv zero (25)(28)(bar) P qv max (4) (3) (2) ( 5 1 15 2 253 35 4psi Operating pressure 4 2 (kw) HP (6) 8 (5) (25)(28)(bar) 6 4 2 4 2 Drive power P Drive power P Drive power P ize 1 n = 18 rpm n = 2 rpm Flow qv (/min) gpm (2) 5 (18) (16) (14) (12) ( (8) (6) (4) (2) ize 14 4 3 2 1 5 1 15 2 253 35 4psi (5) q v n = 18 rpm Flow qv (/min) gpm (26) (24) (22) (2) (18) (16) (14) (12) ( (8) (6) (4) (2) 6 5 4 3 2 1 (5) P qv max ( (15) (2) Operating pressure q v P qv max ( (15) P qv zero (2) P qv zero (kw) ( (9) (8) (7) (6) (5) (4) (3) (2) ( (25)(28)(bar) 5 1 15 2 253 35 4psi Operating pressure (kw) (13) (9) (8) (7) (6) (5) (4) (3) (2) ( (25)(28)(bar) HP 12 1 8 6 4 2 HP (12) 16 (1 14 ( 12 1 8 6 4 2 Drive power P Drive power P ize 71 n = 18 rpm n = 22 rpm (/min) gpm (16) 4 (14) q v (kw) (8) (7) HP 1 Flow qv (12) ( (8) (6) (4) (2) 3 2 1 P qv max P qv zero (6) (5) (4) (3) (2) ( 8 6 4 2 Drive power P 5 1 15 2 253 35 4psi (5) ( (15) (2) Operating pressure (25)(28)(bar)
1/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 DG Two-point control, directly operated The variable pump can be set to a minimum swivel angle by connecting an external control pressure to port. Circuit diagram This will supply control fluid directly to the stroke piston; a minimum control pressure of p st 725 psi (5 bar) is required. The variable pump can only be switched between V g max or V g min. Please note, that the required control pressure at port is directly dependent on the actual operating pressure p in port. (ee control pressure characteristic). Control pressure p st in = psi ( bar) V g max Control pressure p st in 725 psi (5 bar) V g min Control pressure characteristic psi (bar) 172 (12) 1455 ( Req. control pressure pst 725 (5) psi 72512 24 36 4 (bar) (5)(7) (14) (2 (28) Operating pressure p 1 Port for ervice line uction line, 1 Case drain ( 1 plugged) Pilot pressure
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 11/52 DR Pressure control The pressure control limits the maximum pressure at the pump output within the pump control range. The variable pump only supplies as much hydraulic fluid as is required by the consumers. If the operating pressure exceeds the pressure setpoint set at the integrated pressure valve, the pump will adjust towards a smaller displacement and the control deviation will be reduced. The pressure can be set steplessly at the control valve. tatic characteristic (at n 1 = 18 rpm; t fluid = 122 F (5 C)) Circuit diagram, sizes 18 to 1 psi (bar) 4 (28) Operating pressure p etting range Hysteresis / pressure rise pmax 1 Circuit diagram, size 14 365 (25) Flow q v [gal (l/min)] In order to prevent damage to the pump and the system, this setting range is the permissible setting range and must not be exceeded. The range of possible settings at the valve are greater. Port for ervice line uction line, 1 Case drain ( 1 plugged) Control data Hysteresis and repeatability p maximum 45 psi (3 bar) Pressure rise, maximum NG 18 28 45 71 1 14 p psi (bar) 6 (4) 6 (4) 9 (6) 115 (8) 145 ( 175 (12) Control fluid consumption max. approx..8 gpm (3 l/min) Flow losses at q Vmax see page 9.
12/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 DRG Pressure control, remotely operated The DR-control valve (see page 1 is overriding this DRGremote setting of max. outlet pressure. A pressure relief valve can be externally piped to port for remote setting of pressure below the setting of the DR control valve spool. This relief valve is not included in the delivery contents of the DRG control. The differential pressure at the DRG control valve is set as standard to 29 psi (2 bar). This results in a pilot oil flow to the relief valve of approx..4 gpm (1.5 l/min) at port. If another setting is required (range from 145-32 psi (1-22 bar)) please state in clear text. As a separate pressure relief valve we can recommend: DDH 6 (hydraulic) to RE 2542 or DETR-O 381 with orifice dia.3 inch (Ø.8 mm) in P (electric) to RE 29166. The max. length of piping should not exceed 6.5 ft (2 m). Circuit diagram, sizes 18 to 1 Not included in the delivery contents tatic characteristic (at n 1 = 18 rpm; t fluid = 122 F (5 C)) psi (bar) 4 (28) Operating pressure p etting range Hysteresis / pressure rise pmax 1 Circuit diagram, size 14 Not included in the delivery contents 29 (2) Flow q v [gpm (l/min)] In order to prevent damage to the pump and the system, this setting range is the permissible setting range and must not be exceeded. The range of possible settings at the valve are greater. Port for ervice line uction line, 1 Case drain ( 1 plugged) NG 18 to 1 with adapter NG 14 without adapter Pilot pressure Pilot pressure Control data Hysteresis and repeatability p maximum 45 psi (3 bar) Pressure rise, maximum NG 18 28 45 71 1 14 p psi (bar) 6 (4) 6 (4) 9 (6) 115 (8) 145 ( 175 (12) Control fluid consumption max. approx. 1.2 gpm (4.5 l/min) Flow losses at q Vmax see page 9.
