4/12 DBD | Pressure relief valve
Bosch Rexroth AG, RE 25710, edition: 2016-07
hydraulic
Maximum operating pressure ▶ Input bar 500
▶ Output bar 315 (50 bar at set pressure 500 bar)
Maximum set pressure bar 25; 50; 100; 200; 315; 350; 420; 500
Maximum flow l/min 20
Hydraulic fluid See table below
Hydraulic fluid temperature range °C –20 … +80
Viscosity range mm
2
/s 10 … 800
Maximum admissible degree of contamination of the hydraulic fluid;
Cleanliness class according to ISO 4406 (c)
Class 20/18/15
1)
general
Weight kg Approx. 0.3
Installation position Any
Ambient temperature range °C –20 … +80
Technical data
(For applications outside these parameters, please consult us!)
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.
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
ISO15380
90221HEES FKM
▶ Soluble in water HEPG FKM ISO15380
Important notes on hydraulic fluids:
▶ For more information and data on the use of other hydraulic
fluids, please refer to the data sheets above or contact us.
▶ There may be limitations regarding the technical valve data
(temperature, pressure range, life cycle, maintenance intervals,
etc.).
▶ The ignition temperature of the hydraulic fluid used must be 50K
higher than the maximum solenoid surface temperature.
▶ Bio-degradable and flame-resistant: If this hydraulic fluid is
used, small amounts of dissolved zinc may get into the hydraulic
system.
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