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Description
- Size 10
- Component series 5X
- Maximum operating pressure 210 bar
- Maximum flow 80 l/min
Features
- Sandwich plate valve
- Porting pattern according to ISO 4401-05-04-0-05
- 4 pressure ratings
- 4 optional adjustment types:• Rotary knob• Sleeve with hexagon and protective cap• Lockable rotary knob with scale• Rotary knob with scale
- Check valve, optional (version "A")
- Pressure reduction in channel A, B or channel P
- Corrosion-protected design
Product description
The valve type ZDR is a direct operated pressure reducing valve in sandwich plate design with pressure limitation of the secondary circuit. It is used to reduce the system pressure.
The pressure reducing valve basically comprises housing (1), control spool (2), compression spring (3), adjustment type (4) and an optional check valve.
The secondary pressure is set via the adjustment type (4).
Version “A”
The valve is open in initial position. Hydraulic fluid can flow from channel A➀ to channel A➁ without restrictions. The pressure in channel A➁ is simultaneously applied via the control line (5) at the piston area opposite the compression spring (3). If the pressure in channel A➁ exceeds the value set at the compression spring (3), the control spool (2) is pushed against the compression spring (3) to control position and keeps the set pressure in channel A➁ at a constant level.
Control signal and pilot oil are supplied internally via the control line (5) from channel A➁.
If the pressure in channel A➁ increases further due to an external force effect at the actuator, it pushes the control spool (2) even further against the compression spring (3).
In this way, channel A➁ is connected to the tank (channel TB) via the control edge (6) at the control spool (2) and the housing (1). So much hydraulic fluid is discharged into the tank, that the pressure does not increase any further.
The leakage oil drain from the spring chamber (7) is always effected externally via channel TA.
A pressure gauge connection (8) allows for the control of the secondary pressure at the valve.
A check valve can be used for free flow back from channel A➁ to A➀ with version “A”.
Versions “P” and “B”
For version “P”, the pressure reduction is effected in channel P➀. Control signal and pilot oil are supplied internally from channel P➀.
For version “B”, the pressure is reduced in channel P➀; but the pilot oil is extracted from channel B. If the directional valve is in spool position P to A, the pressure in channel B may not exceed the set secondary pressure. Otherwise, there is pressure reduction in channel A.
Notice:
- If used without directional valve, channels TA and TB are connected to each other (e.g. in the cover plate).
- During set-up of a directional seat valve NG 10, a sandwich plate type HSZ10A078-3X/M00 (material no. R900537264) has to be used.
Type ZDR 10 DA …
| ① | component side |
| ② | plate side |
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | ||
| Z | DR | 10 | D | - | 5X | / | Y | * |
| 01 | Sandwich plate valve | Z |
| 02 | Pressure reducing valve | DR |
| 03 | Size 10 | 10 |
| 04 | Direct operated | D |
| 05 | Pressure reduction in channel A➁ | A |
| Pressure reduction in channel P➁ (pilot oil supply from channel B) | B | |
| Pressure reduction in channel P➁ | P | |
| Adjustment type | ||
| 06 | Rotary knob | 1 |
| Sleeve with hexagon and protective cap ("J3" version without protective cap) | 2 | |
| Lockable rotary knob with scale | 3 1) | |
| Rotary knob with scale | 7 | |
| 07 | Component series 50 … 59 (50 … 59: unchanged installation and connection dimensions) | 5X |
| 08 | Secondary pressure up to 25 bar | 25 |
| Secondary pressure up to 75 bar | 75 | |
| Secondary pressure up to 150 bar | 150 | |
| Secondary pressure 210 bar | 210 | |
| 09 | Internal pilot oil supply, external pilot oil return | Y |
| 10 | With check valve (only version "A") | no code |
| Without check valve | M | |
| Corrosion resistance | ||
| 11 | None | no code |
| Improved corrosion protection (240 h salt spray test according to EN ISO 9227) (only version "1" and "2") | J3 | |
| Seal material (observe compatibility of seals with hydraulic fluid used, see "Technical data") | ||
| 12 | NBR seals | no code |
| FKM seals | V | |
| 13 | Further details in the plain text | * |
| 1) | H-Key with material no. R900008158 is included in the scope of delivery. |
Notice:
For port X and Y bored according to ISO 4401-05-05-0-05 (e.g. for pilot operated directional valve size 10), version "SO30" at the end of the order code applies.
Technical data
general
| Size | 10 | ||
| Weight (approx.) | kg | 2.8 | |
| Installation position | any | ||
| Ambient temperature range | NBR seals | °C | -30 … +80 |
| FKM seal | °C | -20 … +80 | |
hydraulic
| Size | 10 | ||
| Maximum operating pressure | Inlet | bar | 315 |
| Maximum secondary pressure | Outlet | bar | 25 75 150 210 |
| Maximum counter pressure | Port T | bar | 160 |
| Maximum flow | l/min | 80 | |
| Hydraulic fluid | see table "Hydraulic fluid" | ||
| Hydraulic fluid temperature range | NBR seals | °C | -30 … +80 |
| FKM seal | °C | -20 … +80 | |
| Viscosity range | mm²/s | 10 … 800 | |
| Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1) | Class 20/18/15 | ||
| 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. |
(For applications outside these values, please consult us!)
| Hydraulic fluid | Classification | Suitable sealing materials | Standards | Data sheet | |
| Mineral oils | HL, HLP | NBR, FKM | DIN?51524 | 90220 | |
| Bio-degradable | Insoluble in water | HETG | NBR, 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) | FKM | ||||
| HFDR | FKM | ||||
| Containing water | HFC (Fuchs: Hydrotherm 46M, Renosafe 500;?Petrofer: Ultra Safe 620;?Houghton: Safe 620;?Union: Carbide HP5046) | NBR | ISO?12922 | 90223 | |
| Important information on hydraulic fluids:
| |||||
Diagrams/characteristic curves
(measured with HLP46, ϑOil = 40 ±5 °C)
pA-qV characteristic curves
Version "A"
pA-qV characteristic curves
Version "B" and "P"
Notice:
The curve development is maintained if the pressure is set lower according to the pressure rating.
Δpmin-qV characteristic curves
Δpmin-qV characteristic curves
Δp-qV characteristic curves
Notice:
The characteristic curves apply to an output pressure pT =0 bar in the entire flow range.
Symbols/Circuit diagrams
Version "P...YM"
Version "A...YM"
Version "B…YM"
Version "A...Y"
Notice:
Deviating from ISO 4401, port T is called TA, port T1 is called TB.
| ① | component side |
| ② | plate side |
Dimensions
load errorDownloads
 | Pressure reducing valve, direct operated Data Sheet | RE26585 | 2019-06-01 | English | PDF | 701k Product Groups: Direct operated Type ZDR 10 D |
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