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 13/52 DFR/DFR1 Pressure and flow control In addition to the pressure control function (see page 1, the pump flow may be varied by means of a differential pressure over an adjustable orifice (e.g. directional valve) installed in the service line to the actuator. The pump flow is equal to the actual required flow by the actuator, regardless of changing pressure levels. The pressure control overrides the flow control function. Note The DFR1 version has no connection between and the reservoir. Unloading the -pilot line must be possible in the valve system. ecause of the flushing function sufficient unloading of the -line must also be provided. tatic characteristic Flow control at n 1 = 18 rpm; t fluid = 122 F (5 C)) Operating pressure p In order to prevent damage to the pump and the system, this setting range is the permissible setting range and must not be exceeded. The range of possible settings at the valve are greater. tatic characteristic at variable speed Flow qv [gpm (l/min)] psi (bar) 4 (28) 365 etting range (25) Differential pressure p Flow q v [gpm (l/min)] peed n [rpm] Hysteresis / pressure rise pmax Hysteresis / pressure rise p max tandard setting: 2 to 32 psi (14 to 22 bar). If another setting is required, please state in clear text. Relieving the load on port to the reservoir results in a zero stroke ("standby") pressure which lies about 15 to 3 psi (1 to 2 bar) higher than the differential pressure p. ystem influences are not taken into account. Circuit diagram, sizes 18 to 1 Circuit diagram, size 14 With DFR1 plugged Port for ervice line uction line, 1 Case drain ( 1 plugged) Control data Pilot pressure Data for pressure control DR, see page 11. Maximum flow deviation measured with drive speed n = 15 rpm. NG 18 28 45 71 1 14 q v max gpm (l/min) 1.24 (.9) With DFR1 plugged.26 (1.).48 (1.8).75 (2.8) 1.6 (4.) 1.6 (6.) Control fluid consumption DFR max. approx..8 to 1.2 gpm (3 to 4.5 l/min) Control fluid consumption DFR1 maximum approx..8 gpm (3 l/min) Volume flow loss at q Vmax, see page 9. Not included in the delivery contents Not included in the delivery contents
14/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 DFR Pressure, flow and power control Execution of the pressure control like DR(G), see page 11 (12). Execution of the flow control like DFR, DFR1, see page 13. In order to achieve a constant drive torque with varying operating pressures, the swivel angle and with it the output flow from the axial piston pump is varied so that the product of flow and pressure remains constant. Flow control is possible below the power control curve. The power characteristic is set in the factory; when ordering, please state in clear text, e.g. 4 HP (3 kw) at 18 rpm. tatic curves and torque characteristic Operating pressure p psi (bar) 435 (3) 4 (28) 36 (25) 29 (2) 22 (15) 145 ( 725 (5) Maximum power curve Maximum power curve Control data For pressure control DR data, see page 11. For flow control FR data, see page 13. Circuit diagram, sizes 28 to 1 Not included in the delivery contents () Torque T [lb-ft (Nm)] qv (see table on page 13) 1 Circuit diagram, size 14 Not included in the delivery contents Control data eginning of control 725 psi (5 bar) Control fluid consumption _ maxi. approx. 1.45 gpm (5.5 l/min) Flow loss at qv max, see page 9. 1 Volume flow q v [%] Port for ervice line uction line, 1 Case drain ( 1 plugged) Pilot pressure 1
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 15/52 ED Electro-hydraulic pressure control The ED valve is set to a certain pressure by a specified, variable solenoid current. If there is a change at the consumer (load pressure), the position of the control piston changes. This causes an increase or decrease in the pump swivel angle (flow) in order to maintain the electrically set pressure level. The pump thus only delivers as much hydraulic fluid as the consumers can take. The desired pressure level can be set steplessly by varying the solenoid current. When the solenoid current signal drops towards a zero value, the maximum output