| Media: | Oil |
|---|---|
| Temperature: | Ordinary Temperature |
| Actuator: | Pneumatic |
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Pressure valves type DB..K.. are pilot-operated pressure relief valves for block design installation. They are used for system pressure limitation. The system pressure can be set via the adjustment type (4).
In the initial position the valves are closed. The pressure in main port 1 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 main port 1 exceeds the value set at spring (5), the pilot poppet (6) opens. Hydraulic fluid flows from the spring-loaded side of the spool (1) via nozzle (3) and channel (7) into the main port 3. The resulting pressure drop moves the spool (1) and thus opens the connection from main port 1 to 2 while maintaining the pressure set at spring (5).
Die pilot oil return from the two spring chambers is effected externally, via main port 3.
Notice!
Counter pressures (main port 3) add up to the set pressure.
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01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
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DB |
K |
- |
4X |
/ |
Y |
V |
* |
|
01 |
Pressure relief valve, pilot controlled |
DB |
|
02 |
Size 6 |
6 |
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Size 10 |
10 |
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03 |
Cartridge valve |
K |
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Adjustment type |
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04 |
Rotary knob |
1 |
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Sleeve with hexagon and protective cap |
2 |
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Lockable rotary knob with scale |
3 1) |
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Rotary knob with scale |
7 |
|
|
05 |
Component series 40 … 49 (40 … 49: unchanged installation and mounting dimensions) |
4X |
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Pressure rating |
||
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06 |
Set pressure up to 50 bar |
50 |
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Set pressure up to 100 bar |
100 |
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Set pressure up to 200 bar |
200 |
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Set pressure up to 315 bar |
315 |
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|
07 |
Internal pilot oil supply, external pilot oil return |
Y |
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Seal material |
||
|
08 |
FKM seals (other seals upon request) |
V |
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Observe compatibility of seals with hydraulic fluid used. |
||
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09 |
Further details in the plain text |
* |
| 1) H-key with material no. R900008158 is included in the scope of delivery. |
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Size |
6 | 10 | |
|
Weight (approx.) |
kg |
0.15 | 0.2 |
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Installation position |
any | ||
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Ambient temperature range |
°C |
-20 … +80 | |
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Size |
6 | 10 | ||
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Maximum operating pressure 1) |
Port P |
bar |
315 | |
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Maximum adm. counter pressure 1) |
Port T |
bar |
315 | |
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Port Y |
bar |
315 | ||
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Maximum set pressure |
Port P |
bar |
50 100 200 315 |
|
|
Maximum flow |
l/min |
60 | 100 | |
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Hydraulic fluid |
see table | |||
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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) | Attention! The maximum operating pressure is added up from the set pressure and the return flow pressure. |
| 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 |
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Hydraulic fluid |
Classification |
Suitable sealing materials |
Standards |
|
|
Mineral oil |
HL, HLP |
FKM, NBR |
DIN 51524 |
|
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Bio-degradable |
Insoluble in water |
HEES (synthetic esters) |
FKM |
VDMA 24568 |
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HETG (rape seed oil) |
FKM, NBR |
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Soluble in water |
HEPG (polyglycols) |
FKM |
VDMA 24568 |
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Other hydraulic fluids on request |
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| Quantity(pieces) | 1 - 5 | >5 |
| Lead time (days) | 10 | To be negotiated |
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