Pressure reducing valve, pilot operated Type ZDR RE 686 Version: 0-0 Replaces: 0.0 Size 0 Component series X Maximum operating pressure 5 bar Maximum flow 00 l/min H775 Features Contents Sandwich plate valve Porting pattern according to ISO 440-05-04-0-05 4 pressure ratings 4 adjustment types, optionally: Rotary knob Bushing with hexagon and protective cap Lockable rotary knob with scale Rotary knob with scale Check valve, optional (version "A" and "B") Pressure gauge connection Features Ordering code Symbols Function, section 4 Technical data 5 Characteristic curves 6 Dimensions 7, 8 More information 9 RE 686, edition: 0-0, Bosch Rexroth AG
/0 ZDR Pressure reducing valve Ordering code 0 0 0 04 05 06 07 08 09 0 Z DR 0 V X / Y * 0 Sandwich plate valve Z 0 Pressure reducing valve DR 0 Size 0 0 04 Pilot operated V Pressure reduction 05 In channel A A In channel B B In channel P P Adjustment type 06 Rotary knob 4 Bushing with hexagon and protective cap 5 Lockable rotary knob with scale 6 ) Rotary knob with scale 7 07 Component series 0 9 (0 9: Unchanged installation and connection dimensions) X Secondary pressure 08 Up to 50 bar 50 Up to 00 bar 00 Up to 00 bar 00 Up to 5 bar 5 09 Pilot oil supply internal, pilot oil return external Y 0 With check valve (only version "A" and "B") no code Without check valve M Seal material NBR seals no code FKM seals V Attention: Observe compatibility of seals with hydraulic fluid used! (Other seals upon request) Connection thread Pipe thread according to ISO 8/ no code SAE thread Further details in the plain text ) H-key with the material no. R90000858 is included in the scope of delivery. Notice! Preferred types and standard units are contained in the EPS (standard price list). Bosch Rexroth AG, RE 686, edition: 0-0
Pressure reducing valve ZDR /0 Symbols ( = component side, = plate side) Pressure reduction in channel A ("A") Pressure reduction in channel B ("B") M M P A B P A B Pressure reduction in channel A ("A M") Pressure reduction in channel B ("B M") M M P A B P A B Pressure reduction in channel P ("P M") M P A B Notice! Deviating from ISO 440, port T is in this data sheet called, port T is called. RE 686, edition: 0-0, Bosch Rexroth AG
4/0 ZDR Pressure reducing valve Function, section Pressure valves of type ZDR 0 V are pilot operated pressure reducing valves in sandwich plate design. They are used for reducing a system pressure. The pressure valves basically consist of pilot control valve () and housing (). The secondary pressure is set via the adjustment type (4). Pressure reduction in channel P ("P") In the initial position the valves are open. Hydraulic fluid can flow from channel P to channel P without restrictions. The pressure in channel P acts simultaneously at the main spool (6), via the bore (5) at the spring-loaded inside of the main spool (6) and via the nozzle (9) on the pilot poppet (8). If the pressure in channel P exceeds the value set at the compression spring (7), the pilot poppet (8) opens. Hydraulic fluid flows from the spring-loaded inside of the main spool (6) via the nozzle (9) and the pilot poppet (8) into the spring chamber (0). The main spool (6) assumes its control position and keeps the value in channel P set at the compression spring (7) constant. The pilot oil return from the spring chamber (0) is effected via port. Pressure reduction in channel A and B ("A" and "B") For free flow back from channel A to A / B to B, a check valve can be installed as option (not possible with version "P"). A pressure gauge connection () allows for the control of the secondary pressure. 4 0 7 8 9 P A B Type ZDR 0 VP5 X/.YM 5 6 A B P = component side = plate side Bosch Rexroth AG, RE 686, edition: 0-0
Pressure reducing valve ZDR 5/0 Technical data (for applications outside these parameters, please consult us!) general Weight Version "A" and "P" kg Approx.. Version "B" kg Approx..7 Ambient and storage temperature range C 0 +80 (NBR seals) 0 +80 (FKM seals) hydraulic Maximum set pressure bar 50; 00; 00; 5 Maximum inlet pressure Port A, B, P bar 5 Maximum secondary pressure Port A, B, P bar 5 Maximum counter pressure Port, bar 60 Maximum flow l/min 00 Hydraulic fluid Hydraulic fluid temperature range See table below C 0... +80 (NBR seals) 0... +80 (FKM seals) Viscosity range mm /s 0 800 Maximum permitted degree of contamination of the hydraulic fluid - cleanliness class according to ISO 4406 (c) Class 0/8/5 ) Hydraulic fluid Classification Suitable seal materials Standards Mineral oils HL, HLP NBR, FKM DIN 554 Bio-degradable insoluble in water HETG NBR, FKM VDMA 4568 HEES FKM soluble in water HEPG FKM VDMA 4568 Flame-resistant water-free HFDU FKM ISO 9 containing water HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 60) NBR ISO 9 Important information on hydraulic fluids! For more information and data on the use of other hydraulic fluids refer to data sheet 900 or contact us! There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.)! Flame-resistant containing water: Maximum pressure differential per control edge 0 bar, otherwise, increased cavitation Life cycle as compared to operation with mineral oil HL, HLP 0 to 00 % Maximum hydraulic fluid temperature 60 C ) 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 life cycle of the components. For the selection of the filters see www.boschrexroth.com/filter. RE 686, edition: 0-0, Bosch Rexroth AG