pressure is limited to p max by an adjustable hydraulic pressure cut-off (secure fail safe function in case of a loss of power e.g. for use as fan drives). The response time characteristic of the ED-control was optimized for the use as a fan drive system. When ordering, state the type of application in clear text. Influence of pressure setting on standby level tandby psi (bar) 435 (3) 45 (28) 36 (26) 35 (24) 32 (22) 29 (2) 26 (18) 23 (16) 2 (14) (bar) psi (12) (14) (16) (18) (2) (22) (24) (26) (28) 175 2 235 27 29 32 35 37 4 Circuit diagram ED.. Maximum pressure setting tatic current-pressure characteristic ED (measured at pump in zero stroke negative characteristic) Operating pressure psi (bar) 4 (28) 25 (14) ED De-activation of control Max. adjustable control pressure () Min. adjustable control pressure Amperage I/ 1 Imax Hysteresis of the static current-pressure characteristic < 45 psi (3 bar) 1 tatic flow-pressure characteristic (at n= 18 rpm; t fluid = 122 F (5 C)) psi (bar) max 4 (28) Operating pressure p 25 etting range (14) min min Flow q v [gpm (l/min)] Control data tandby standard settings (see diagram at right), other values on request. max Hysteresis / pressure rise p Hysteresis and pressure increase p < 6 psi (4 bar) Control fluid consumption.8 to 1.2 gpm (3 to 4.5 l/min) Port for ervice line uction line, 1 Case drain ( 1 plugged) Technical data, solenoid ED71 ED72 Voltage 12 V (±2 %) 24 V (±2 %) Control current tart of control at V g min 1 ma 5 ma End of control at V g max 12 ma 6 ma imiting current 1.54 A.77 A Nominal resistance (at 2 C) 5.5 Dither frequency 1 to 2 Hz 22.7 1 to 2 Hz Actuated time 1 % 1 % For type of protection, see plug design on page 47 For details on the control electronics, see page 16 Operating temperature range at valve -4 F to 239 F (-2 C to +115 C)
16/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 ER Electro-hydraulic pressure control The ER valve is set to a specific pressure by a specified, variable solenoid current. If there is a change at the consumer (load pressure), the position of the control piston changes. This causes an increase or decrease in the pump swivel angle (flow) in order to maintain the electrically set pressure level. The pump thus only delivers as much hydraulic fluid as the consumers can take. The desired pressure level can be set steplessly by varying the solenoid current. If the solenoid current drops to zero, the pressure is limited to p min (stand-by). Observe the project planning note on page 2. Circuit diagram ER.. tatic current-pressure characteristic ER (measured at pump in zero stroke positive characteristic) psi (bar) 51 (35) 4 (28) Operating pressure 36 22 725 (25) (15) Max. adjustable control pressure Min. (5) adjustable control pressure () 1 Amperage I/I max Port for ervice line uction line, 1 Case drain ( 1 plugged) 1 Hysteresis of the static current-pressure characteristic < 45 psi (3 bar) Influence of pressure setting on stand-by ±3 psi (±2 bar) tatic flow-pressure characteristic (at n= 18 rpm; t fluid = 122 F (5 C)) Operating pressure p psi 4 25 (bar) max (28) etting range (14) min min Flow q v max Hysteresis / pressure rise p Control data tandby standard setting 29 psi (2 bar), other values on request. Hysteresis and pressure increase p < 6 psi (4 bar) Control fluid consumption.8 to 1.2 gpm (3 to 4.5 l/min) Technical data, solenoid ER71 ER72 Voltage 12 V (±2 %) 24 V (±2 %) Control current tart of control at V g min 1 ma 5 ma End of control at V g max 12 ma 6 ma imiting current 1.54 A.77 A Nominal resistance (at 2 C) 5.5 Dither frequency 1 to 2 Hz 22.7 1 to 2 Hz Actuated time 1 % 1 % For type of protection, see plug design on page 47 Operating temperature range at valve -4 F to 239 F (-2 C to +115 C) The following electric controllers and amplifiers are available for controlling the proportional solenoids: Analog amplifier RA RE 9523 Digital controller RC2-2/21 RE 9521 Analog amplifier VT2 2) RE 2994 Analog amplifier VT 1129/113 2) RE 29741 2) Power outlets for 2 valves, can be actuated separately Only 24V nominal voltage
