Pressure relief valve, direct operated

Transcription

1 ressure relief valve, direct operated R 25402/05.0 Replaces: /1 ype DBD Nominal sizes to 0 Component series 1X Maximum operating pressure 0 bar Maximum flow 0 l/min H5585 Overview of contents Contents age Features 1 Ordering details 2 referred types, 4 Function, section, symbol 5 echnical data Characteristic curves 7 General guidelines 7 Unit dimensions: hreaded connections 8 Unit dimensions: Cartridge valve 9 Unit dimensions: Manifold mounting 0, 11 Design tested safety valves type DBD../.., component series 1X, to directive 97/2/C (abbreviated to DGRL in any further text) Ordering details 12 Unit dimensions 12 echnical data 1 Characteristic curves Safety guidelines 4 to 1 Features As cartridge valve (cartridge) For threaded connections For manifold mounting Adjustment elements for pressure adjustment, optional: Sleeve with hexagon and protection cap Rotary knob / hand wheel Lockable rotary knob For information regarding the available spare parts see:

2 2/1 Bosch Rexroth AG Hydraulics ype DBD R 25402/05.0 Ordering details DBD 1X * ressure relief valve, direct operated Adjustment type for pressure adjustment Sleeve with hexagon and protective cap Nominal size Rotary knob 1) = H Hand wheel 2) = H Lockable rotary knob 1,) = A Nominal size = = 8 = 10 = 15 = 20 = 25 = 0 e.g. (connection) G1/4 G/8 G1/2 G/4 G1 G1 1/4 G1 1/2 = 10 Version As cartridge valve (cartridge) = K For threaded connections 4) For manifold mounting = Component series 10 to 19 (10 to 19: unchanged installation and connection dimensions) ressure stage ressure setting up to 25 bar = 25 ressure setting up to 50 bar = 50 ressure setting up to bar = ressure setting up to bar = ressure setting up to 15 bar = 15 ressure setting up to 400 bar = 400 ressure setting up to 0 bar = 0 Seal material NBR seals FKM seals (other seals on request) Attention! he compatibility of the seals and pressure fluid is to be taken into account! Design testing Without design testing Design tested safety valve to DGRL 97/2/C Further details in clear text = S = G = 1X = No code = V = No code = = Available 1) With nominal sizes 15 and 20 only the pressure stages 25, 50 or bar are available 2) Only available for pressure stages 25, 50 or bar. ) Key with Material No. R is included within the scope of supply. 4) Nominal sizes 8, 15, and 25 are not available with design tested and adjustment element S

3 R 25402/05.0 ype DBD Hydraulics Bosch Rexroth AG /1 referred types (readily available) ype DBDA K1X/25 DBDA K1X/50 DBDA K1X/ DBDA K1X/ DBDA K1X/15 DBDA K1X/400 DBDH K1X/25 DBDH K1X/50 DBDH K1X/ DBDH K1X/ DBDH K1X/15 DBDH K1X/400 DBDS K1X/25 DBDS K1X/50 DBDS K1X/ DBDS K1X/ DBDS K1X/15 DBDS K1X/400 DBDA 10 K1X/25 DBDA 10 K1X/50 DBDA 10 K1X/ DBDA 10 K1X/ DBDA 10 K1X/15 DBDA 10 K1X/400 DBDA 10 K1X/0 Material number R R R R R R R R R R R R R R R R R R R R R R R R R ype DBDH 0 K1X/25 DBDH 0 K1X/50 DBDS 0 K1X/25 DBDS 0 K1X/50 DBDS 0 K1X/ DBDS 0 K1X/ DBDS 0 K1X/15 DBDA G1X/25 DBDA G1X/50 DBDA G1X/ DBDA G1X/ DBDA G1X/15 DBDA G1X/400 DBDH G1X/25 DBDH G1X/50 DBDH G1X/ DBDH G1X/ DBDH G1X/15 DBDH G1X/400 DBDH 1X/25 DBDH 1X/50 DBDH 1X/ DBDH 1X/ DBDH 1X/15 DBDH 1X/400 Material number R R R R R R R R R R R R R R R R R R R R R R R R R DBDH 10 K1X/25 DBDH 10 K1X/50 DBDH 10 K1X/ DBDH 10 K1X/ DBDH 10 K1X/15 DBDH 10 K1X/400 DBDH 10 K1X/0 DBDS 10 K1X/25 DBDS 10 K1X/50 DBDS 10 K1X/ DBDS 10 K1X/ DBDS 10 K1X/15 DBDS 10 K1X/400 DBDS 10 K1X/0 DBDH 20 K1X/25 DBDH 20 K1X/50 DBDH 20 K1X/ R R R R R R R R R R R R R R R R R DBDS G1X/25 DBDS G1X/50 DBDS G1X/ DBDS G1X/ DBDS G1X/15 DBDS G1X/400 DBDS 1X/25 DBDS 1X/50 DBDS 1X/ DBDS 1X/ DBDS 1X/15 DBDS 1X/400 DBDH 10 G1X/50 DBDH 10 G1X/ DBDH 10 G1X/ DBDH 10 G1X/15 DBDH 10 G1X/0 R R R R R R R R R R R R R R R R R DBDS 20 K1X/25 DBDS 20 K1X/50 DBDS 20 K1X/ DBDS 20 K1X/15 DBDS 20 K1X/400 R R R R R Continued onto page 4

