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Description
- Size 6
- Component series 4X
- Maximum operating pressure 315 bar
- Maximum flow 60 l/min
Features
- Sandwich plate valve
- Porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole)
- 4 pressure ratings
- 5 circuit options
- With 1 or 2 pressure valve cartridges
- 4 adjustment types for pressure adjustment, optionally
• Rotary knob
• Sleeve with hexagon and protective cap
• Lockable rotary knob with scale
• Rotary knob with scale - Corrosion-protected design
Product description
Pressure valves of type ZDB and Z2DB are pilot-operated pressure relief valves in sandwich plate design.
They are used for limiting a system pressure.
The valves basically consist of the housing (7) and one or two pressure valve cartridges.
The system pressure can be set via the adjustment type (4).
Example version "VA":
In the initial position the valves are closed. The pressure in channel A acts on the spool (1). At the same time, pressure is applied to the spring-loaded side of the spool (1) via nozzle (2) and to the pilot poppet (6) via nozzle (3). If the pressure in channel A exceeds the value set at the spring (5), the pilot poppet (6) opens.
Hydraulic fluid flows from the spring-loaded side of the spool (1), nozzle (3), channel (8) into channel T. The resulting pressure drop moves the spool (1) and thus opens the connection from A to T while maintaining the pressure set at spring (5).
Die pilot oil drain from the two spring chambers is effected externally, via channel T.
Type ZDB 6 VA2-...
➀ = component side
➁ = plate side
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | ||
| Z | DB | 6 | – | 4X | / | * |
| 01 | Sandwich plate | Z |
| 02 | 1 pressure valve cartridge (only with version “VA”, “VB” and “VP”) | no code |
| 2 pressure valve cartridges (only with version “VC” and “VD”) | 2 | |
| 03 | Pressure relief valve | DB |
| 04 | Size 6 | 6 |
| Relief function from – to: | ||
| 05 | A – T | VA |
| P – T | VP | |
| B – T | VB | |
| A – T and B – T | VC | |
| A – B and B – A | VD | |
| Adjustment type for pressure adjustment | ||
| 06 | Rotary knob | 1 |
| Sleeve with hexagon and protective cap | 2 | |
| Lockable rotary knob with scale | 31) | |
| Rotary knob with scale | 7 | |
| 07 | Component series 40 … 49 (40 … 49: unchanged installation and mounting dimensions) | 4X |
| Pressure rating | ||
| 08 | 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 | |
| Corrosion resistance | ||
| 09 | None | no code |
| Improved corrosion protection (240 h salt spray test according to EN ISO 9227) | J3 2) | |
| High corrosion protection (720 h salt spray test according to EN ISO 9227) | J5 2) | |
| Seal material | ||
| 10 | NBR seals | no code |
| FKM seals | V | |
| Observe compatibility of seals with hydraulic fluid used. (Other seals upon request) | ||
| 11 | Without locating hole | no code |
| With locating hole | /60 3) | |
| 12 | Further details in the plain text | * |
| 1) | Key with material no. R900008158 is included in the scope of delivery. |
| 2) | Only with adjustment type "2", however without protective cap |
| 3) | Locking pin ISO 8752-3x8-St, material no. R900005694 (separate order) |
Technical data
general
| Size | 6 | ||
| Weight (approx.) | Type ZDB 6 | kg | 1 |
| Type Z2DB 6 | kg | 1.2 | |
| Installation position | any | ||
| Ambient temperature range | °C | -20 … +80 | |
hydraulic
| Size | 6 | ||
| Maximum operating pressure | bar | 315 | |
| Maximum counter pressure 1) | bar | 315 | |
| Maximum set pressure | bar | 50 100 200 315 | |
| Maximum flow | l/min | 60 | |
| Hydraulic fluid | see table | ||
| Hydraulic fluid temperature range | °C | -20 … +80 | |
| Viscosity range | mm²/s | 10 … 800 | |
| Maximum admissible degree of contamination of the hydraulic fluid 2) | Class 20/18/15 according to ISO 4406 (c) | ||
| 1) | Observe the maximum tank pressure of the subplate-mounted valve/directional valve |
| 2) | 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. |
| Hydraulic fluid | Classification | Suitable sealing materials | Standards | Data sheet | |
| Mineral oil | HL, HLP | FKM, NBR | DIN 51524 | 90220 | |
| Bio-degradable 1) | Insoluble in water | HETG | FKM | ISO 15380 | 90221 |
| HEES | FKM | ||||
| Soluble in water | HEPG | FKM | ISO 15380 | ||
| Flame-resistant | Water-free | HFDU (glycol base) | FKM | ISO 12922 | 90222 |
| HFDU (ester base) 1) | FKM | ||||
| HFDR | FKM | ||||
| Containing water | HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620) | NBR | ISO 12922 | 90223 | |
| Important information on hydraulic fluids:
| |||||
| 1) | Not recommended for corrosion-protected version "J3" and "J5" (contains zinc) |
(For applications outside these values, please consult us!)