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 17/52 Notes
18/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Dimensions size 18 DFR, DFR1 Pressure and flow control, hydraulic Clockwise rotation efore finalizing your design request a certified V counter-clockwise rotation Flange IO 319-1 3.25 3.2479 DIA (Ø82.55 ).25 (6.3) -.54 5.8 (129) 3.27 (83) 2.48 (63) 2.48 (63).43 (1 45 45 2.6 (66) 1.57 (4) max. 4.33 (1 2.52 (64) 2.72 (69).45 (11.5) 1.69 (43) 1 5.71 (145) 7.68 (195) 4.19 (16.4) 5.98 (152) 4.29 (19) 4.96 (126) W View V View W.87 (22.2) DIA.79 (Ø2) 1.87 (47.6) 2.6 (52.4) DIA.98 (Ø25) 1.3 (26.2) Ports Designation Port for tandard ize Max. press. [psi /(bar)] 2) ervice line, fastening thread uction line, fastening thread AE J518 AME 1.1 AE J518 AME 1.1 3/4 in 3/8-16 UNC-2;.79 (2) deep 1 in 3/8-16 UNC-2;.79 (2) deep 51 (35) O 145 psi ( O Case drain fluid IO 11926 3) 9/16-18UNF-2;.47 (12) deep 3 (2) O 4) 1 Case drain fluid IO 11926 3) 9/16-18UNF-2;.47 (12) deep 3 (2) 4) Pilot pressure IO 11926 3) 7/16-2UNF-2;.45 (11.5) deep 51 (35) O Pilot pressure with DG-control DIN IO 228 3) G 1/4 in;.47 (12) deep 51 (35) O For the maximum tightening torques the general instructions on page 52 must be observed. 2) Depending on the application, short-term pressure spikes can occur. Consider this when selecting measuring equipment and fittings. Pressure values in psi (bar) absolute 3) The spot face can be deeper than as specified in the standard 4) Depending on the installation position, or 1 must be connected (see also installation instructions on pages 48, 49) O = Must be connected (plugged on delivery) = Plugged (in normal operation) tate
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 19/52 Dimensions size 18 Drive shaft plined shaft 3/4 in 11T 16/32DP (AE J744) R plined shaft 3/4 in 11T 16/32DP 2) (AE J744) U efore finalizing your design request a certified plined shaft 5/8 in 9T 16/32DP 2) (AE J744) 3) 4) 1/4-2UNC-2 1.18 (3).55 (14).2 (5) 3) 4) 1/4-2UNC-2.55 (14).2 (5).94 (23.8).83 (2 1.5 (38) Usable shaft length.83 (2 1.5 (38) Centering 5) R.12 x.26 (R 3.15 x 6.7) DIN 332.62 (15.8) 1.25 (31.8) 2) 3) 4) 5) ANI 92.1a, 3 pressure angle, flat root, side fit, tolerance class 5 plines according to ANI 92.1a, run out of spline is a deviation from standard Thread according to AME 1.1 For the maximum tightening torques the general instructions on page 52 must be observed Coupling axially secured, e.g. with a clamp coupling or radially mounted clamping screw
2/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Dimensions size 18 DG Two-point control, directly operated DR Pressure control efore finalizing your design request a certified 5.83 (148) max. 4.33 (1 3.5 (89) 3.82 (97).12 (3) 1. (25 +.4 ).98 4.96 (126) DRG Pressure control, remotely operated ED7., ER7. Electro-hydraulic pressure control 7.24 (184) 5.8 (129) 1.57 (4) max. 4.33 (1 5.51 (14) 4.29 (19) 4.96 (126) 4.96 (126) ER7.: 6.34 in (161 mm) if using a sandwich plate pressure reducing valve.
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 21/52 Dimensions size 28 DFR/DFR1 Pressure and flow control, hydraulic Clockwise rotation efore finalizing your design request a certified Flange IO 319-1 4. 3.9979 DIA.37 (9.5).25 (6.3) (Ø11.6 -.54 ) Port plate 62 5.47 (139) 3.54 (9) V 3.15 (8) 3.15 (8) 2.91 (74) DIA 55 (14) 45 45 6.85 (Ø174) 1.57 (4) max. 4.33 (1 2.91 (74).55 (14) 1.57 (4) 1 6.46 (164) 7.64 (194) W 5.75 (146) 6.46 (164) 3.29 (83.5) 4.68 (119) 5.35 (136) Detail V Detail W.87 (22.2) Flange IO 319-1 4. 3.9979 DIA (Ø11.6 -.54 ).55 (14) 1.57 (4) Port plate 61.37 (9.5) 3.54 (9).25 (6.3) 1 6.69 (17) 8.23 (29) 8.9 (226) DIA.79 (Ø2) 1.87 (47.6) 1.69 (43) max. 4.45 (113) 3.11 (79) Z 2.31 (58.7) 1.26 (Ø32) 1.19 (3.2) View Z 2.87 (73) 1.87 (47.6).79 (Ø2) DIA 1.25 (Ø32) 2.31 (58.7).87 (22.2) 1.19 (3.2) 1.77 (45) 1.77 (45) Details on connection options and shaft ends can be found on page 22
