29 188/ way Proportional Flow Control Valve Model 2 FRE 6./.,Series 2X. Ordering Code: Proportional Flow Control Valve 2 FRE 6 2X K4 V *

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1 -way roportional low Control Valve Model RE./.,Series X Size... SI ( bar).... GM ( L/min) R 9 88/.98 R 9 88/.98 Replaces:.9 With pressure compensator for the control of an oil flow independent of pressure differential Operating by proportional solenoid Mounts on standard ISO -, N T..M R and NSI 9. O interface, for subplates, see R With electrical positional feeedback of the control orifice xially adjustable transducer coil, allowing simple null point adjustment (electro-hydraulic) of the orifice Minimal typical control variation of the RE and electrical amplifier VT (ordered separately) see page and 8 low regulation in both directions, using a rectifier sandwich plate K 8- Model RE -X/ with associated electronic amplifier (ordered separately) Ordering Code: roportional low Control Valve RE X K V * with external closing of the pressure compenstor = (for suppression of starting jump) without external closing of the pressure compensator= Series to 9 = X ( to 9, externally interchangeable) low range Linear:. GM ( L/min) = L. GM ( L/min) = L. GM (8 L/min) = 8L rogressive:....8 GM ( L/min) = Q....9 GM ( L/min) = Q.... GM ( L/min) = Q.... GM ( L/min) = Q.... GM ( L/min) = Q rogressive with ast Traverse Range fine control range.... GM ( L/min) = QE K = urther details to be written in clear text V = M seals suitable for petroleum oils (HM, HL, HL) and phosphate ester fluids (HD-R) R = with non-return valve M = without non-return valve Electrical connection at proportional solenoid with component plug to DIN -M without plug-in connector separate order under material no. RR 8 Inductive positional transducer lug connection to DIN orm, feedback plug-in connector included Ordering Code: Sandwich late Rectifier ZS X V * Size = Series to 9 = X ( to 9, externally interchangeable) M seals suitable for petroleum oils (HM, HL, HL) and phosphate ester fluids (HD-R) = V urther details to be written in clear text /8

2 R 9 88/.98 Description of unction, Section roportional flow control valves Model RE are -way valves. They allow a preset electrical signal to control an oil flow independent of pressure and temperature variation. The assembly consists of a housing (), a proportional solenoid with inductive positional transducer (), measuring orifice (), pressure compensator () and check valve (), if required. roportional flow control valves Model RE -X/...KRV (without external piloted closing with check valve) roportional flow control valves Model RE are -way valves. They allow a preset electrical signal to control an oil flow independent of pressure and temperature variation. The assembly consists of a housing (), a proportional solenoid with inductive positional transducer (), measuring orifice (), pressure compensator () and non-return valve (), if required. The oil flow required is set using a potentiometer (... %), which in turn gives an input value to amplifier type VT. This in turn controls the orifice () via the proportional solenoid. The position of the orifice () is determined by the inductive positional transducer, and any difference from the given input value is then corrected by the control system. The pressure drop across the measuring orifice () is held constant by the pressure compensator (). The oil flow is therefore independent of load. The low temperature drift is achieved by suitable design of the measuring orifice. t an input level of % the measuring orifice is closed. In the event of electrical failure, or if the wire to the positional transducer should break, the measuring orifice closes. jump-free start is possible from the input value. The orifice may be opened and closed gradually by two ramps in the electronic amplifier. ree flow from to is possible via the non-return valve (). With an additional rectifier sandwich plate Model Z S... mounted under the proportional flow control valve, the actuator can be controlled both in meter-out and meter-in modes. roportional flow control valves Model RE -X/...KMV (with external piloted closing without check valve) The function of this unit is in principle the same as that of Model RE -X/...RV In order to reduce the jump at start with the orifice () partially open (signals > ) there is provision to hold the pressure compensator () closed via port (). The internal connection () between port and pressure compenstor () is plugged. The pressure before directional valve (8) is fed via external port () to the pressure compensator (), and holds this against the force of the spring (9) in the closed position. When the directional valve (8) is switched from to, the pressure compensator () moves from the closed position to the regulating position, and the starting jump is therefore avoided. Model RE -X/...RV 9 ctuator 8 T Model RE -X/...MV Orifice /8