4 4/1 Bosch Rexroth AG Hydraulics ype DBD R 25402/05.0 referred types (readily available) ype Material number ype Material number DBDH 10 1X/ DBDH 10 1X/ DBDH 10 1X/15 DBDS 10 G1X/25 DBDS 10 G1X/50 DBDS 10 G1X/ DBDS 10 G1X/ DBDS 10 G1X/15 DBDS 10 G1X/400 DBDS 10 1X/25 DBDS 10 1X/ DBDS 10 1X/15 DBDS 10 1X/400 DBDS 15 G1X/ DBDS 15 G1X/ DBDS 15 G1X/15 DBDH 20 G1X/50 DBDH 20 G1X/ R R R R R R R R R R R R R R R R R R DBDS 20 G1X/25 DBDS 20 G1X/50 DBDS 20 G1X/ DBDS 20 G1X/ DBDS 20 G1X/15 DBDS 20 1X/ DBDS 20 1X/ DBDS 20 1X/15 DBDS 25 G1X/25 DBDS 25 G1X/ DBDS 25 G1X/ DBDS 25 G1X/15 DBDS 0 G1X/25 DBDS 0 G1X/50 DBDS 0 G1X/ DBDS 0 G1X/ DBDS 0 G1X/15 DBDS 0 1X/25 DBDS 0 1X/ DBDS 0 1X/15 R R R R R R R R R R R R R R R R R R R R Further preferred types and standard components can be found within the S (Standard rice List).

5 R 25402/05.0 ype DBD Hydraulics Bosch Rexroth AG 5/1 Function, section, symbol he DBD pressure relief valves are direct operated poppet seat valves. hey are used to limit the pressure in a hydraulic system. he valves mainly consist of sleeve (1), spring (2), poppet with damping spool () (pressure stages 25 to 400 bar) or ball (4) (pressure stage 0 bar) and adjustment element (5). he setting of the system pressure is infinitely variable via the adjustment element (5). he spring (2) pushes the poppet () or ball (4) onto the seat. he channel is connected to the system. he pressure present in the system is applied to the poppet area (or ball). If the pressure in channel rises above the value set at the spring (2), then the poppet () or the ball (4) opens against the spring (2). Now pressure fluid flows from channel into channel. he stroke of the poppet () is limited by a pin (). In order to obtain good pressure settings over the entire pressure range, the pressure range is split into 7 pressure stages. A pressure stage corresponds to a certain spring for a maximum operating pressure which may be set with it. ype DBDH..K1X/ ressure stages 25 to 400 bar (poppet seat valve) ype DBDH 10 K1X/ ressure stage 0 bar (ball seat valve, only NG10) Symbol

