E 5.922.2.1/01.13
106
Pressure Relief Valve
Spool Type, Pilot-Operated
SAE-12 Cartridge – 350 bar
DB12P
200 l/min
350 bar
The DB12P is a pilot-operated, spool
type pressure relief valve. If the pressure
at port 1 exceeds the pressure setting,
the pilot poppet opens, creating a small
ow over the orice of the pilot stage to
the tank. The pressure drop across the
orice lifts the main spool against a light
spring, opening the connection between
port 1 and port 2.
FEATURES
z External surfaces zinc-plated and corrosion-proof
z Hardened and ground internal valve components to ensure minimal wear and
extended service life
z Excellent stability throughout the entire ow range
z Low pressure drop due to CFD optimized ow path
z Screen protected metering orice enhances safety
z Optional spring ranges up to 345 bar
z Adjustable throughout ow range
z Quick response
z Compact design
FUNCTION
SPECIFICATIONS
Operating pressure: max. 350 bar
Nominal ow: max. 200 l/min
Setting pressure ranges: up to 35 bar
up to 63 bar
up to 125 bar
up to 230 bar
up to 345 bar
Internal leakage: less than 0.5 l/min at 350 bar
Media operating temperature range: min. -30 °C to max. +100 °C
Ambient temperature range: min. -30 °C to max. +100 °C
Operating uid: Hydraulic oil to DIN 51524 Part 1 and 2
Viscosity range: min. 7.4 mm²/s to max. 420 mm²/s
Filtration: Class 21/19/16 to ISO 4406
or cleaner
Installation: No orientation restrictions
Materials: Valve body: free-cutting steel
Spool: hardened and
ground steel
Seals: NBR (standard)
FKM (optional, media
temperature range
-20 °C to +120 °C)
Cavity: FC12-2
Weight: 0.26 kg
E 5.922.2.1/01.13
107
MODEL CODE
DB12P-01 – C – N – 180 V 100
Basic model
Pressure relief valve, UNF
Body and ports*
C = cartridge only
SB6 = G3/4 ports, steel body
AB6 = G3/4 ports, aluminium body
Seals
N = NBR
V = FKM
Setting pressure range
050 = to 35 bar
090 = to 62 bar
180 = to 125 bar
330 = to 230 bar
500 = to 345 bar
Other pressure ranges on request
Type of adjustment
V = Allen head (hex. 5/32")
H = Knob adjustment
F = Factory preset, non adjustable
K = Allen head (hex. 5/32") with protective cap
Opening pressure setting
No details = no setting, spring relaxed
Pressure value = customer-specic opening pressure on
request
CAVITY
FC12-2
DIMENSIONS
Form tools
Tool Part No.
Countersink FC12-2 176951
Reamer FC12-2 176952
millimeter (inch)
subject to technical modications
millimeter (inch)
subject to technical modications
PERFORMANCE
Relieving pressure [bar]
Flow rate
Measured at ν = 34 mm²/s, T
oil
= 46 °C
HYDACFluidtechnik GmbH
Justus-von-Liebig-Str.
D-66280 Sulzbach/Saar
Tel: 0 68 97 /509-01
Fax: 0 68 97 /509-598
E-Mail: utec@hydac.com
thick
hex. SW 1"
torque
50 – 60 Nm
int. hex.
SW 13
1/2"
int. hex.
SW 4
5/32"
Standard models
Model code Part No.
DB12P-01-C-N-090V 3047311
DB12P-01-C-N-330V 3047313
DB12P-01-C-N-500V 3047314
*Standard in-line bodies
Code Part No. Material Ports Pressure
FH122-SB6 3053782 Steel, zinc-plated G3/4 420 bar
FH122-AB6 3053843 Aluminium, anodized G3/4 210 bar
Seal kits
Code Material Part No.
FH122-N Seal kit NBR 3071298
FH122-F Seal Kit FKM 3071299
NOTE
The information in this brochure relates to the
operating conditions and applications described.
For applications or operating conditions not
described, please contact the relevant
technical department. Subject to technical
modications.
