Pressure reducing valve, pilot operated Type DR

Transcription

1 RE 6 9/0.0 Replaces: 0.0 Pressure reducing valve, pilot operated Type DR Nominal sizes 0 to Series Maximum operating pressure 0 bar Maximum flow 00 L/min K660-9 Type DR 0--/... Overview of contents Features Contents Page Features Ordering details Preferred types Function, section Symbols Technical data Characteristic curves, 6 Performance limits Unit dimensions 7 to 9 For subplate mounting, porting pattern to DIN 0 form D, ISO 7 and CETOP RP H, subplates to catalogue sheet RE 06 (separate order) For threaded connections For manifold mounting adjustment elements: Rotary knob Sleeve with hexagon and protective cap Lockable rotary knob with scale Rotary knob with scale pressure stages Check valve, optional (only for subplate mounting valves). 00 by osch Rexroth G, Industrial Hydraulics, D-97 Lohr am Main ll rights reserved. No part of this document may be reproduced or stored, processed, duplicated or circulated using electronic systems, in any form or by any means, without the prior written authorisation of osch Rexroth G. In the event of contravention of the above provisions, the contravening party is obliged to pay compensation. DR /0 RE 6 9/0.0

2 Ordering details Pilot operated valve = No code DR * Pilot operated valve = C without main spool insert No code = (do not enter nom. size) V = Pilot operated valve = C with main spool insert (enter valve size 0) Nom. Valve for size Subplate mounting Threaded connections No code ) = G M = Ordering details 0 = 0 = 0 (G /) = 6 = (G /) = 0 = 0 (G ) = (G /) = 0 = 0 (G /) For subplate mounting = For threaded connections = G djustment element Rotary knob = Sleeve with hexagon and protective cap = Lockable rotary knob with scale = 6 ) Rotary knob with scale = 7 ) H-key to Material No. R90000 is included within the scope of supply ) Only possible for version without check valve ) Only available as pilot operated valve for subplate mounting Further details in clear text NR seals FKM seals (other seals on request) ttention! The compatibility of the seals and pressure fluid has to be taken into account! With check valve Without check valve Pilot oil supply Internal pilot oil supply, external pilot oil drain 0 = Settable pressure up to 0 bar 00 = Settable pressure up to 00 bar 00 = Settable pressure up to 00 bar = Settable pressure up to bar 0 ) = Settable pressure up to 0 bar = Series 0 to 9 (0 to 9: unchanged installation and connection dimensions) Preferred types (readily available) Type DR 0 --/00 DR 0 --/00 DR 0 --/ DR 0 --/00 DR 0 --/00 DR 0 --/ DR 0 --/00 DR 0 --/00 DR 0 --/ Material number R R90007 R90096 R R R R R R Preferred types and standard components are highlighted in the RPS (standard price list). RE 6 9/0.0 9/0.0 /0 DR

3 Function, section Type DR pressure valves are pilot operated pressure reducing valves, which are controlled from the secondary circuit. They basically consist of main valve () with main spool insert () and pilot control valve () with pressure adjustment element. t rest, the valves are open, this means that fluid can freely pass from port, to port via the main spool insert (). Pressure present in port acts on the under side of the main spool. t the same time there is pressure acting on the ball (6) in the pilot control valve () via the orifice () on the spring-loaded side of the main spool () and via port (). This pressure also acts on the ball (6), via the orifice (7), control line (), check valve (9) and orifice (0). Depending on the setting of spring (), pressure builds up in front of the ball (6), in port () and in spring chamber (), which holds the control spool () in the open position. Pressure fluid can freely flow from port to port via mian spool insert () until the pressure in port exceeds the value set at spring () and opens the ball (6). The control spool () moves to the closed position. The desired reduced pressure is achieved, when a balance between the pressure in port and the pressure set at spring () is reached. Pilot oil drain from spring chamber () to tank always takes place externally via control line (). Free return flow from port to port can be achieved by installing an optional check valve (6). pressure gauge connection (7) allows the reduced pressure in port to be monitored a a Type DR..--/... Symbols 6 Without check valve With check valve Type DR..-.-/...M.. Type DR..-.-/... (only for subplate mounting) DR /0 RE 6 9/0.0

4 Technical data (for applications outside these parameters, please consult us!) General Installation Optional mbient temperature range C 0 to + 0 for NR seals C 0 to + 0 for FKM seals Weight DR 0 DR 6 DR 0 DR DR Hydraulic Subplate mounting DR kg...0 DRC kg. DRC 0 kg. Threaded connections DR..G kg Nominal pressure bar 0 ) Maximum operating pressure at port bar 0 ) Operating pressure range at port bar 0 to 0 ) Maximum back pressure at port bar 0 ) Settable pressure Minimum bar Flow related (see characteristic curves on page ) Maximum bar 0; 00; 00; ; 0 ) Maximum flow DR 0 DR 6 DR 0 DR DR Subplate mounting L/min Threaded connections L/min Pressure fluid Mineral oil (HL, HLP) to DIN ) ; Fast bio-degradable pressure fluids is to VDM 6 (also see RE 90 ); HETG (rape seed oil) ) ; HEPG (polyglycols) ) ; HEES (synthetic ester) ) ; Other pressure fluids on request Pressure fluid temperature range C 0 to + 0 for NR seals Viscosity range mm /s 0 to 00 C 0 to + 0 for FKM seals Cleanliness class to ISO code Maximum permissible degree of contamination of the pressure fluid is to ISO 06 (C) class 0// ) ) 0 bar only possible for version without check valve ) Suitable for NR and FKM seals ) Only suitable for FKM seals ) The cleanliness class stated for the components must be adhered too in hydraulic systems. Effective filtration prevents faults from occurring and at the same time increases the component service life. For the selection of filters see catalogue sheets RE 0 070, RE and RE 0 0. RE 6 9/0.0 9/0.0 /0 DR