6/0 ZDR Pressure reducing valve Characteristic curves (measured with HLP46, ϑ oil = 40 ± 5 C) p A -q V characteristic curves p A -q V characteristic curves (up to 50 bar) Secondary pressure in bar 5 00 50 00 50 00 50 Secondary pressure in bar 50 40 0 0 0 9 8 0 0 40 60 80 00 0 0 40 60 80 00 Flow in l/min Flow in l/min p min -q V characteristic curves p-q V characteristic curves Minimum pressure differential in bar 0 5 0 5 0 5 0 0 40 60 80 00 Pressure differential in bar 0 5 0 5 0 5 0 0 40 60 80 00 5 4 Flow in l/min Flow in l/min q V St -q V characteristic curves with p (p E p A ) P to P (version "P") 0,6 A to A (version "A") Pilot flow in l/min 0,5 0,4 6 7 B to B (version "B") 4 A to A (version "A") 5 B to B (version "B") 6 p = 50 bar 7 p = 50 bar 8 Actuator resistance system-dependent 0, 0 0 40 60 80 00 9 Lowest adjustable secondary pressure p A for all pressure ratings Flow in l/min Bosch Rexroth AG, RE 686, edition: 0-0
Pressure reducing valve ZDR 7/0 Dimensions: Version "A" and "P" (dimensions in mm) 6 4 5 8 5 9 04 6 0 9 8 0 4 50 0 58,6 8,5 8 F P F 5 A B 8 8 9,5 69 Required surface quality of the valve contact surface F4 F 9 5, 4 x 6,7 7,5 Plate side porting pattern according to ISO 440-05-04-0-05 Component side porting pattern according to ISO 440-05-04-0-05 Name plate Adjustment type "4" Adjustment type "5" 4 Adjustment type "6" 5 Adjustment type "7" 6 Dimensions required to remove the key 7 Valve mounting bores 8 Lock nut SW4 9 Hexagon SW0 0 Identical seal rings for ports A, B, P,, (plate side) Pressure gauge connection G/8; 8.5 deep; internal hexagon SW5 Hexagon SW0, tightening torque M A = 50 Nm Valve mounting screws (separate order) 4 hexagon socket head cap screws ISO 476 - M6-0.9-flZn-40h-L Friction coefficient µ total = 0.09 to 0.4, tightening torque M A = Nm ± 0 % Notice! Deviating from ISO 440, port T is in this data sheet called, port T is called. Bored for port X and Y (e. g. for pilot operated directional valve size 0), version SO0 is applicable! The device dimensions are nominal dimensions which are subject to tolerances. RE 686, edition: 0-0, Bosch Rexroth AG
8/0 ZDR Pressure reducing valve Dimensions: Version "B" (dimensions in mm) 5 4 6 8 89 0 50 0 9 8 6 8 0 0 7 4 x 6,7 8,5 5,8 F P F 70 6,5 A B 5,5 4 F4 6,5 F 0,5 8 9 Required surface quality of the valve contact surface Plate side porting pattern according to ISO 440-05-04-0-05 Component side porting pattern according to ISO 440-05-04-0-05 Name plate Adjustment type "4" Adjustment type "5" 4 Adjustment type "6" 5 Adjustment type "7" 6 Dimensions required to remove the key 7 Valve mounting bores 8 Lock nut SW4 9 Hexagon SW0 0 Identical seal rings for ports A, B, P,, (plate side) Pressure gauge connection G/8; 8.5 deep; internal hexagon SW5 Hexagon SW0, tightening torque M A = 50 Nm Valve mounting screws (separate order) 4 hexagon socket head cap screws ISO 476 - M6-0.9-flZn-40h-L Friction coefficient µ total = 0.09 to 0.4, tightening torque M A = Nm ± 0 % Notice! Deviating from ISO 440, port T is in this data sheet called, port T is called. Bored for port X and Y (e. g. for pilot operated directional valve size 0), version SO0 is applicable! The device dimensions are nominal dimensions which are subject to tolerances. Bosch Rexroth AG, RE 686, edition: 0-0
Pressure reducing valve ZDR 9/0 More information Subplates Data sheet 45054 Hydraulic fluids on mineral oil basis Data sheet 900 Reliability characteristics according to EN ISO 849 Data sheet 080 General product information on hydraulic products Data sheet 07008 Installation, commissioning and maintenance of industrial valves Data sheet 0700 Selection of the filters www.boschrexroth.com/filter RE 686, edition: 0-0, Bosch Rexroth AG
0/0 ZDR Pressure reducing valve Notes Bosch Rexroth AG Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany Phone +49 (0) 9 5 / 8-0 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. Bosch Rexroth AG, RE 686, edition: 0-0
Pressure reducing valve ZDR /0 Notes Bosch Rexroth AG Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany Phone +49 (0) 9 5 / 8-0 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. RE 686, edition: 0-0, Bosch Rexroth AG
/0 ZDR Pressure reducing valve Notes Bosch Rexroth AG Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany Phone +49 (0) 9 5 / 8-0 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. Bosch Rexroth AG, RE 686, edition: 0-0