Bosch Rexroth | DBDH20G1X50
DBDH20G1X/50
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The DBDH20G1X/50 valve belongs to the DB Pressure Relief Valves series from Bosch Rexroth and is applied in hydraulic automation to hold line pressure within safe limits by discharging excess flow. Its steel body is machined for nominal size 20 passages, giving a nominal flow capacity of 250 l/min without excessive pressure loss. The spring stage allows adjustment from 1 bar to 50 bar so the relief threshold can be tuned to the load. Internal flow is directed from port P to port T, and the housing provides three ports in total, each threaded G 1 for compatibility with common pipe fittings. Because the design is insensitive to gravity or trapped air, the component may be mounted in any installation position inside power units or manifolds.
For reliable service in mobile and industrial settings, the DBDH20G1X/50 functions in ambient temperatures from -30 °C to +80 °C and tolerates hydraulic oils whose viscosity remains between 10 mm²/s and 800 mm²/s. NBR sealing elements contain the working fluid while resisting swelling or leakage. The valve accepts HL, HLP, HLPD, HVLP, and HVLPD media, so users can choose standard, detergent, or low-wear formulations without changing hardware. To protect the precision surfaces, the supply oil must meet cleanliness class ISO 4406 code 20/18/15, which limits particulate contamination and keeps the poppet response repeatable under cycling loads.
Technical Specifications
Ambient Temperature Max
+80 b0C
Ambient Temperature Min
-30 b0C
Body Material
Steel
Cleanliness Class
ISO 4406 (20/18/15)
Compatible Fluids
HL, HLP, HLPD, HVLP, HVLPD
Flow Direction
P 60 60 3e T
Installation Position
Any
Max Adjustable Pressure
50 bar
Min Adjustable Pressure
1 bar
Nominal Flow
250 l/min
Nominal Size
20
Number Of Ports
3
Port Thread Size
G 1
Seal Material
NBR
Viscosity Max
800 mm b2/s
Viscosity Min
10 mm b2/s
1620 Old Apex Road
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