Description Size 2 Component series 2X Maximum operating pressure 420 bar Maximum flow 2 l/min Features Screw-in cartridge valve 6 pressure ratings 4 adjustment types, optionally: • Hexagon with protective cap • Rotary knob with scale • Lockable rotary knob with scale • Hand wheel Product description Function, section, symbol Pressure valves of type DBD .. K are direct operated pressure relief valves to be installed in block designs. They are used for system pressure limitation. The system pressure can be set via the adjustment type (5). In the initial position the valve is closed. Via control line (1) and ball (2), the pressure in the main port ① acts on the spring plate (3). If the pressure in the main port ① rises above the value set at the compression spring (4), the ball (2) opens and the hydraulic fluid flows into the main port ②. ➀ Main port 1 (P) ➁ Main port 2 (T) Type code 01 02 03 04 05 06 07 08 09 DBD 2 K 2X / V * 01 Pressure relief valve, direct controlled DBD Adjustment type 02 Hexagon with protective cap S Rotary knob with scale L Lockable rotary knob with scale A Hand wheel H 03 Size 2 2 04 Screw-in cartridge valve K 05 Component series 20 … 29 (20 … 29: unchanged installation and connection dimensions) 2X Pressure rating 06 Set pressure up to 25 bar 25 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 Sealed set pressure (adjustment type “S” only) 07 Unsealed no code Sealed – please specify set pressure (setting interval si]5 bar[/si][imp]75 psi[/imp] ) P... 1) Seal material 08 NBR seals no code FKM seals V Observe compatibility of seals with hydraulic fluid used. (Other seals upon request) 09 Further details in the plain text * 1) Order example: Set pressure 190 bar → DBDS 2 K2X/200 P180 V Technical data (For applications outside these values, please consult us!) general Size 2 Weight (approx.) kg 0.3 Installation position any Ambient temperature range °C -20 … +80 hydraulic Size 2 Maximum operating pressure Inlet bar 420 Outlet bar 315 Maximum set pressure bar 25 50 100 200 315 420 Maximum flow l/min 2 Recommended l/min 1.5 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 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. Hydraulic fluid Classification Suitable sealing materials Standards Data sheet Mineral oils HL, HLP, HLPD, HVLP, HVLPD 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, HFDR FKM ISO 12922 90222 Containing water HFC (Fuchs Hy
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