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Pressure relief valve,
direct operated
Type DBD
K4942-1
Features
▶ Screw-in cartridge valve
▶ 8 pressure ratings
▶ 2 adjustment types, optionally:
- Grub screw with internal hexagon
- Hand wheel
▶ Size 4
▶ Component series 1X
▶ Maximum operating pressure 500 bar
▶ Maximum flow 20 l/min
Contents
Features
Contents
according to Pressure Equipment Directive 2014/68/EU
(in the following shortly PED)
Ordering code
RD 25710, edition: 2016-07, Bosch Rexroth AG
RE 25710
Edition: 2016-07
Replaces: 03.13
1
1
2
3
4
5
5
6
7
8
8
9
9, 10
11
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Table of Contents
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Summary of Contents for Bosch REXROTH DBD
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Page 1: Table Of Contents
Dimensions Mounting cavity Type-examination tested safety valves type DBD…K according to Pressure Equipment Directive 2014/68/EU (in the following shortly PED) Ordering code Deviating technical data Safety instructions Characteristic curves 9, 10 Further information RD 25710, edition: 2016-07, Bosch Rexroth AG... -
Page 2: Ordering Code
Type-examination tested safety valve according to PED 2014/68/EU (see ordering code on page8) For further information, see the plain text Notice: Preferred types and standard units are contained in the EPS (standard price list). Bosch Rexroth AG, RE 25710, edition: 2016-07... -
Page 3: Function, Section, Symbol
(4), type (5). the poppet (2) opens and the hydraulic fluid flows into the main port ②. = Main port 1 (P) = Main port 2 (T) Type DBDS 4 K1X/.V RD 25710, edition: 2016-07, Bosch Rexroth AG... -
Page 4: Technical Data
The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter. Bosch Rexroth AG, RE 25710, edition: 2016-07... -
Page 5: Characteristic Curves
(item 4 on page 3) p = 200 bar spring ▶ Hydraulic counter pressure in the main port ② (T): = 50 bar hydraulic ⇒ Response pressure = p = 250 bar spring hydraulic RD 25710, edition: 2016-07, Bosch Rexroth AG... -
Page 6: Dimensions
2 Lock nut SW17, tightening torque M =10+ 3 Hexagon SW17, tightening torque when screwing in = 23 ±2 4 Embossed type designation ① = Main port 1 (P) ② = Main port 2 (T) Bosch Rexroth AG, RE 25710, edition: 2016-07... -
Page 7: Mounting Cavity
② = Main port 2 (T), can optionally be arranged at the All seal ring insertion faces are rounded and free of burrs circumference With countersink Tolerance for all angles ±0.5° Visual inspection RD 25710, edition: 2016-07, Bosch Rexroth AG... -
Page 8: Type-Examination Tested Safety Valves Type Dbd
Hydraulic oils HL and HLP are suitable for safety valves with FKM seals. Hydraulic fluid temperature range °C –10 … +60 Viscosity range /s 12 … 230 Component series 1X, according to Pressure Equipment Directive 2014/68/EU (For applications outside these parameters, please consult us!) Bosch Rexroth AG, RE 25710, edition: 2016-07... -
Page 9: Safety Instructions
4. Mark the system flow to be secured at the q axis. Vmax 5. Read off the maximum counter pressure for this value using the line at the p axis drawn before. RD 25710, edition: 2016-07, Bosch Rexroth AG... -
Page 10: Characteristic Curves
Vmax Maximum flow in l/min Safety valve set to: p = 500 bar. Vmax Read off the maximum counter pressure p of approx. 36 bar from the diagram (see arrows, characteristic curve 7). Bosch Rexroth AG, RE 25710, edition: 2016-07... -
Page 11: Further Information
▶ Flame-resistant hydraulic fluids - containing water (HFAE, HFAS, HFB, HFC) Data sheet 90223 ▶ Reliability characteristics according to EN ISO 13849 Data sheet 08012 ▶ Hydraulic valves for industrial applications Operating instructions 07600-B ▶ Selection of the filters www.boschrexroth.com/filter RD 25710, edition: 2016-07, Bosch Rexroth AG... -
Page 12: Pressure Relief Valve | Dbd
© This document, as well as the data, specifications and other information set Hydraulics forth in it, are the exclusive property of Bosch Rexroth AG. It may not be Zum Eisengießer 1 reproduced or given to third parties without its consent.