22/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Dimensions size 28 Drive shaft plined shaft 7/8 in 13T 16/32DP (AE J744) R plined shaft 7/8 in 13T 16/32DP 2) (AE J744) U efore finalizing your design request a certified plined shaft 3/4 in 11T 16/32DP (AE J744) 3) 4) 1/4-2UNC-2 1.3 (33..63 (16).2 (5) 3) 4) 1/4-2UNC-2.63 (16).2 (5) 3) 4) 1/4-2UNC-2 1.18 (3).55 (14).2 (5).99 (25. Usable shaft length.98 (25) 1.61 (4.87 (22) 1.61 (4 1.5 (38) W plined shaft 3/4 in 11T 16/32DP 2) (AE J744) 3) 4) 1/4-2UNC-2.55 (14).2 (5) Usable shaft length.83 (2 1.5 (38) 2) 3) 4) ANI 92.1a, 3 pressure angle, flat root, side fit, tolerance class 5 pline according to ANI 92.1a, run out of spline is a deviation from standard. Thread according to AME 1.1 For the maximum tightening torques the general instructions on page 52 must be observed. Ports Designation Port for tandard ize 5) Max. press. [psi (bar)] 6) ervice line, fastening thread uction line, fastening thread AE J518 AME 1.1 AE J518 AME 1.1 3/4 in 3/8-16 UNC-2;.79 (2) deep 1 1/4 in 7/16-14 UNC-2;.94 (24) deep 51 (35) O 145 ( O Case drain fluid IO 11926 7) 3/4-16 UNF-2;.55 (14) deep 3 (2) O 8) 1 Case drain fluid IO 11926 7) 3/4-16 UNF-2;.55 (14) deep 3 (2) 8) Pilot pressure IO 11926 7) 7/16-14UNC-2;.45 (11.5) deep 51 (35) O Pilot pressure with DG-control DIN IO 228 7) G 1/4in;.47 (12) deep 51 (35) O 5) For the maximum tightening torques the general instructions on page 52 must be observed. 6) Depending on the application, short-term pressure spikes can occur. Consider this when selecting measuring equipment and fittings. Pressure values in psi (bar) absolute. 7) The spot face can be deeper than as specified in the standard. 8) Depending on the installation position, or 1 must be connected (see also installation instructions on pages 48, 49) O = Must be connected (plugged on delivery) = Plugged (in normal operation) tate
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 23/52 Dimensions size 28 DG Two-point control, directly operated, port plate 61 efore finalizing your design request a certified DG Two-point control, directly operated, port plate 62 View Z 6.22 (158).12 (3) DIA +.4 Ø25 1..98 3.11 (79) Z.12 (3) DIA +.4 Ø25 1..98 7.46 (189.5) 7.75 (197) 2.16 (55) 3.92 (99.5) 4.7 (13.5) DR Pressure control, port plate 61 DR Pressure control, port plate 62 View Z max. 4.45 (113) Z max. 4.33 (1 8.9 (226) 5.35 (136) DRG Pressure control, remotely operated, port plate 61 View Z DRG Pressure control, remotely operated, port plate 62 1.69 (43) max. 4.45 (113) Z 2.91 (74) 5.8 (129) 1.57 (4) max. 4.33 (1 8.23 (29) 8.9 (226) For details of connection options and drive shafts, see also pages 21 and 22 4.69 (119) 5.35 (136)
24/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Dimensions size 28 DFR Pressure, flow and power control, port plate 61 1.89 (48) View Z see page 21 1.93 (49) efore finalizing your design request a certified DFR Pressure, flow and power control, port plate 62 7.79 (198) 3.39 (86) 8.9 (226) max. 4.45 (113) 4.69 (119) 1.57 (4) 4.69 (119) 5.35 (136) max.4.33 (1 ED7. / ER7. Electro-hydraulic pressure control, port plate 61 View Z ED7. / ER7. Electro-hydraulic pressure control, port plate 62 6.21 (157.8) 1.4 (35.6) 5.63 (143) 5.51 (14) Z 8.86 (225) 5.35 (136) 2) ER7.: 1.24 in (26 mm) when using a sandwich plate pressure reducing valve. 2) ER7.: 6.83 in (17.9 mm) when using a sandwich plate pressure reducing valve. For details of connection options and drive shafts, see also pages 21 and 22
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 25/52 Dimensions size 45 DFR/DFR1 Pressure and flow control, hydraulic Clockwise rotation Port plate 62 Valve mounting for efore finalizing your design request a certified.37 (9.5).25 (6.3) Flange IO 319-1 4. 3.9979 DIA (Ø11.6 ) -.54 6.6 (154) 3.78 (96) V 3.54 (9) 3.54 (9) 3.27 (83) DIA.55 (Ø14) 45 45 1.57 (4) max. 4.33 (1 3.17 (8.5).56 (14.3) 1.77 (45) 1 7.24 (184) 8.62 (219) W 5.75 (146) 7.24 (184) 3.68 (93.5) 5.8 (129) 5.75 (146) Detail V View W 1.3 (26.2) DIA.98 (Ø25) 2.6 (52.4) 2.75 (69.9) DIA 1.57 (Ø4) 1.4 (35.7).37 (9.5).25 (6.3) Port plate 61 8.98 (228) 3.78 (96) View Z 3.23 (82) 2.6 (52.4) DIA.98 (Ø25) 1.3 (26.2) 4. 3.9979 DIA (Ø11.6 ) -.54 Flange IO 319-1.56 (14.3) 1.77 (45) 1 7.44 (189) 9.65 (245) 4 max. 11 88 Z 1.57 (Ø4) 2.75 (69.9) 1.4 (35.7) 1.97 (5) 1.97 (5) Details on connection options and shaft ends can be found on page 26
