PRODUCT ADVANTAGESFUNCTION
FUNCTION DESCRIPTION
2-way pressure reducing valve
DMM10121-11
• Optimum control behaviour
• Low hysteresis
• High repeatability
• Extremely low leakage in seat-tight control position
• Very compact design
• Adjustable range up to 320 bar
• Also available as a low-temperature version
• Exposed surfaces zinc-nickel plated for increased corrosion protection
(1,000 h salt spray test)
EN 5.169.15. 0/04.21
1
up to 25 l/min
up to 450 bar
with atmospheric spring chamber relief
poppet type, direct-acting
Metric Cartridge - 450 bar
The pressure reducing valve is a 2-way pressure valve with atmospheric
spring chamber relief.
It reduces an inlet pressure at port 1 to a lower outlet pressure for the
consumer at port 2. The level of the reduced outlet pressure can be set at the
valve. When the pressure value at port 2 reaches the pressure setting, the
valve closes leak-free at the control point which prevents leakage at the
consumer.
Hint
The tank pressure adds to the set pressure.
The valve is primary pressure-dependent.
Caution
Port 3 is not used and must not be occupied in cavity.
SPECIFICATIONS
1)
Operating pressure max. 450 bar (max. supply pressure at port 1)
Pressure balance see typical performance
Tank pressure (port 3) max. 30 bar
Pressure setting range 10 to 70 bar
20 to 110 bar
20 to 250 bar
20 to 320 bar
Flow rate
max. 25 l/min (port 1 to 2)
Primary pressure dependence as primary pressure increases, the control pressure drops10% ± 3% of the primary
pressure change
Internal leakage leakage-free,
pressure change at port 2 max. ±2 bar in 10 seconds at consumer volume < 100 cm
3
Media operating temperature range NBR: min. -30 °C to max. +100 °C
FKM: min. -20 °C to max. +120 °C
TT NBR: min. -40 °C to +80 °C
2)
Ambient temperature range NBR: min. -30 °C to max. +100 °C
FKM: min. -20 °C to max. +100 °C
TT NBR: min. -40 °C to max. +80 °C
2)
Operating fluid Hydraulic oil according to DIN 51524 Part 1, 2 and 3
Viscosity range min. 10 mm²/s to max. 420 mm²/s
Filtration of operating fluid
(to ISO 4406)
p ≤ 210 bar: min. class 20/18/15
p > 210 bar: min. class 19/17/14
MTTFd 150 - 1200 years, measurement according to DIN EN ISO 13849-1
Installation No orientation restrictions
Material Valve body steel
Piston hardened and ground steel
Seals NBR (standard), FKM, TT-NBR
Back-up rings PTFE
Cavity 10121 metric
Weight 0.48 kg
1)
see “Conditions and Instructions for Valves” in brochure 53.000
2)
For more detailed information see brochure 5.253.1 "Cartridge valves in low temperature version“
Millimeter (Inch)
Subject to technical modifications.
EN 5.169.15. 0/04.21
2
*Torque:
Steel manifold (tensile strength > 360 N/mm²): 70 Nm
Aluminium manifold (tensile strength > 330 N/mm²): 50 Nm
(With torque tool in acc. with DIN EN ISO 6789, tool type II
class A or B) For more information see “Conditions and
Instructions for Valves” in brochure 53.000
Adjustment type CC
Adjustment type H
Adjustment type C
DIMENSIONS
CAVITY
10121 metric
(Port 3 is not used)
VE = Visual examination
* Permitted drilling zone (for manifold design)
** Sharp edges should be avoided by rounding to a radius of 0.1 mm to 0.2 mm
*** Largest pre-drilling diameter (nominal tool diameter)
Millimeter (Inch)
Subject to technical modifications.
MODEL CODE
DMM10121 - 11 - C - N 250 C 250 TT
Basic model
2-way pressure reducing valve, metric
Type
11 = with atmospheric spring chamber relief
Body and ports
C = cartridge only
Sealing material
N = NBR (standard)
V = FKM
Pressure ranges
070 = 10 to 70 bar
110 = 20 to 110 bar
250 = 20 to 250 bar
320 = 20 to 320 bar
Adjustment type
C = adjustable using tool or sealable
CC = sealed with seal cap
H = with handwheel and locking via knurled nut
Pressure setting
No details = no setting
250 = preset customer-specific pressure setting (specified in bar)
Hint: setting occurs: - pressure level 70 bar at inlet pressure = 200 bar and Q = 1 ±0,5 l/min
- pressure level 110; 250; 320 bar at inlet pressure = 350 bar and Q = 1 ±0,5 l/min
Low Temperatur version
No details = not suitable for low temperatures
TT = suitable for low temperatures, with TT-NBR seal
EN 5.169.15. 0/04.21
3
The valve must be relieved by
adjustment when the set pressure
is reduced.
EN 5.169.15. 0/04.21
4
TYPICAL PERFORMANCE
DMM10121-1.-C-.-070
measured at p
1
= 160 bar, v = 33 mm²/s and T
oil
= 46°C
Control pressure [bar]
Flow rate [l/min]
Control pressure [bar]
Flow rate [l/min]
DMM10121-1.-C-.-110
measured at p
1
= 200 bar, v = 33 mm²/s and T
oil
= 46°C
DMM10121-1.-C-.-250
measured at p
1
= 350 bar, v = 33 mm²/s and T
oil
= 46°C
Control pressure [bar]
Flow rate [l/min]
DMM10121-1.-C-.-320
measured at p
1
= 400 bar, v = 33 mm²/s and T
oil
= 46°C
Control pressure [bar]
Flow rate [l/min]
Standard models
Model code Part no.
DMM10121-11-C-N-070C 4406448
DMM10121-11-C-N-110C 4462462
DMM10121-11-C-N-110C080 4469156
DMM10121-11-C-V-250C 4462497
DMM10121-11-C-V-320C 4462498
Other versions on request
Spare parts seal kits
Code Material Part no.
FS Metric 1012./V NBR 3651563
FS 10121 TT-NBR TT-NBR 3676021
FS Metric 1012./V FKM 3919374
Accessories, standard in-line bodies
Code Material Ports Pressure Part no.
H-R10121-SB4/2 steel, zinc-plated G1/4“, G1/2“ 420 bar 395236
Other housings on request
Accessories, form tools for cavity
Tool Part no.
Countersink 163910
Reamer 163911
MATERIAL OVERVIEW
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 modifications.
NOTE
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: valves@hydac.com