6 /1 Bosch Rexroth AG Hydraulics ype DBD R 25402/05.0 echnical data (for applications outside these parameters, please consult us!) General Nominal size NG and and and 0 Weight See pages 8, 9 and 11 Installation Hydraulic Maximum operating pressure Inlet bar Outlet bar Maximum flow (standard valve) see characteristic curves on page 7 ressure fluid Optional Ambient temperature range C 0 to +80 (NBR seals) 15 to +80 (FKM seals) he minimum housing material strength ressure fluid temperature range C 0 to +80 (for NBR seals) 15 to +80 (for FKM seals) Viscosity range mm 2 /s 10 to 800 Housing materials are to be so selected that adequate safety is ensured for all conceivable operating pressures (e.g. with reference to the compressive strength, thread strength and tightening torque). Mineral oil (HL, HL) to DIN ) ; fast bio-degradable pressure fluids to VDMA 2458 (also see R 90221); HG (rape seed oil) 1) ; HG (polyglycole) 2) ; HS (synthetic ester) 2) ; other pressure fluids on request Maximum permissible degree of pressure fluid contamination. Cleanliness class to ISO 440 (c) 1) Suitable for NBR and FKM seals 2) Only suitable for FKM seals ) he cleanliness class stated for the components must be adhered to in hydraulic systems. ffective filtration prevents faults from occurring and at the same time increases the component service life. For the selection of filters see data sheets R 50070, R 5007, R 50081, R 5008 and R Class 20/18/15 ) For deviating technical data for design tested safety valves see page 1.

7 R 25402/05.0 ype DBD Hydraulics Bosch Rexroth AG 7/1 Characteristic curves (measured with HL4, ϑ oil = 40 C ± 5 C) NG NG 8 and 10 Operating pressure in bar Flow in l/min Operating pressure in bar Flow in l/min 1 = Lowest settable pressure NG 15 and 20 NG 25 and Operating pressure in bar Operating pressure in bar Flow in l/min Flow in l/min Attention! he characteristic curves are valid for the output pressure = zero over the entire flow range and are measured without consideration of the housing pressure drop! he characteristic curves are only valid with the stated ambient and temperature conditions. It has to be taken into account that the characteristic curve is influenced by the changes in the boundry conditions! he characteristic curves refer to the given pressure stages (e.g. bar). he further the pressure setting value is from the nominal pressure stage (e.g. < bar), the greater the pressure increase with the flow. General guidelines Any hydraulic back pressures in port are added 1:1 to the response pressure set at the adjustment element of the valve. xample: he valve pressure setting resulting from the spring loading (os. 2 on page 5) p spring = bar Hydraulic back pressure in port : p hydraulic = 50 bar Response pressure = p spring + p hydraulic = 250 bar

8 8/1 Bosch Rexroth AG Hydraulics ype DBD R 25402/05.0 Unit dimensions: threaded connections (nominal dimensions in mm) ØD1 D2 B1 4 () H1 H2 L1 L2 D4; 1 2 L L5 L4 ØD 1.1 For types and dimensions of the adjustment element see page 8 L () B1 B2 1.1 Adjustment type S (example) Set screw with hexagon and protective cap; Internal hexagon (up to NG20) xternal hexagon (NG25 and 0) 2 Name plate 4 off threaded fixing holes 4 Connection port (), optional (e.g. for pressure measuring, dimensions see dimensions D2, for tightening torques see table below NG B1 B2 ØD1 D2 ØD D4 H1 H2 L1 L2 L L4 L5 L 1 Weight G1/4, M approx. 1,5 kg (8) (28) 4 (G/8) G1/2 9 M approx.,7 kg (15) (42) 47 (G/4) G1 9 M (4) 5, approx.,4 kg (25) (5) 5 (G1 1/4) G1 1/2 11 M , approx. 1,9 kg ightening torques M A in Nm for fittings 1) : lug (os. 4) lug G1/4 0 0 G/ G1/ G/4 80 G G1 1/ G1 1/ ) he tightening torques are standard values relating to the maximum operating pressue and the used of the torque wrench (tolerance 10%). ightening torques M A in Nm for cartridges 2) : ressue stage in bar Nom. size Up to Up to 400 Up to 0 50±5 80±5 10 ±5 150±10 ± ±10 00± ±20 500±0 2) he tightening torques are standard values with a friction co-efficient of approx and the use of a torque wrench.