26/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Dimensions size 45 Drive shaft plined shaft 1 in 15T 16/32DP (AE J744) R plined shaft 1 in 15T 16/32DP 2) (AE J744) U efore finalizing your design request a certified plined shaft 7/8 in 13T 16/32DP (AE J744) 3) 4) 1/4-2UNC-2 1.5 (38).63 (16).2 (5) 3) 4) 1/4-2UNC-2.63 (16).2 (5) 3) 4) 1/4-2UNC-2 1.3 (33..63 (16).2 (5) 1.18 (3) Usable shaft length 1.16 (29.5) 1.81 (45.9).98 (25. 1.81 (45.9) 1.61 (4 W plined shaft 7/8 in 13T 16/32DP 2) (AE J744) 3) 4) 1/4-2UNC-2.63 (16).2 (5) Usable shaft length.98 (25) 1.61 (4 2) 3) 4) ANI 92.1a, 3 pressure angle, flat root, side fit, tolerance class 5 pline according to ANI 92.1a, run out of spline is a deviation from standard. Thread according to AME 1.1 For the maximum tightening torques the general instructions on page 52 must be observed. Ports Designation Port for tandard ize 5) Max. press. [psi (bar)] 6) ervice line, fastening thread uction line, fastening thread AE J518 AME 1.1 AE J518 AME 1.1 1 in 3/8-16 UNC-2;.71 (17) deep 1 1/2 in 1/2-13 UNC-2;.87 (2) deep 51 (35) O 145 ( O Case drain fluid IO 11926 7) 7/8-14 UNF-2;.63 (16) deep 3 (2) O 8) 1 Case drain fluid IO 11926 7) 7/8-14 UNF-2;.63 (16) deep 3 (2) 8) Pilot pressure IO 11926 7) 7/16-2UNF-2;.45 (11.5) deep 51 (35) O Pilot pressure with DG-control DIN IO 228 7) G 1/4 in;.47 (12) deep 51 (35) O 5) For the maximum tightening torques the general instructions on page 52 must be observed. 6) Depending on the application, short-term pressure spikes can occur. Consider this when selecting measuring equipment and fittings. Pressure values in psi (bar) absolute. 7) The spot face can be deeper than as specified in the standard. 8) Depending on the installation position, or 1 must be connected (see also installation instructions on pages 48, 49) O = Must be connected (plugged on delivery) = Plugged (in normal operation) tate
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 27/52 Dimensions size 45 DG Two-point control, directly operated, port plate 61 efore finalizing your design request a certified DG Two-point control, directly operated, port plate 62 View Z 6.81 (173) Z 8.21 (28.5) 8.5 (216).12 (3) DIA 1..98 (Ø25 +.4 ) 2.5 (63.5) 4.33 (1 4.61 (117).12 (3) DIA 1..98 (Ø25 +.4 ) DR Pressure control, port plate 61 DR Pressure control, port plate 62 View Z max. 4.33 (1 Z max. 4.33 (1 9.65 (245) 5.75 (146) DRG Pressure control, remotely operated, port plate 61 DRG Pressure control, remotely operated, port plate 62 View Z 9.65 (245) 8.98 (228) 1.57 (4) max. 4.33 (1 Z 3.23 (82) 6.6 (154) 1.57 (4) max. 4.33 (1 5.8 (129) 5.75 (146) For details of connection options and drive shafts, see pages 25 and 26
28/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Dimensions size 45 DFR Pressure, flow and power control, port plate 61 efore finalizing your design request a certified DFR Pressure, flow and power control, port plate 62 2.13 (54) see page 25 1.93 (49) 8.39 (213) 9.65 (245) 3.58 (9 5.4 (128) max. 4.33 (1 4.41 (112) 1.57 (4) 5.8 (129) 5.75 (146) 4.41 (112) ED7. / ER7. Electro-hydraulic pressure control, port plate 61 9.6 (244) View Z 1.42 (36) Valve mounting for ccw rotation ED7. / ER7. Electro-hydraulic pressure control, port plate 62 1.4 (35.6) 5.51 (14) 5.51 (14) Z 2.5 (63.5) 5.73 (145.5) 2) ER7.: 1.98 in (279 mm) when using a sandwich plate pressure reducing valve 2) ER7.: 7.11 in (18.5 mm) when using a sandwich plate pressure reducing valve. For details of connection options and drive shafts, see also pages 21 and 22
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 29/52 Dimensions size 71 DFR/DFR1 Pressure and flow control, hydraulic Clockwise rotation efore finalizing your design request a certified Port plate 92.5 (12.7) 7.2 (183).24 (6) 4.53 (115) Flange IO 319-1 DIA 5. 4.9975 (Ø127 ) -.63 V 4.9 (14) 4.9 (14) 3.86 (98) DIA 71 (Ø18) 45 45 1.57 (4) 3.62 (92) max. 4.33 (1.71 (18) 2.9 (53) 1 8.54 (217) 1.12 (257) 7.13 (18 8.27 (2 4.23 (17.5) 5.63 (143) 6.3 (16) W DIA.98 (Ø25) 2.6 (52.4) Detail V 1.3 (26.2) 3.6 (77.8) DIA 1.97 (Ø5) Detail W 1.69 (42.9).5 (12.7) 1.31(262) Flange.24 (6) 4.53 (115) IO 319-1 DIA 5. 4.9975 (Ø127 ) -.63 Port plate 91 1.57 (4) max. 4.33 (1 Z 3.62 (92) 1.3 (26.2) DIA 98 (Ø25) 2.6 (52.4) 2.28 (58)2.28 (58).71 (18) 2.9 (53) 1 8.78 (223) 1.98 (279) DIA 1.97 (Ø5) 3.6 (77.8) (1.69 (42.9) Details on connection options and shaft ends can be found on page 3
