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Description
- Size 4
- Component series 1X
- Maximum operating pressure 420 bar
- Maximum flow 20 l/min
Features
- Screw-in cartridge valve
- For applications with especially high tightness requirements
- Leakage-free up to a maximum of 80 % of the set cracking pressure
- 2 adjustment types, optionally:
• Grub screw with internal hexagon
• Hand wheel
Product description
The pressure valve type DBD...SO156 is a direct operated pressure relief valve for the installation in block designs.
It is used for applications with especially high sealing requirements for limiting a system pressure.
The system pressure can be set via the adjustment type (4).
The valve is closed in initial position. Via control line (2) and poppet (1), the pressure in the main port ① acts on the spring plate (5). If the pressure in the main port ① rises above the value set at the compression spring (3), the poppet (1) opens and the hydraulic fluid flows into the main port ②
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | |
| DBD | 4 | K | 1X | / | V | S0156 | * |
| 01 | Pressure relief valve, direct controlled | DBD |
| Adjustment type | ||
| 02 | Grub screw with internal hexagon | S |
| Hand wheel | H | |
| 03 | Size 4 | 4 |
| 04 | Cartridge valve | K |
| 05 | Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions) | 1X |
| Pressure rating | ||
| 06 | 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 420 bar | 420 | |
| Seal material | ||
| 07 | set to cracking pressure | – |
| set and sealed to cracking pressure | P | |
| Cracking pressure | ||
| 08 | Cracking pressure 90 +5 bar | e.g. 090 |
| Seal material | ||
| 09 | FKM seals | V |
| Observe compatibility of seals with hydraulic fluid used. (Other seals upon request) | ||
| 10 | SO156 | |
| 11 | Further details in the plain text | * |
Technical data
hydraulic
| Size | 4 | |
| Maximum operating pressure | bar | 420 |
| Maximum flow | l/min | 20 |
| Hydraulic fluid | see table | |
| Hydraulic fluid temperature range | °C | -20 … +80 |
| Viscosity range | mm²/s | 20 … 200 |
| Maximum admissible degree of contamination of the hydraulic fluid 1) | Class 20/18/15 according to ISO 4406 (c) | |
| 1) | 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. |
general
| Size | 4 | |
| Weight (approx.) | kg | 0.05 |
| Installation position | any | |
| Ambient temperature range | °C | -20 … +80 |
(For applications outside these values, please consult us!)
| Hydraulic fluid | Classification | Suitable sealing materials | Standards | |
| Mineral oil | HL, HLP | FKM, NBR | DIN 51524 | |
| Bio-degradable | Insoluble in water | HEES (synthetic esters) | FKM | VDMA 24568 |
| HETG (rape seed oil) | FKM, NBR | |||
| Soluble in water | HEPG (polyglycols) | FKM | VDMA 24568 | |
| Other hydraulic fluids on request | ||||
Diagrams/characteristic curves
(measured with HLP46, ϑOil = 40 ±5 °C)
pE-qV characteristic curves
Δp-qV characteristic curves
The characteristic curves apply for output pressure = 0 in the entire flow range!
Definition cracking pressure:
Pressure in bar with qV = 0.95 +0.05 l/min
Symbols/Circuit diagrams
| ➀ | Main port 1 (P) |
| ➁ | Main port 2 (T) |
Dimensions
Dimensions in mm
| 1.1 | Adjustment type “S”, internal hexagon SW5 |
| 1.2 | Adjustment type “H”, hand wheel |
| 2 | Lock nut SW17 |
| 3 | Hexagon SW17, tightening torque during screw-in MA = 23±2 Nm |
| 4 | embossed type designation |
| ➀ | Main port 1 (P) |
| ➁ | Main port 2 (T) |
| LS | Location shoulder |
| ➀ | Main port 1 (P) |
| ➁ | Main port 2 (T) |
| LS | Location shoulder |
| Tolerance for all angles ± 0.5 ° | |
| Standards: | |
| Workpiece edges | DIN ISO 13715 |
| Form and position tolerance | DIN EN ISO 1101 |
| General tolerances for metal-cutting procedures | DIN ISO 2768-mK |
| Tolerance | DIN EN ISO 1302 |
| Surface condition | DIN EN ISO 1302 |
Dimensions in mm
Downloads
 | Pressure relief valve, direct operated Data Sheet | RE25710-D | 2014-06-01 | English | PDF | 543k Product Groups: Direct operated Type DBD…SO156 |
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