Proportional flow control valve, with integrated pressure compensator RE 87/. / Type KUDSR Component size Component series A Maximum operating pressure 5 bar Maximum flow l/min H7659 Table of contents Content Page Features Ordering code Valve types Available coils Function, symbol Technical data 4, 5 Characteristic curves 6 Minimum terminal voltage at the coil 7 Unit dimensions 8 Mounting cavity 9 Available individual components Features Mounting cavity R/UNF-6---6 Direct operated proportional valve for controlling the flow size Operation by means of proportional solenoid with central thread and detachable coil Rotatable solenoid coil With concealed manual override Control electronics: Module amplifier VT-MSPA... Plug-in amplifier VT-SSPA... Module amplifier RA-/... Information on available spare parts: www.boschrexroth.com/spc
/ Bosch Rexroth AG Hydraulics KUDSR RE 87/. Ordering code (Valve without coil) ) KUDS R C A F N9 V * Direct operated proportional flow control valve, with integrated -way pressure compensator Maximum operating pressure 5 bar = R Component size = main ports A = F = N9 = V = Further details in the plain text Seal material FKM seals Attention! Observe compatibility of seals with hydraulic fluid used! With concealed manual override High-performance and mounting cavity R/UNF-6---6, see page 9 Component series Symbol De-energized closed = C Valve types (without coil) ) Type KUDSR CA/FN9V Material no. R955657 Available coils (separate order) ) Direct voltage DC K4 pol (+PE) DIN EN 75-8 Material no. for coil with connector ) C4 pol C4/Z AMP Junior-Timer V R98 R968 4 V R974 R968 ) Complete valves with mounted coil upon request ) Mating connectors (order separately) see data sheet 86
RE 87/. KUDSR Hydraulics Bosch Rexroth AG / Function, symbol General The proportional flow control valve is a direct operated cartridge valve in spool design with integrated pressure compensator. It regulates the flow proportionally to the input signal in a continuous form from main port to. Superfluous residual flow is lead to the tank or to another actuator via port. The valve basically comprises of housing, control piston, control spring, pressure compensator piston, orifice bush, pressure compensator spring as well as proportional solenoid () with central thread and detachable coil. Function With de-energized proportional solenoid (), the control piston that is always pressure-compensated to the actuating forces due to its constructive design is held in the initial position by the control spring and blocks the flow between main port and. By energizing the proportional solenoid (), the control spool is adjusted directly proportional to the electrical input signal and, via orifice-like cross-sections (with progressive flow characteristic), connects the main ports and. Due to the integrated pressure compensator piston together with the pressure compensator spring, then pressure drop across the valve is kept constant, independent of the pressures at, and. In case of superfluous flow from, the pressure compensator piston moves to the right and opens the connection to. In case of de-excitation of the proportional solenoid (), the control spring returns the control piston into its initial position. The whole flow is now directly lead from main port to main port. The manual override () allows for the adjustment of the valve without solenoid energization. Symbol Detailed Simple By closing main port, the valve can also be operated as -way flow control valve. = Main port (P) = Main port (T) = Main port (A) Version K4 (with mating connector) Version C4
4/ Bosch Rexroth AG Hydraulics KUDSR RE 87/. Technical Data (For applications outside these parameters, please consult us!) general Weight kg.97 Installation position Any - if it is ensured that no air can collect upstream the valve. Otherwise, we recommend suspended installation of the valve. Ambient temperature range C 4 to + (see minimum terminal voltage page 7) Storage temperature range C to +8 Environmental audits Salt spray test according to DIN 5 h 7 Surface protection Proportional solenoid hydraulic Maximum operating pressure Main port bar 5 Bypass pressure Main port bar 5 with q Vmax Prio pressure Main port bar with q Vmax Control pressure differential to bar to 5 Minimum pressure differential to bar > Maximum flow Main port l/min Nominal flow Main port l/min (for control area) Rated flow to l/min > 8 (controlled) Step response to %; to % ms < 8 (with p = bar) Coating according to DIN 596-Fe//ZnNi with thick layer passivation Hydraulic fluid Mineral oil (HL, HLP) according to DIN 554; quickly bio-degradable hydraulic fluids according to VDMA 4568 (see also data sheet 9); HETG (rape seed oil); HEPG (polyglycols); HEES (synthetic esters); other hydraulic fluids upon request Hydraulic fluid temperature range C 4 to + (preferably +4 to +5) Viscosity range mm /s 5 to 4 (preferably to ) Maximum permitted degree of contamination of the hydraulic Class /8/5 ) fluid - cleanliness class according to ISO 446 (c) Hysteresis ) % 5 Range of inversion ) % Response sensitivity ) % Compensation time with maximum load change (pressure compensator) ) ms System-dependent ) The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and at the same time increases the service life of the components. For the selection of filters, see data sheets 57, 576, 58, 586, 587 and 588. ) Measured with analog amplifier RA-/ acc. to data sheet 95 ) The compensation time is determined by the system set-up. With corresponding nozzle fitting, this can be optimized/adjusted.