9 R 25402/05.0 ype DBD Hydraulics Bosch Rexroth AG 9/1 Unit dimensions: Cartridge valve (nominal dimensions in mm) SW SW2 SW1; M A A/F 2A/F 1A/F; M A 4A/F SW4 A/F SW 2A/F SW2 1A/F; SW1; M A ϒ α1 L28 ØD19-0,2 1) ØD1 4 ØD1 ØD11 D14 ØD15 Rz 1 ØD17 ØD18 11 L22 ØD12 L2 L21 ØD11 L20 ØD12 L18 Ø2,5 L20 L18 L17 5A/F SW5 A/F SW 2A/F SW2 1A/F; SW1; M A A/F SW A/F SW L19 L19 L17 1A/F; SW1; M AA 2A/F SW2 1A/F; SW1; M A 1) Max. dim. L Cartridge valve Ø0,05 A 12 A L25 L2 L27 L29 L0 L1 Rz 1 0,5 x 45ϒ Ø0,1 A 1.1 Adjustment type S Set screw with hexagon and protective cap; Internal hexagon (up to NG20) xternal hexagon (NG0) 1.2 Adjustment type H Rotary knob (up to NG20) Hand wheel (NG0) 1. Adjustment type A Lockable rotary knob up to NG10 (NG20 to bar) 4 ort, optional about the circumference or at the bottom 5 ort, optional about the circumference ype code 7 ressure stage (stamped on) 8 Marking (adjustment of zero position after the valve has been screwed in; subsequent fixing of the ring is by a horizonal movement until it locks into place on the A/F plug) 9 Depth of fit 10 Locknut, tightening torque M A = Nm 11 Space required to remove the key 12 Minimum tensile strength of the housing material, see technical data on page NG ØD11 ØD12 ØD1 L17 L18 L19 L20 L21 L22 L2 L24 1A/F 2A/F A/F 4A/F 5A/F A/F M A Weight , see approx. 0,4 kg table on approx. 0,5 kg page approx. 1 kg approx. 2,2 kg Installation cavity NG D14 ØD15 ØD1 ØD17 ØD18 ØD19 L25 L2 L27 L28 L29 L0 L1 α1 M28 x 1,5 25 H ,9 +0,152 0, ,5±5, M5 x 1,5 2 H ,5 1,9 +0,12 0, ,5 52 7,5±7, M45 x 1,5 40 H ,9 +0,12 0, ,5±8, M0 x 2 55 H9 0 8,75 54,9 +0,174 0, ,5±11,

10 10/1 Bosch Rexroth AG Hydraulics ype DBD R 25402/05.0 Unit dimensions: manifold mounting (nominal dimensions in mm) () H2 ØD8; 2 ØD10 D9; H 5 15 Ø L1 L2 1.1 L8 L10 L7 L9 L11 L12 L12 L L4 ØD 12 L17 ØD11; () B1 B R1 B B4 L18 L L5 2 4 L1 L14 L15 L1 ØD5 D7; 5 ØD; 4 0,01/mm For types and dimensions of the adjustment elements see page 9 Rzmax 4 Required surface finish of the valve mounting surface 1.1 Adjustment type S (example) Set screw with hexagon and protective cap; Internal hexagon (up to NG20) xternal hexagon (NG0) 2 Name plate 4 off valve threaded fixing holes 4 Connection port, optional (e.g. for pressure measuring, for tightening torques see table 8) 12 Subplate (for type codes see page 11) 1 Valve contact area 14 anel cut-out 15 Locating pin (only for design tested safety valves) Due to strength (tensile) reasons only use the following valve fixing screws (separate order): 4 S.H.C.S. ISO flznnc-240h-l (friction co-efficient µ total = 0.09 to 0.14) Valve fixing screws to ISO 475 1) NG Dim. ensile strength class M A in Nm 2) Material No. M x ,5 R M8 x R M8 x R M10 x R ) As an alternative appropriatly specified bolts to DIN 912 can be used. 2) For tightening a torque wrench with a tolerance of 10% is to be used.

