E 5.169.9.1/01.13
124
Pressure Reducing Valve
Poppet Type, Direct-Acting,
Normally Open,
with Spring Chamber Relief
Metric Cartridge – 450 bar
DMM10121
FEATURES
z Automatic readjustment if there is a pressure drop in the cylinder
z External surfaces zinc-plated
z Hardened and ground valve components to ensure minimal wear and extended
service life
z Adjustable throughout ow range
z Various pressure ranges up to 450 bar
SPECIFICATIONS
Operating pressure: min. 0 to max. 450 bar
Nominal ow: max. 30 l/min
Pressure setting ranges: Up to 110, 250, 50 - 410 bar, 50 - 450 bar
Leakage: Leakage-free
(max. 5 drops
≙ 0,25 cm³/min at 350 bar)
Media operating temperature range: min. -20 °C to max. +120 °C
Ambient temperature range: min. -20 °C to max. +120 °C
Operating uid: Hydraulic oil to DIN 51524 Part 1 and 2
Viscosity range: min. 10 mm²/s to max. 420 mm²/s
Filtration: Class 21/19/16 according to ISO 4406 or
cleaner
MTTF
d
: 150 years (see "Conditions and
instructions for valves" in brochure 5.300)
Installation: No orientation restrictions
Materials: Valve body: high tensile steel
Piston: hardened and
ground steel
Seals: FKM (standard)
NBR (optional, media
temperature range
-30 °C to +100 °C)
Back-up rings: PTFE
Cavity: 10121 (port 3 not used)
Weight: 0.9 kg
The pressure reducing valve DMM10121
is a direct-acting, spring-loaded poppet
valve which is leakage-free. Its function
is to control the pressure at port 2. In
the normal position, the main piston
pushes the ball off the seat and there is
free ow from port 1 to port 2. When the
pre-set pressure is achieved at port 2,
the pressure increase forces the main
piston up, the ball moves with it and seals
leakage-free. When the pressure at port
1 falls below the pressure at port 2, the
poppet valve opens and oil can ow from
port 2 to port 1.
Up to 30 l/min
Up to 450 bar
FUNCTION
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125
MODEL CODE
DMM 10121 – 01 – C – V – 450 V 420
Basic model
2-way pressure reducing valve
Cavity
10121 = 3-way cavity, metric
Type
01 = standard
02 = increased sealing
(special requirement)
Body and ports
C = cartridge only
Seals
V = FKM (standard)
N = NBR (optional)
Pressure setting range
110 = 0 – 110 bar
250 = 0 – 250 bar
410 = 50 – 410 bar
450 = 50 – 450 bar
Type of adjustment
V = adjustable using tool
Other types of adjustment on request
Cracking pressure setting
No details = no setting, spring relaxed
Pressure value = customer-specic cracking pressure
PERFORMANCE
DIMENSIONS
CAVITY
10121
Standard models
Model code Part No.
DMM10121–01–C–V–110V 3479985
DMM10121–01–C–V–250V 3479986
DMM10121–01–C–V–410V 3480034
DMM10121–01–C–V–450V 3465581
Other models on request
Inline connection housings
Code Part No. Material Ports Pressure
R10121 395236 Steel G1/2 420 bar
Seal kits
Code Part No.
In preparation
Form tools
Tool Part No.
Countersink MK4 163910
Reamer MK2 163911
∆p [bar]∆p [bar]
t [s]
Pump pressure at 1
Control pressure at 2
Q [l/min]
tting depth
tting depth
int. hex.
SW 8
int. hex.
SW 8
SW 16
SW 16
SW 31.8 (1.25")
SW 31.8 (1.25")
110 bar Pressure range 410 bar Pressure range
250 bar Pressure range 450 bar Pressure range
max.
max.
max.
max.
max.
max.
ν = 33 mm²/s, T
oil
= 46 °C
ν = 44 mm²/s, T
oil
= 40 °C
HYDAC Fluidtechnik 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
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.
Millimeter (Inch)
Subject to technical modications
Millimeter (Inch)
Subject to technical modications
* Note:
Port 3 is
not used!
*