3 Symbols: roportional low Control Valve (simplified/comprehensive) R 9 88/.98 simplified Model RE -X/...M Model RE -X/...R Model RE -X/...M Model RE -X/...R comprehensive Symbols: Sandwich late Rectifier (Codes: = valve side, = subplate side) T ositional Transducer Shield roportional Solenoid Connection on component plug lug-in connector to DIN - Solenoid plug g (Z) part no. RR 8 Solenoid plug /" NT (Z) part no. RR 9 E.8 (.).8 (.).9 () Connection on plug-in connector. () Ø.89 (.) E.8 ().8 () /8

4 R 9 88/.98 Technical Data (or application outside the above parameters, please consult us) General Mounting position optional mbient temperature ( C)... (... ) Weight roportional flow control valve lbs (kg). (.8) Sandwich plate rectifier lbs (kg). (.9) Hydraulic, roportional flow control valve Operating pressure, max. permissible port SI (bar)... () Model L L 8L Q Q Q Q Q QE low: q V max. GM L/min () () (8) () () () () () () q V min.... SI in /min ( bar) (cm /min) () () () () () () () () ()... SI in /min ( bar) (cm /min) () () () () () () () () () Maximum leakage at input value % (measured at p SI in /min ν = 9 SUS ( bar) (cm /min) () () () () () () () () () ( mm /s) and SI in /min t = ( C) ( bar) (cm /min) () () (8) () () (8) () () () SI in /min ( bar) (cm /min) () () () () () () () () () Minimum differential pressure SI (bar) 8... (... ) p pressure drop for free flow : see diagram page low regulation input/output pressure see diagram page low characteristics see diagram page Temperature drift hydraulic + electrical Hydraulic fluid etroleum oils (HM, HL, HL); hosphate ester fluids (HD-R) luid cleanliness: Maximum allowable cleanliness level class / to 8/, according to ISO. Therefore, we recommend a filter with a minimum retention rate of ß. luid temperature range ( C)... 8 (... ) Viscosity range SUS (mm /s)... (... 8) Hysteresis % < ± of q V max Repeatability % < of q V max Typical overall Valve RE.. % ± of signal values > % in each case ± of signal values < % of set flow value variation mplifier VT % <. Hydraulic, Sandwich plate rectifier Operating pressure SI (bar)... () Cracking pressure SI (bar) (.) low GM (L/min). () Electrical, roportional-solenoid Insulation exceeds NEM class (I ) Electrical supply DC Solenoid coil resistance cold at 8 ( C) Ω. max. value, warm Ω 8. Duty rating % continuous Electrical connections plug connection to DIN /-pole + E/g Electrical, Inductive positional transducer Insulation exceeds NEM class (I ) Coil resitance at 8 ( C) and and and (see page ) Ω... Electrical connections plug connection to DIN, form Inductivity mh to 8 Oscillator frequency khz. Electronic control (ordered separately) ssociated amplifier in eurocard format Model VT see page 8 or data sheet R 9 9 /8

5 R 9 88/.98 requency of Response: measured at t = ( C); Inlet ressure = SI ( bar),. Gal. ( L) orifice Valve operating time with stepped input signal Stroke in % Time in ms requency reponse curve mplitude ratioi in d Curve Input value amplitude to % ( % ± %) Curve Input value amplitude to % ( % ± %) 9 haseangle in degrees requency in Hz Operating Curves, measured at ν = 9 SUS ( mm /s), t = ( C), Inlet ressure = SI ( bar) Dependency of flow on input voltage level (controlled flow from ) low in GM (L/min) (.) (.) (.) (.8) (.)..... L L low in GM (L/min) () () () () () QE 8 L low in GM (L/min) () () () () () () Q Q Q Q Q 8 Input voltage level in % 8 Input voltage level in % 8 Input voltage level in % /8

6 R 9 88/.98 Operating Curves: measured at ν = 9 SUS ( mm /s), t = ( C) low in GM (L/min) () () () () () () low control in relation to pressure drop p Q Q Q 8 L Q L Q L low in GM (L/min) () () () () () () Q Q Q 8 L Q L Q L () () () () () () Inlet pressure () in SI (bar) [ressure in ~ SI ( bar)] () () () () () () Outlet pressure () in SI (bar) [ressure in ~ SI ( bar)] low in in /min (cm /min) () () () 8 () () () () 8 () () () () (8) Temperature dependency at p = SI ( bar) 8 ressure drop in p in SI (bar) () () () () () () () 8 ressure drop across check valve during reverse free-flow (, with flow orifice closed () Note: Three different temperature characteristics occur dependent on the flow range (8) () () () () low in GM (L/min) () () () () () () () () Temperature of fluid and valve in ( C) ressure drop in p in SI (bar) () () () () () () 8 ZS Rectifier sandwich plate ressure drop vs. flow curve (equal in both directions and ) () () () () low in GM (L/min) () /8