RE 87/. KUDSR Hydraulics Bosch Rexroth AG 5/ Technical Data (For applications outside these parameters, please consult us!) electrical Voltage type Direct voltage (DC) Supply voltage V 4 Maximum solenoid current A.8. Coil resistance Cold value at C Ω. 7. Max. hot value Ω 5.8. Duty cycle % (see minimum terminal voltage page 7) Maximum coil temperature 5) C 5 Protection class according Version K4 IP 65 (with mating connector mounted and locked) to VDE 47- (DIN EN 659) DIN 45-9 Model C4 IP 66 (with mating connector mounted and locked) IP 69K (with Rexroth mating connector, material no. R97) Control electronics 6) Analog amplifier RA-/ see data sheet 95 Plug-in amplifier VT-SSPA-.. see data sheet 6 Design according to VDE 58 5) Due to the temperatures occurring at the surfaces of the solenoid coils, the standards ISO 7- and EN 98 need to be adhered to! 6) Separate order At the electrical connection K4, the protective earthing conductor (PE ) has to be connected properly.
6/ Bosch Rexroth AG Hydraulics KUDSR RE 87/. Characteristic curves (measured with HLP46, ϑ Oil = 4 ± 5 C, q V = 8 l/min) Flow in l/min 9 8 7 6 5 4 Controlled flow at main port against load pressure 5 5 5 5 4 Load pressure in bar 8 p-q V characteristic curves, main port to ( open, orifice closed) Pressure differential in bar 6 4 4 6 8 Flow in l/min Flow at main port against command value 9 8 7 Flow in l/min 6 5 4 4 5 6 7 8 9 Command value in %
RE 87/. KUDSR Hydraulics Bosch Rexroth AG 7/ Minimum terminal voltage at the coil and relative duty cycle with V supply voltage against the ambient temperature 5 95 Relative duty cycle in % 95 9 85 8 75 7 65 6-4 - 4 6 8 85 75 65 55 45 5 5 Minimum terminal voltage at the coil in % to the nominal supply voltage Ambient temperature in C with 4 V supply voltage against the ambient temperature 5 65 Relative duty cycle in % 95 9 85 8 75 7 65 6-4 - 4 6 8 6 55 5 45 4 5 Minimum terminal voltage at the coil in % to the nominal supply voltage Ambient temperature in C Relative duty cycle Minimum terminal voltage at the coil Note! The characteristic curves have been determined for coils with valve with medium test block size (8 x 8 x 8 mm), without flow in calm air. Depending on the installation conditions (block size, flow, air circulation, etc.) there may be a better heat dissipation. Thus, the range of application is broadened. In single cases, there may be more unfavorable conditions leading to limitations of the range of application.
8/ Bosch Rexroth AG Hydraulics KUDSR RE 87/. Unit dimensions (dimensions in mm) 8 7 86 ( 9) 5 5 4 5/6- UN-A 5 45 75,5 9 74,5±, 95,±, LS 6 ; 6 = Main port (P) = Main port (T) = Main port (A) LS = Location shoulder Mating connector K4 without circuitry (separate order, see data sheet 86) Space required for removing the mating connector SW6, tightening torque M A = 65 +5 Nm 4 Dimension for K4 mating connector, without circuitry 5 Dimension () for K4 mating connector, with circuitry 6 Mating connector C4 (separate order, see data sheet 86) 7 Nut, tightening torque M A = 5 + Nm 8 Coil (separate order, see page ) 9 Concealed manual override N9
RE 87/. KUDSR Hydraulics Bosch Rexroth AG 9/ Mounting cavity R/UNF6---6; main ports; thread 5/6- UN-B (dimensions in mm) X min 4 5,55±,5, 5/6- UN-B,5 A B A ±,5 Rz 8 75,4 +,5 6,94 +,4 6,5 +,4 5,4 +,4,8 +,4,5 + Y min 6,6 max,7 min 45, max 6,4 Y X 5 Rzmax 8 C max 4, A B,5 A B,5 A 7 +,5 E 8,6 +,5 E Rzmax 8 B max R,4 R, +,, +,4 LS Y 45 5 -, +, ) Rz,5- / Pt - = Main port (P) = Main port (T) = Main port (A) LS = Location shoulder ) Visual inspection All seal ring insertion faces are rounded and free of burrs Standards: Workpiece edges DIN ISO 75 Form and position tolerance DIN EN ISO General tolerances for DIN ISO 768-mK metal-cutting procedures Tolerance DIN ISO 85 Surface quality DIN EN ISO
/ Bosch Rexroth AG Hydraulics KUDSR RE 87/. Available individual components 9 9 999 Item Description Direct voltage Material no. 9 Nut R99574 9 O-ring for pole tube R957 999 Seal kit of the valve R966 Coils (separate order) see page. Bosch Rexroth AG Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany Phone +49 () 9 5 / 8- Fax +49 () 9 5 / 8-58 documentation@boschrexroth.de www.boschrexroth.de This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent. The data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. The information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.