Adjustable Hydraulic Pressure Relief Valve

PRODUCT TYPE: DB Adjustable Hydraulic Pressure Relief Valve
VALVE SERIES: 10, 20, 30 Series
CONTROL METHOD: Pressure Adjustable
APPLICATION Hydraulic Machines
CONNECTION TYPE: Subplate Connection
– Without pilot solenoid directional valve
– Various adjustable pressure setting
– Much stable operation and adjusting

DB/DBW Relief Valve PDF

DB Adjustable hydraulic pressure relief valve will be able to adjust the system pressure while it is in operation, the pressure will be adjust from 0.5Mpa to its ability pressure. The DB series is without the solenoid operated direction valve on the top of the main valve (base), therefore, the valve is no quick inlet pressure on or off.

DB series of adjustable hydraulic pressure relief valve Finotek produced are as per the ISO standard installation dimensions, can be replaced with the other brand valves, but offering affordable price with more competitive quality.

DB Valve Ordering Code

Example (Normal code): “FT-DB 10 B 1 5X/20 ”
Explanation As Below:

FT- DB 10 B 1 5X / 20  
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)

(1) Producer code= FT
(2) Size= 10; 15; 20; 25 or 30
(3) A= Normal closed
  B= Normal open
(4) No code= Modular mounted
  G= Threaded mounted
(5) 1= Hand wheel adjustment
  2= Screw adjustment and protective cap
(6) 5X= Valve series

(7) 20= Settable pressure up to 20Mpa
  5= Settable pressure up to 5Mpa
  10= Settable pressure up to 10Mpa
  31.5= Settable pressure up to 31.5Mpa
(8) No code= Internally piloted, internally drained
  X= Externally piloted, internally drained
  Y= Internally piloted, externally drained
  XY= Externally piloted, externally drained
(9) No code= Standard
  U= Min. opening pressure
(10) No code = Black Galvanization
  B= Blue Powder Coating

DB Valve Technical Information

Main Raw Materials: Casting Iron
Power: By hydraulic
Brand: Finotek or OEM
Max. Operation Pressure(T): 31.5Mpa
Max. Operating Pressure(P,A,B): 35Mpa

Max. Flow Rate: 250L/min.
Oil Medium Temperature: -30 to +80(°C)for NBR O-rings
Oil Medium: Mineral oil as per DIN51 524, VDMA 24 568 or rapeseed oil, Viscosity 10 – 400 CST
Recommended Medium Filtration: ISO 4406 Standard, cleanliness class:20/18/15

DB Valve Function Symbol


DB Valve Installation Dimensions


FT-DB Series High-Pressure Relief Valve To Replace the Following Code:

DB10-1-30B/50    DB10-1-30B/100    DB10-1-30B/200    DB10-1-30B/315

DB10-2-30B/50    DB10-2-30B/100    DB10-2-30B/200    DB10-2-30B/315

DB20-1-30B/50    DB20-1-30B/100    DB20-1-30B/200    DB20-1-30B/315

DB20-2-30B/50    DB20-2-30B/100    DB20-2-30B/200    DB20-2-30B/315

DB30-1-30B/50    DB30-1-30B/100    DB30-1-30B/200    DB30-1-30B/315

DB30-2-30B/50    DB30-2-30B/100    DB30-2-30B/200    DB30-2-30B/315

DB10-1-50B/50    DB10-1-50B/100    DB10-1-50B/200    DB10-1-50B/315

DB10-2-50B/50    DB10-2-50B/100    DB10-2-50B/200    DB10-2-50B/315

DB20-1-50B/50    DB20-1-50B/100    DB20-1-50B/200    DB20-1-50B/315

DB20-2-50B/50    DB20-2-50B/100    DB20-2-50B/200    DB20-2-50B/315

DB30-1-50B/50    DB30-1-50B/100    DB30-1-50B/200    DB30-1-50B/315

DB30-2-50B/50    DB30-2-50B/100    DB30-2-50B/200    DB30-2-50B/315