Diagrams/characteristic curves
(measured with HLP46, ϑOil = 40 ±5 °C)
pE-qV characteristic curves
pE min-qV characteristic curves
Notice:
The characteristic curves apply to the pressure at the valve output p = 0 bar across the entire flow range.
Symbols/Circuit diagrams
Type ZDB 6 VA...
Type ZDB 6 VB...
Type ZDB 6 VP...
Type Z2DB 6 VC...
Type Z2DB 6 VD...
➀ = component side
➁ = plate side
Dimensions
Version "VA"
(dimensions im mm)
Dimensions in mm
| 1 | Name plate |
| 2 | Adjustment type "1" |
| 3 | Adjustment type "2" (with version "J3" and "J5" without protective cap) |
| 4 | Adjustment type "3" |
| 5 | Adjustment type "7" |
| 6 | Dimensions required to remove the key |
| 7 | Valve mounting bores |
| 8 | Lock nut SW24, tightening torque MA = 10+5 Nm |
| 9 | Hexagon SW10 |
| 10 | Identical seal rings for ports A, B, P and T (plate side) |
| 11 | Hexagon SW24, tightening torque MA = 50 Nm |
| 12 | plate side – Porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø3 x 5 mm deep for locking pin ISO 8752-3x8-St, material no. R900005694, separate order) |
| 13 | component side – porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø4 x 4 mm deep) |
Version "VB" and "VP"
(dimensions im mm)
Dimensions in mm
| 1 | Name plate |
| 2 | Adjustment type "1" |
| 3 | Adjustment type "2" (with version "J3" and "J5" without protective cap) |
| 4 | Adjustment type "3" |
| 5 | Adjustment type "7" |
| 6 | Dimensions required to remove the key |
| 7 | Valve mounting bores |
| 8 | Lock nut SW24, tightening torque MA = 10+5 Nm |
| 9 | Hexagon SW10 |
| 10 | Identical seal rings for ports A, B, P and T (plate side) |
| 11 | Hexagon SW24, tightening torque MA = 50 Nm |
| 12 | plate side – Porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø3 x 5 mm deep for locking pin ISO 8752-3x8-St, material no. R900005694, separate order) |
| 13 | component side – porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø4 x 4 mm deep) |
Version "VC" and "VD"
(dimensions im mm)
Dimensions in mm
| 1 | Name plate |
| 2 | Adjustment type "1" |
| 3 | Adjustment type "2" (with version "J3" and "J5" without protective cap) |
| 4 | Adjustment type "3" |
| 5 | Adjustment type "7" |
| 6 | Dimensions required to remove the key |
| 7 | Valve mounting bores |
| 8 | Lock nut SW24, tightening torque MA = 10+5 Nm |
| 9 | Hexagon SW10 |
| 10 | Identical seal rings for ports A, B, P and T (plate side) |
| 11 | Hexagon SW24, tightening torque MA = 50 Nm |
| 12 | plate side – Porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø3 x 5 mm deep for locking pin ISO 8752-3x8-St, material no. R900005694, separate order) |
| 13 | component side – porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø4 x 4 mm deep) |
| 14.1 | Version “VC” |
| 14.2 | Version “VD” |
Valve mounting screws (separate order)
- Version „J3“
4 hexagon socket head cap screws ISO 4762 - M5 - 10.9-CM-Fe-ZnNi-5-Cn-T0-H-B
friction coefficient μtotal = 0,09 … 0,14
tightening torque MA = 7,4 Nm ± 10 %
- Version „J5“
4 hexagon socket head cap screws ISO 4762 - M5 - 10.9-CM-Fe-ZnNi-8-Cn-T0-H-B
friction coefficient μtotal = 0,09 … 0,14
tightening torque MA = 7,4 Nm ± 10 %
- Without corrosion protection
4 hexagon socket head cap screws ISO 4762 - M5 - 10.9
friction coefficient μtotal = 0,12 … 0,17
tightening torque MA = 8,1 Nm ± 10 %
Downloads
 | Pressure relief valve, pilot operated Data Sheet | RE25751 | 2016-12-01 | English | PDF | 235k Product Groups: Pilot operated Type ZDB and Z2DB |
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