Typical Sectional Views
Functional Symbols
PT BA
PT BA PTBA
PTBA
PTBA
DGMR-2-TB
DGMR1-2-PP
DGMX2-2-PA
DGMX2-2-PB
DGMX2-2-PP
DGMX2-2-P*-*W-10
DGMR1-2-PP-*W-10
27
SystemStak Pressure Control Valves
Counterbalance,
Sequence and
Pressure Reducing
DGMR(1)-2-1* series
DGMX2-2-1* series
General description
These single stage valves operate by
the application of pressure on the end of
the valve spool, acting against a spring
which is loaded by means of the manual
adjustment mechanism.
In the counterbalance and sequence
valves, the spool is offset by the spring
such that flow cannot pass through the
valve. When the force exerted by the
pilot pressure on the spool end exceeds
the force of the main spring, the spool is
moved to allow flow through the valve.
In the pressure reducing valve, the
flow path is normally open and is
closed as the pilot pressure exceeds
the manual setting of the valve.
Excessive pressure in the reduced
pressure line is prevented by a
pressure relieving function.
Pressure adjustment options are
screw/locknut, handknob and
micrometer type with keylock.
28
Model Code
3 4 5 761 2
1
Model Series
Manifold or gasket mounted
Interface
2 – ISO/DIS 4401-02-02
Adjustment type
H – Handknob
K – Micrometer with keylock
W – Screw and locknut
Function ports
TYPE
R – Counterbalance
R1– Sequence
X2 – Pressure reducing
2
3
4
6
DGMR models only:
Design
Subject to change. Installation
dimensions unchanged for design
numbers 10 thru 19.
TB – Counterbalance control
function in “T” port, controlled
by pressure in “B” port.
DGMR1 models only:
PP – Sequence control in “P” port,
controlled by pressure in “P” port
DGMX2 models only:
PA – Pressure reducing function in
line P, piloted from A
PB – Pressure reducing function in
line P, piloted from B
PP – Pressure reducing function in
line P, piloted from P
7
5
Pressure adjustment range
A – 2 – 16 bar (29-232 psi)
B – 2 – 40 bar (29-580 psi)
C – 30 – 100 bar (435-1450 psi)
F – 70 – 160 bar (1000-2300 psi)
G – 120– 250 bar (1740-3600 psi)
Operating Data
Maximum flow rate 30 l/min (7.9 USgpm)
Maximum operating pressure 250 bar (3600 psi)
Hydraulic fluids
Filtration requirements
Refer to appendix
Temperature limits
Mass, approximate (all models) 0,87 kg (1.9 lb.)
Mounting attitude No restrictions.
29
Performance Data
Typical performance with mineral oil at
21 cSt (102 SUS) and at 50C (122F).
2000
Pressure
psi bar
l/min
USgpm
Note: Valves will not function at
pressure/flow values in shaded area.
DGMR1-2-PPDGMX2-2-P*
0
50
100
150
200
250
0
1000
3000
0 12345677.9
0 5 10 15 20 25 30
l/min
0 5 10 15 20 25 30510
3 2 1 0 1 2 3 4 5 6 7 7.9 USgpm
bar
0
50
100
150
200
250
300
0
1000
2000
3000
4000
psi
Flow rate
Flow rate
Reverse flow to T line
Reduced pressure line
Pressure
0
50
100
150
200
250
300
0
5
10
15
Leakage flow rate
Reduced outlet pressure
Inlet pressure 250 bar (3600 psi)
0
50 100 150 200 250
bar
10000 2000 3000 3600 psi
in
3
/mincm
3
/min
For other viscosities refer to appendix
Typical leakage flow from reduced pressure line into T
at “dead-head” condition (i.e. no flow required at
reduced pressure outlet). This leakage flow must be
provided at the inlet line P in order to maintain the
reduced outlet pressure.
Note that the effective reduced pressure is the sum
of the valve adjustment and any back pressure in
line T. The effect is illustrated below.
DGMR1-2-PP-F*-1*
DGMR1-2-PP-G*-1*
DGMR1-2-PP-C*-1*
DGMR1-2-PP-B*-1*
DGMX2-2-P*-G*-1*
DGMX2-2-P*-F*-1*
DGMX2-2-P*-C*-1*
DGMX2-2-P*-B*-1*
DGMX2-2-P*-A*-1*
Typical installation
Crossover
plate
DGMX2-2-PP
Subplate
A
B
P
T
30
Installation Dimensions
110,0 (4.33 max.)
74,0 (2.91)
DGMR-TB-*W-1*
DGMR1-PP-*W-1*
DGMX2-P*-*W-1*
Dimensions shown in mm (inches)
34,0
(1.34)
12,7
(0.5)
29,0
(1.14)
25,0
(0.99)
50,0 (1.97)
148,0 (5.83) max.
17,5
(0.69)
36,8
(1.45)
35,0
(1.38)
4 holes thru
5,5 (0.21 dia.)
A
B
P
T
15,0
(0.59)
30,0
(1.18)
3,0 (0.12)
3,0 (0.12 dia.)
25,0
(0.99)
20,0
(0.78)
26,0
(1.02)
134,5 (5.29)
W adjuster (Shown)
To adjust valve setting. loosen locknut and
turn adjuster screw clockwise to increase
pressure, counterclockwise to decrease
pressure. Re-tighten locknut after
completing adjustment.
H adjuster
To adjust valve setting. loosen locknut and turn
knob clockwise to increase pressure setting,
counterclockwise to decrease pressure setting.
Re-tighten locknut after completing adjustment.
K adjuster
Key must be inserted and turned to allow valve
setting to be adjusted. Turn knob clockwise to
increase pressure setting, counterclockwise to
decrease pressure setting. When key is removed,
adjustment mechanism can be freely turned without
changing valve setting.
19,5
(0.77)
square
Adjuster screw 4,0 (5/32”
across flats hex. socket)
Hex locknut
12,7 (1/2”)