11 R 25402/05.0 ype DBD Hydraulics Bosch Rexroth AG 11/1 Unit dimensions: manifold mounting (nominal dimensions in mm) ressure relief valve NG B1 B2 ØD H2 L1 L2 L L4 L5 L L18 ort () Weight 45 0, G1/4 approx. 1,5 kg G1/2 approx.,7 kg , G/4 approx.,4 kg , G1 1/4 approx. 1,9 kg Subplates 1) NG ype B B4 ØD5 ØD D7 ØD8 D9 ØD10 ØD11 H G00/ , 11 M 25 G1/ (G01/01) G02/ , 11 M8 (25) 4 (G/8) G1/ (G0/01) G04/ M8 (42) 47 (G/4) G1 (15) (G05/01) G0/ M10 (5) 5 (G1 1/4) G1 1/ NG L7 L8 L9 L10 L11 L12 L1 L14 L15 L1 L R1 Weight , ,5 kg , ,5 40,5 48,5 72,5 80, (15) 1 9 (12) 15, kg (45) (94) , ,5 kg , , , ,5 102, ,5 22, kg 1) Attention! he stated subplates are not permitted for use with design tested safety valves in accordance to the pressure component directive 97/2/C!

12 12/1 Bosch Rexroth AG Hydraulics ype DBD R 25402/05.0 Ordering details: design tested safety valve, type DBD, component series 1X in accordance to the pressure component directive 97/2/C NG Designation Component identification 10 DBDS K1X/ DBDH K1X/ DBDS G1X/ DBDH G1X/ DBDS 1X/ DBDH 1X/ DBDS 10K1X/ DBDH 10K1X/ DBDS 10G1X/ DBDH 10G1X/ DBDS 101X/ DBDH 101X/ ÜV.SV F. α w.p. G ÜV.SV F. α w.p. G ÜV.SV. 90.4,5.F.0.p. 1) ressure in the type code must be entered by the customer; pressure adjustments 0 bar and in 5 bar steps are possible. Details are entered by the manufacturing plant 1) Component identification for DBD. 10.1X/...; 400 bar < p 0 bar NG Designation Component identification DBDS 20K1X/ DBDH 20K1X/ 20 0 DBDS 20G1X/ DBDH 20G1X/ DBDS 201X/ DBDH 201X/ DBDS 25G1X/ DBDH 25G1X/ DBDS 0K1X/ DBDH 0K1X/ DBDS 0G1X/ DBDH 0G1X/ DBDS 01X/ DBDH 01X/ ÜV.SV F.α w.p. ÜV.SV F.α w.p. Unit dimensions: valve panel cut-out for design tested safety valves, type DBD, component series 1X in accordance to the pressure component directive 97/2/C (nom. dimensions in mm) H2 R1 NG B1 B2 H1 H2 ØD1 H1 ØD2 H1 R , , , , ,5 0 29, H1 ØD2 B2 ØD1 Note! For the valve types DBDH.K..1X/.. the hand wheel has to be removed, subsequently refitted, before fitting the cartridge valve onto the valve panel. ØD1 B1

13 R 25402/05.0 ype DBD Hydraulics Bosch Rexroth AG 1/1 Deviating technical data: design tested safety valve, type DBD, component series 1X in accordance to the pressure component directive 97/2/C 1) Hydraulic Maximum flow See characteristic curves on pages 1 to 1 ressure fluid Mineral oil (HL, HL) to DIN and DIN ressure fluid temperature range C 20 to +0 (for NBR seals) 15 to +0 (for FKM seals) Viscosity value mm 2 /s 12 to 20 1) For applications outside these parameters, please consult us! Characteristic curves: design tested safety valves type DBD, component series 1X in accordance to the pressure component directive 97/2/C Note! Values which lie under the charateristic curve, in the dark area cannot be achieved with this valve! 0 Nominal size 10 Operating pressure in bar Nominal size Operating pressure in bar Flow in l/min Flow in l/min 140 Operating pressure in bar Nominal size 20 Nominal size 0 Operating pressure in bar Flow in l/min Flow in l/min

