7-3
Catalogue HY11-3500/UK
Parker Hanniļ¬n GmbH & Co. KG
Hydraulic Controls Division
Kaarst, Germany
Direct Operated Pressure Relief Valve
Series RDM
7
RDM_UK.INDD RH
Characteristics
Pressure relief valves series RDM are direct operated pis-
ton type valves with low hysteresis. They can be used as
P-T relief or as T-T controlled counter balance valve. The
valve body is equipped with a preesure gauge port.
Function
PT... pressure is relieved from P to T at the adjusted
value.
TT... pressure is relieved from T' to T at the adjusted
pressure.
Features
ā¢ The direct operated, cushioned piston design results in
fast response, low leakage and minimal hysteresis.
ā¢ Up to 5 pressure adjustment ranges are available with
max. pressure settings of:
bar 25, 64, 160, 210, 350 for RDM2,
bar 19, 50, 100, 150, 210 for RDM3.
ā¢ Adjustment modes:
- Slotted head with lock nut
- DIN lock
- Turning knob
ā¢ RDM2 - NG06 (CETOP3)
RDM3 - NG10 (CETOP5)
Technical data
Series RDM2 RDM3
Port size
NG06 NG10
Mounting pattern ISO 4401
Max. operating pressure
P, A, B [bar] 350 315
T [bar] 50 10
Max. ļ¬ow [l/min] 40 80
Weight [kg] 1.3 2.6
Viscosity range [cSt][mmĀ²/s] 12...230
Filtration ISO 4406: 1999; 18/16/13
Schematics
RDM*PT
RDM*TT
Gauge port option C (EMA3R1/4EDA3C)
RDM2 Example PT
RDM2
Max. leakage P - A: 5ml/min.
7-4
RDM_UK.INDD RH
Catalogue HY11-3500/UK
Parker Hanniļ¬n GmbH & Co. KG
Hydraulic Controls Division
Kaarst, Germany
Direct Operated Pressure Relief Valve
Series RDM
7
Ordering Code / Performance Curves
Code Pressure relief
PT P
TT
1)
T
Code Adjustment
S
Slotted head
screw with
lock nut
L DIN lock
K Turning knob
3)
Size Pressure
range
AdjustmentPressure
relief valve,
direct
operated
Seal
FPM
RD
V
Code Size
2 NG06
3 NG10
Manapak
M
Pressure range
Code RDM2 Code RDM3
02 1.5 to 25 bar 01 1.5 to 19 bar
06 1.5 to 64 bar
05 1.5 to 50 bar
16 3 to 160 bar
10 3 to 100 bar
21 3 to 210 bar
15 3 to 150 bar
35 5 to 350 bar 21 3 to 210 bar
Design
series
Pressure
relief
Code Gauge port
G
2)
GĀ¼
C Coupling M16
Gauge
port
3)
NG06 only
1)
NG06 only, max. 160 bar
2)
Standard in housing
Performance curves
RDM2 02 RDM2 06
RDM2 16/21 RDM2 35
Ordering code
7-5
Catalogue HY11-3500/UK
Parker Hanniļ¬n GmbH & Co. KG
Hydraulic Controls Division
Kaarst, Germany
Direct Operated Pressure Relief Valve
Series RDM
7
RDM_UK.INDD RH
Performance Curves
RDM3 05
RDM3 10 RDM3 15
RDM3 21
RDM3 01
7-6
RDM_UK.INDD RH
Catalogue HY11-3500/UK
Parker Hanniļ¬n GmbH & Co. KG
Hydraulic Controls Division
Kaarst, Germany
Direct Operated Pressure Relief Valve
Series RDM
7
Seal kit order code
Seal RDM2 RDM3
V SK-RDM2-V SK-RDM3-V
Dimensions
RDM2
RDM3