3/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Dimensions size 71 Drive shaft plined shaft 1 1/4 in 14T 12/24DP (AE J744) R plined shaft 1 1/4 in 14T 12/24DP 2) (AE J744) U efore finalizing your design request a certified plined shaft 1 in 15T 16/32DP (AE J744) 3) 4) 5/16-18UNC-2 1.87 (47.5).75 (19).2 (5) 3) 4) 5/16-18UNC-2.75 (19).2 (5) 3) 4) 1/4-2UNC-2 1.5 (38).63 (16).2 (5) 1.56 (39.5) 2.18 (55.4) Usable shaft length 1.5 (38) 2.18 (55.4) 1.18 (3) 45.9 W plined shaft 1 in 15T 16/32DP 2) (AE J744) 3) 4) 1/4-2UNC-2.63 (16).2 (5) Usable shaft length 1.18 (3) 1.81 (45.9) 2) 3) 4) ANI 92.1a, 3 pressure angle, flat root, side fit, tolerance class 5 pline according to ANI 92.1a, run out of spline is a deviation from standard. Thread according to AME 1.1 For the maximum tightening torques the general instructions on page 52 must be observed. Ports Designation Port for tandard ize 5) Max. press. [psi (bar)] 6) ervice line, fastening thread uction line, fastening thread AE J518 AME 1.1 AE J518 AME 1.1 1 in 3/8-16 UNC-2;.71 (18) deep 2 in 1/2-13 UNC-2;.87 (22) deep 51 (35) O 145 ( O Case drain fluid IO 11926 7) 7/8-14 UNF-2;.63 (16) deep 3 (2) O 8) 1 Case drain fluid IO 11926 7) 7/8-14 UNF-2;.63 (16) deep 3 (2) 8) Pilot pressure IO 11926 7) 7/16-2 UNF-2;.45 (11.5) deep 51 (35) O Pilot pressure with DG-control DIN IO 228 7) G 1/4 in;.47 (12) deep 51 (35) O 5) For the maximum tightening torques the general instructions on page 52 must be observed. 6) Depending on the application, short-term pressure spikes can occur. Consider this when selecting measuring equipment and fittings. Pressure values in psi (bar) absolute. 7) The spot face can be deeper than as specified in the standard. 8) Depending on the installation position, or 1 must be connected (see also installation instructions on pages 48, 49) O = Must be connected (plugged on delivery) = Plugged (in normal operation) tate
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 31/52 Dimensions size 71 DG Two-point control, directly operated, port plate 91 efore finalizing your design request a certified DG Two-point control, directly operated, port plate 92 View Z Z 7.91 (2 (Ø25 +.4 ) 1..98 DIA 9.55 (242.5) 9.84 (25).12 (3) DIA 1..98(Ø25 +.4 ) 2.89 (73.5) 4.86 (123.5) 5.2 (127.5).12 (3) DR Pressure control, port plate 91 DR Pressure control, port plate 92 View Z max. 4.33 (1 Z max 4.33 (1 1.98 (279) DRG Pressure control, remotely operated, port plate 91 View Z 6.3 (16) DRG Pressure control, remotely operated, port plate 92 1.31 (262) 1.98 (279) max. 4.33 (1 3.62 (92) 7.2 (183) 1.57 (4) 5.63 (143) 6.3 (16) 1.57 (4) max 4.33 (1 Details on connection options can be found on pages 29 and 3
32/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Dimensions size 71 DFR Pressure, flow and power control, port plate 91 2.72 (69) 1.98 (279) 4.6 (13) see page 29 1.93 (49) 5.43 (138) max. 4.33 (1 4.88 (124) efore finalizing your design request a certified DFR Pressure, flow and power control, port plate 92 9.53 (242) 1.57 (4) 5.63 (143) 6.28 (159.5) 4.88 (124) ED7. / ER7. Electro-hydraulic pressure control, port plate 91 1.98 (279) View Z 1.42 (36) Valve mounting for ED7. / ER7. Electro-hydraulic pressure control, port plate 92 7.91 (2 1.42 (36) 5.53 (14.5) 5.55 (14 Z 2.89 (73.5) 6.3 (16) 2) ER7.: 12.36 in (314 mm) when using a sandwich plate pressure reducing valve. 2) ER7.: 7.68 in (195 mm) when using a sandwich plate pressure reducing valve. For details of connection options and drive shafts, see also pages 21 and 22