14 14/1 Bosch Rexroth AG Hydraulics ype DBD R 25402/05.0 Safety guidelines: design tested safety valves type DBD, component series 1X in accordance to the pressure component directive 97/2/C Before ordering a design tested safety valve, checks have to be carried out to ensure that at the required response pressure p the maximum permissible flow q Vmax of the safety valve is greater than the maximum possible flow of the system / accumulators. he appropriate regulations must be taken into account! In accordance to DGRL 97/2/C the system pressure must not increase, due to the flow, by more than 10 % of the set response pressure (see component identification). he maximum permissible flow q Vmax stated within the component identification must not be exceeded. he return lines from safety valves must vent in a safe manner. Fluid must not be able to gather in a venting system (see the AD0 - A2 information sheet). Application notes must be taken into account! he response value stated within the component identification is set in the manufacturing plant with a flow of 2 l/min. he maximum permissible flow stated with the component identification is valid for applications without back pressure in the return line (port ). he removal of the seal from a safety valve invalidates the DGRL approval! he requirements of the pressure component directive and the AD0-A2 information sheet must be taken into account! It is recommended that design tested safety valves are protected from unauthorised removal from the housing/block by wiring and sealing the cartridge to the housing/block (a hole is provided in the cartridge hexagon). Attention! he system pressure increases with an increase in flow by the value of the back pressure in the return line (port ). (the AD0 - A2 information sheet, point.. must be taken into account!) o ensure that the system pressure does not increase, due to the flow, by more than 10 % of the set response pressure, the permissible flow must be reduced in relation to the back pressure in the return line (port ) (see diagrams on pages 14 to 1). Maximum permissible flow q Vmax in relationship to the back pressure p in the return line ype DBD..1X/... p A in bar p in bar , , , Flow q Vmax in l/min Char. curves Response pressure p A in bar Characteritic curves for intermediate values can be obtained by interpolation. For further explanations see page 1

15 R 25402/05.0 ype DBD Hydraulics Bosch Rexroth AG 15/1 Safety guidelines: design tested safety valve, type DBD, component series 1X in accordance to the pressure component directive 97/2/C Maximum permissible flow q Vmax in relationship to the back pressure p in the return line ype DBD. 10.1X/... p A in bar p in bar , , , Flow q Vmax in l/min Char. curves Response pressure p A in bar Characteristic curves for intermediate values can be obtaineed by interpolation. For further explanations, see page 1 ype DBD. 20.1X/... p A in bar p in bar , Flow q Vmax in l/min Char. curves Response pressure p A in bar Characteristic curves for intermediate values can be obtaineed by interpolation. For further explanations, see page 1

16 1/1 Bosch Rexroth AG Hydraulics ype DBD R 25402/05.0 Safety guidelines: design tested safety valve, type DBD, component series 1X in accordance to the pressure component directive 97/2/C Maximum permissible flow q Vmax in relationship to the back pressure p in the return line ype DBD. 0.1X/... p A in bar p in bar 1, Char. curves Response pressure p A in bar Characteristic curves for intermediate values can be obtaineed by interpolation. For further explanations, see below Flow q Vmax in l/min p A = Response pressure in bar p = Maximum permissible back pressure in bar (the sum of all of the possible tank pressures; also see AD0 - A2 information sheet) q V max = Maximum permissible flow in l/min DGRL: p max = 10 % x p A (at q V = 0) An explanation of the diagram (example: type DBD, page 14): Given: Required: Solution: he flow for which safety has to be provided from the system/accumulator q Vmax = 20 l/min Safety valve set response pressure p A = 15 bar p permissible See arrows within the diagram on page 14 (type DBD ) p permissible (20 l/min; 15 bar) = 19,5 bar Bosch Rexroth AG Hydraulics Zum isengießer Lohr am Main, Germany elefon +49 (0) 9 52 / 18-0 elefax +49 (0) 9 52 / documentation@boschrexroth.de his document, as well as the data, specifications and other informations set forth in it, are the exclusive property of Bosch Rexroth AG. Without their consent it may not be reproduced or given to third parties. he 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. he 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. Subject to change.