7 Unit Dimensions, roportional low Contol Valve: dimensions in inches (millimeters) Valve housing roportional solenoid with inductive positional transducer (LVDT) Space required to remove plug Nameplate Mounting pattern to ISO -, N T..M R and NSI 9. O Subplates, see R G / (/" NT) G / (SE-; /-) G / (/8" NT) G / (SE-; 9/-8) G / (/" NT) G / (SE-8; /-) Valve mounting bolts "- UNC x -/" (M x ) without rectifier plate "- UNC x -/" (M x ) with rectifier plate installed Socket head cap screw (SE grade 8 or better) Tightening torque 8 lb-in (9 Nm) Subplate and valve mounting bolts must be ordered separately O-ring 9. mm x.8 mm ports,, and blind recess R-ring 9.8 mm x. mm x.8 mm Inlet port 8 Outlet port 9 lind recesses Ø.9 (.)./. in./ mm (R max ) Required surface finish of interface when mounting the valve without our subplate. () Ø.9 (.) Ø.8 (). (9).88 (). (). (). ().8 () Ø.9 (.) Ø. (8).8 (8). ().9 (.) Unit Dimensions, Sandwich plate rectifer valve: dimensions in inches and millimeters) Detail Y Model RE () "Y" Detailt Y Model RE... R 9 88/.98 8 Ø.9 () Ø. (.) 8.9 ().9 (.).8 (9.8) Valve housing Valve mounting bolts (ordered separately) O-rings 9. mm x.8 mm (ports & ) R-ring 9.8 mm x. mm x.8 mm ZS Rectifier sandwich plate Subplates, see page (ordered separately) Warning: Rectifier sandwich plate Model ZS-X/V cannot be used with flow control valve Model RE - X/... with external pilot closing feature 8.9 (). () max.. (). (). ().8 (.).9 (.). () Ø.9 (.);. (.) deep Ø. (8) /8

8 R 9 88/.98 Electronic control: mplifiers Model VT (ordered separately) Technical Data: Supply voltage V eff : V + % % Max. output current I max :. requency range (output stage) f: Hz to khz Card dimensions: Euro card.9 x.9 in ( x mm) DIN 9 ront plate dimensions Height: U. in (8. mm) Space on solder side: H. in (.8 mm) Space on component side: H or applications outside these parameters, please consult us! urther informationen: see data sheet R 9 9 Terminal Connections / lock Circuit Diagram External limiting signal 8c Ramp off/on Note: Measured zero (M) (control zero) is raised +9 V with respect to zero volt line (L) of the supply voltage! External time potentiometer Command level input +9 V Command level input + V Differential amplifier input: Reference potential + V ctual value output (R i -measuring instrument > kω) 9 V Measuring zero (M) +9 V c c c a c a a ac 8ac ac 8a v v R k R M X M X ID R = = v i ac ac c c c L c Relay common supply + V + V (VL) Supply voltage V (L) k L 8ac ac ac + V Ramp generator ID regulator Current regulator ower amplifier Oscillator Demodulator Limiting amplifier = L Cable break detector 9 ower supply Inductive positional transducer Solenoid Cable break LED Differential amplifier R = Ramp time "up" R = Ramp time "down" R = Gain k = Relay select X = Test point of feedback value X = Test point of command value = on front plate Ordering Code VT S X * pin blade connection, DIN, form D = S urther details to be written in clear text Series to 9 ( to 9, externally interchangeable) = X R = R = no code = E = German face plate English face plate Ramp time up to s Ramp time up to s 8/8 Mannesmann Rexroth Corporation Rexroth Hydraulics Div., Industrial, City Line Road, ethlehem, 8- Tel. () 9-8 ax: () 9-8 Rexroth Hydraulics Div., Mobile, Old Mansfield Road, Wooster, OH 9-9 Tel. () - ax: () - ll rights reserved Subject to revision rinted in U.S..