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 33/52 Dimensions size 1 DFR/DFR1 Pressure and flow control, hydraulic Clockwise rotation efore finalizing your design request a certified Flange IO 319-1 5. 4.9975 DIA.5 (12.7).24 (6) (Ø127 -.63 ).79 (2) Port plate 62 9.84 (25) 6.89 (175) 1 3.74 (95) 1.83 (275) 12.48 (317) V 3.94 ( 3.94 (.69 (17.5) 5.98 (152) 4.17 (16) 45 7.13 (18 8.27 (2 4.65 (118) 5.84 (148.4) 6.5 (165) max. 4.33 (1 1.57 (4) 3.74 (95) W Detail V Detail W DIA 1.26 (Ø32) 2.63 (66.7) 1.25 (31.8) 3.5 (88.9) DIA 2.36 (Ø6) 2. (5.8) Flange IO 319-1 5. 4.9975 DIA.5 (12.7) (Ø127 -.63 ).79 (2) Port plate 61 6.89 (175).24 (6) 3.74 (95) 1 11.34 (288) 12.87 (327) 13.54 (344) 4 max. 11 Z 3.9 (99) 2.63 (66.7) DIA 1.26 (Ø32) DIA 2.36 (Ø6) 3.5 (88.9) 1.25 (31.8) 2. (5.8) 2.16 (55) 2.16 (55) Details on connection options and shaft ends can be found on page 34
34/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Dimensions size 1 Drive shaft plined shaft 1 1/2 in 17T 12/24DP (AE J744) U plined shaft 1 1/4 in 14T 12/24DP (AE J744) W efore finalizing your design request a certified plined shaft 1 1/4 in 14T 12/24DP 2) (AE J744) 3) 4) 7/16-14UNC-2 2.13 (54) 1.1 (28).2 (5) 3) 4) 5/16-18UNC-2 1.87 (47.5).75 (19).2 (5) 3) 4) 5/16-18UNC-2.75 (19).2 (5) 1.71 (43.5) 2.44 (61.9) 1.38 (35) 2.18 (55.4) Usable shaft length 1.38 (35) 2.18 (55.4) 2) 3) 4) ANI 92.1a, 3 pressure angle, flat root, side fit, tolerance class 5 pline according to ANI 92.1a, run out of spline is a deviation from standard. Thread according to AME 1.1 For the maximum tightening torques the general instructions on page 52 must be observed. Ports Designation Port for tandard ize 5) Max. press. [psi (bar)] 6) ervice line, fastening thread uction line, fastening thread AE J518 AME 1.1 AE J518 AME 1.1 1 1/4 in 1/2-13 UNC-2;.75 (19) deep 2 1/2 in 1/2-13 UNC-2;.87 (22) deep 51 (35) O 145 ( O Case drain fluid IO 11926 7) 1 1/16-12 UNF-2;.71 (18) deep 3 (2) O 8) 1 Case drain fluid IO 11926 7) 1 1/16-12 UNF-2;.71 (18) deep 3 (2) 8) Pilot pressure IO 11926 7) 7/16-2 UNF-2;.45 (11.5) deep 51 (35) O Pilot pressure with DG-control DIN IO 228 7) G 1/4 in;.47 (12) deep 51 (35) O 5) For the maximum tightening torques the general instructions on page 52 must be observed. 6) Depending on the application, short-term pressure spikes can occur. Consider this when selecting measuring equipment and fittings. Pressure values in psi (bar) absolute. 7) The spot face can be deeper than as specified in the standard. 8) Depending on the installation position, or 1 must be connected (see also installation instructions on pages 48, 49) O = Must be connected (plugged on delivery) = Plugged (in normal operation) tate
RA-A 9271/3.12 (A) A1V()O eries 31 osch Rexroth Corp. 35/52 Dimensions size 1 DG Two-point control, directly operated, port plate 61 efore finalizing your design request a certified DG Two-point control, directly operated, port plate 62 View Z 1.55 (268) 12.13 (38) 12.4 (315) 1..12 (3) DIA.98(Ø25 +.4 ) Z 3.19 (8 5.6 (128.5) 5.22 (132.5) 1..12 (3) DIA +.4.98(Ø25 ) DR Pressure control, port plate 61 DR Pressure control, port plate 62 View Z 13.54 (344) max. 4.33 (1 Z 6.5 (165) max. 4.33 (1 DRG Pressure control, remotely operated, port plate 61 DRG Pressure control, remotely operated, port plate 62 View Z 12.87 (327) 13.54 (344) 3.9 (99) 9.84 (25) 1.57 (4) max. 4.33 (1 Z 5.83 (148) 6.5 (165) 1.57 (4) max. 4.33 (1 Details on connection options and shaft ends can be found on pages 33 and 34
36/52 osch Rexroth Corp. (A)A1V()O eries 31 RA-A 9271/3.12 Dimensions size 1 DFR Pressure, flow and power control, port plate 61 efore finalizing your design request a certified DFR Pressure, flow and power control, port plate 62 4.37 (11 1.89 (49) 13.54 (344) max. 4.33 (1 4.27 (18.5) 5.72 (145.3) 5.8 (129) 12.12 (38) 1.57 (4) 5.83 (148) 6.48 (164.5) 5.8 (129) ED7./ER7. Electro-hydraulic pressure control, port plate 61 4.6 (117) ED7./ER7. Electro-hydraulic pressure control, port plate 62 5.51 (14) 5.51 (14) see page 33 View Z 1.55 (268) 1.4 (35.6) Z 13.54 (344) 6.5 (165) 2) ER7.: 14.92 in (379 mm) when using a sandwich plate pressure reducing valve. 2) ER7.: 7.87 in (2 mm) when using a sandwich plate pressure reducing valve. Details on connection options and shaft ends can be found on pages 33 and 34