5 RE 6 9/06.9 Characteristic curves (measured with HLP6, ϑ oil = 0 C ± C) Outlet pressure in bar Outlet pressure p in relation to the flow q V ( to ) NS 0 NS NS Flow in L/min 6 Minimum settable pressure at p min in relation to the flow q V ( to ) NS 0 NS NS Reduced pressure in bar 0 6 p min Flow in L/min Performance limit (dependent on system) = NS 0 = NS = NS 0 p-q V -characteristic curves ( to ; lowest settable pressure differential) Pressure differential in bar 0 6 NS 0 NS NS Flow in L/min DR /0 RE 6 9/0.0

6 RE 6 9/draft Characteristic curves (measured with HLP6, ϑ oil = 0 C ± C) Control flow in relation to the flow ( to ) and to the pressure differential Control flow in L/min,,0 0, NS 0 NS p = 0 bar p = 00 bar NS Flow in L/min 0 p-q V -characteristic curves via the check valve ( to ) Pressure differential in bar 0 0 NS 0 NS NS Flow in L/min Flow resistance via check valve, the main stage closed Flow resistance via check valve with the main stage fully open RE 6 9/0.0 6/0 DR

7 RE 6 9/06.9 Unit dimensions: subplate mounting (Dimensions in mm) Ø 0 9 Ø H 6; Ø 9,. 6 0,0/00mm R max L L Ø 6 G /; L L7 L L6 L L9 L0 L Required surface finish of mating piece H H Ø 9. 0 Name plate. Port for external pilot oil drain. Port optional for external pilot oil drain (G /; ) Port without function (blind bore) djustment element djustment element 6 djustment element 6 7 djustment element 7 Hexagon 0/F 9 Space required to remove key 0 Locating pin valve fixing holes for DR 0 and 0 6 valve fixing holes for DR 0 Pressure gauge connection Same seal rings for ports and, same seal rings for ports and Subplates to catalogue sheet RE 06 and valve fixing screws must be ordered separately. Subplates for: DR 0 G 60/0 (G /) G 6/0 (G /) DR 0 G /0 (G /) G /0 (G ) DR 0 G /0 (G /) G /0 (G /) Valve fixing screws for: DR 0 off M0 x 0 DIN 9-0.9; M = 7 Nm DR 0 off M0 x 60 DIN 9-0.9; M = 7 Nm DR 0 6 off M0 x 70 DIN 9-0.9; M = 7 Nm Type L L L L L L6 L7 L L9 L0 H H H DR DR DR DR 7/0 RE 6 9/0.0

8 RE 6 9/06.9 Unit dimensions: threaded connections (dimensions in mm) 69. G /; 9 0 6; Ø 0 Ø 9, 0 Ø Ø G /;, D T 7 6 T D Ø D Ø 7 Ø D Name plate. Port for external pilot oil drain djustment element djustment element 6 djustment element 6 7 djustment element 7 Hexagon 0/F 9 Space required to remove key Valve fixing hole Pressure gauge connection Type D ØD T DR 0 G G / DR G G / 6 DR 0 G G 7 DR G G / 0 DR 0 G G / 6 RE 6 9/0.0 /0 DR

9 RE 6 9/0.9 Unit dimensions: pilot valve with (DRC 0) or without (DRC) main spool insert (Dimensions in mm). G /; ; Ø 0 Ø 9, 9 0 Ø, 6 6 7, Ø, 9. 9 Name plate. Port for external pilot oil drain. Port optional for external pilot oil drain djustment element djustment element 6 djustment element 6 7 djustment element 7 Hexagon 0/F 9 Space required to remove key Valve fixing holes Seal rings Main spool insert 6 Hole Ø can meet hole Ø at any point. Care however has to be taken that the connection hole and the fixing holes are not damaged 7 ack-up ring and seal rings are to be inserted into this cavity before fitting the main spool Seal ring 9 Seal ring 0 Seal ring ack-up ring ack-up ring Orifice must be ordered separately Ø x x max. R 0, Ø 6 M; 6 9 ±0, Ø Ø H7 Ø, +0, Ø, +0, Ø 6 ±0, 0,00 Ø0,0 Z Ø Z Z x 0 Ø, Z ,0/00 mm Ø 0 +0, +0,0 +0, Z = = =, ±0, R max R z R z 6 0,0 off valve fixing screws M x 0 DIN 9-0.9, M = 7 Nm, must be ordered separately 6 View Z 6 x M; DR 9/0 RE 6 9/0.0

10 Notes osch Rexroth G Industrial Hydraulics D-97 Lohr am Main Zum Eisengießer D-976 Lohr am Main Telefon 0 9 / -0 Telefax 0 9 / - Telex documentation@boschrexroth.de Internet osch Rexroth Limited Cromwell Road, St Neots, Cambs, PE9 ES Tel: 0 0/ 6 Fax: 0 0/ 90 info@boschrexroth.co.uk The data specified above only serves to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. The details stated do not release you from the responsibility for carrying out your own assessment and verification. It must be remembered that our products are subject to a natural process of wear and ageing. RE 6 9/0.0 0/0 DR