Bosch REXROTH DBD Technical Manual Download Page 7 | Manualshive

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Pressure relief valve

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DBD

7/12

RD 25710, edition: 2016-07,

Bosch Rexroth AG

Mounting cavity:

R/DBD . 4K; 2 main ports; thread M14 x 1

(dimensions in mm)

1)

Depth for moving parts

2)

All seal ring insertion faces are rounded and free of burrs

3)

With countersink

4)

Visual inspection

①

= Main port 1 (P)

②

= Main port 2 (T), can optionally be arranged at the

circumference
Tolerance for all angles ±0.5°

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Summary of Contents for REXROTH DBD

Page 1: ... Technical data 4 Characteristic curves 5 General information 5 Dimensions 6 Mounting cavity 7 Type examination tested safety valves type DBD K according to Pressure Equipment Directive 2014 68 EU in the following shortly PED Ordering code 8 Deviating technical data 8 Safety instructions 9 Characteristic curves 9 10 Further information 11 Size 4 Component series 1X Maximum operating pressure 500 b...

Page 2: ... 10 19 10 19 unchanged installation and connection dimensions 1X Pressure rating 06 Set pressure up to 25 bar 25 Set pressure up to 50 bar 50 Set pressure up to 100 bar 100 Set pressure up to 200 bar 200 Set pressure up to 315 bar 315 Set pressure up to 350 bar 350 Set pressure up to 420 bar 420 Set pressure up to 500 bar 500 Seal material 07 FKM seals V Observe compatibility of seals with hydraul...

Page 3: ...limiting a system pressure The system pressure can be set via the adjustment type 5 In the initial position the valve is closed Via control line 1 and poppet 2 the pressure in the main port acts on the spring plate 3 If the pressure in the main port rises above the value set at the compression spring 4 the poppet 2 opens and the hydraulic fluid flows into the main port Type DBDS 4 K1X V 1 Main por...

Page 4: ...ystems Effective filtration prevents faults and simultaneously increases the life cycle of the components For the selection of the filters see www boschrexroth com filter Hydraulic fluid Classification Suitable sealing materials Standards Data sheet Mineral oils HL HLP NBR FKM DIN 51524 90220 Bio degradable Insoluble in water HETG FKM ISO 15380 90221 HEES FKM Soluble in water HEPG FKM ISO 15380 Im...

Page 5: ... characteristic curves apply to output pressure zero in the entire volume flow range and were measured without housing resistance Hydraulic counter pressures in the main port T add 1 1 to the response pressure of the valve set at the adjustment Example Pressure adjustment of the valve due to spring preload item 4 on page 3 pspring 200 bar Hydraulic counter pressure in the main port T phydraulic 50...

Page 6: ...6 07 1 1 Adjustment type S internal hexagon SW5 1 2 Adjustment type H hand wheel 2 Lock nut SW17 tightening torque MA 10 5 Nm 3 Hexagon SW17 tightening torque when screwing in MA 23 2 Nm 4 Embossed type designation Main port 1 P Main port 2 T Dimensions dimensions in mm ...

Page 7: ...ity R DBD 4K 2 main ports thread M14 x 1 dimensions in mm 1 Depth for moving parts 2 All seal ring insertion faces are rounded and free of burrs 3 With countersink 4 Visual inspection Main port 1 P Main port 2 T can optionally be arranged at the circumference Tolerance for all angles 0 5 ...

Page 8: ...thout the need of removing the lead seal Pressure in the type designation is to be entered by the customer pressure adjustment 60 bar and possible in 5 bar steps Information is entered at the factory 1 Component series 1X according to the Pressure Equipment Directive 2014 68 EU 1 Component series 1X according to Pressure Equipment Directive 2014 68 EU For applications outside these parameters plea...

Page 9: ...asing flow Observe the data sheet AD 2000 A 2 point 6 3 To ensure that this increase in system pressure caused by the flow does not exceed the value of 10 of the set response pressure the admissible flow has to be reduced dependent on the counter pressure in the discharge line port T see diagrams on page 9 and 10 1 Component series 1X according to the Pressure Equipment Directive 2014 68 EU Charac...

Page 10: ...es pA pA Response pressure in bar pT Maximum counter pressure in the discharge line port T in bar qVmax Maximum flow in l min Determination of the maximum counter pressure Example with already existing characteristic curve Flow of the system accumulator to be secured qVmax 5 l min Safety valve set to pA 500 bar Read off the maximum counter pressure pT of approx 36 bar from the diagram see arrows c...

Page 11: ... sheet 90220 Environmentally compatible hydraulic fluids Data sheet 90221 Flame resistant water free hydraulic fluids Data sheet 90222 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 bosc...

Page 12: ... 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 verif...

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