Functional Symbols
DGMX-7-PP
XP T B AY
DGMC-7-PT
XP T B AY
DGMC2-7-AT
XP T B AY
DGMC2-7-BT
XP T B AY
DGMFN-7-Y-A**
XP T B AY
DGMFN-7-Y-B**
XP T B AY
XP T B AY
DGMFN-7-Y-A**-B**
DGMPC-7-AB*-BA*
B
1
A
1
XP T B AY
DGMPC-7-AB*
B
1
A
1
XP T B AY
XP T B AY
DGMPC-7-BA*
B
1
A
1
March 1996 GB-2480
ISO 4401 size 07; 315 bar (4500 psi); up to 200 L/min (53 USgpm)
General Description
This range of stackable hydraulic controls
are designed to be mounted under a size
7 directional valve such as Vickers
DG*V-7, solenoid controlled and pilot
operated. With their cartridge design they
will provide a compact hydraulic circuit at
reduced cost with the
elimination of interconnecting piping.
Servicing is simplified with access to
working parts achieved without removing
valves from an assembled stack.
The units are performance rated up to:
200 L/min (53 USgpm)
315 bar (4500 psi)
The range comprises:
DGMX-7 Pressure reducing module. . .
DGMC(2)7 Pressure relief module. . . . .
DGMFN-7 Flow restrictor module. . . . . .
DGMPC-7 Pilot operated check module
Vickers
®
SystemStak
®
SystemStak
®
Valves
Pressure Reducing Valve Modules DGMX-7
General Description / Model Code / Operating Data
(F3-)
Special seals for phosphate ester
fluids
Omit for standard seals; see “Hydraulic
fluids” in “Further Information” section.
Reduced pressure adjustment
range
B = 5 to 65 bar (75 to 945 psi)
G = 15 to 315 bar (220 to 4500 psi)
* -10
1 2 3
1
2
3
4
DGMX-7-PP- -B*
4
Adjustment method
H = Thimble with lock screw
K = Thimble with keylock
Design number, 10 series
Subject to change. Installation
dimensions unchanged for design
numbers 10-19 inclusive.
At cartridge outlet for various pressure settings.
350
300
250
200
150
100
50
0
bar
40
L/min
0
USgpm
0
1000
2000
3000
4000
5000
psi
Flow rate
80 120 160 200
10 20 4030 50
Reduced pressure
2
General Description
These two-stage adjustable pressure
reducing modules are used to regulate
the downstream pressure in the line in
which the integral reducing valve is
installed, whilst the upstream pressure
fluctuates above the reduced pressure.
The valve elements are formed as
cartridges for ease of construction and
servicing.
Operating Data
Pressure and Flow Limits
Max. pressure
(all ports) 315 bar (4500 psi). . . . . . . . . .
Note that back pressure in line Y, into
which the valve’s pilot drain is internally
connected, increases the effective
pressure setting. For pressure adjustment
ranges see “Model Code”.
Max. flow rate
(through any
main line) 160 L/min (42.3 USgpm). . . . .
Performance Characteristics
Typical performance with petroleum oil at
36 cSt (169 SUS) and 50_C (122_F).
Pilot
drain flow 0,5 L/min (0.13 USgpm). . . . .
Model Code
Reduced Pressure Underride
Pressure Reducing Valve Modules DGMX-7
Installation Dimensions in mm (inches)
Valve mounting surface:
seals in mating unit
43 (1.7)
for key removal
56 (2.2)
Type “K” adjuster
Type “H” adjuster
176 (6.93)
101,6 (4.0)
50
(1.97)
36 (1.42) max.
Ø 30
(1.18 dia)
Ø 7
(0.275 dia)
Ø 10,5
(0.413 dia)
Mounting (subplate)
surface: seals supplied
P
AB
T
X
Y
80
(3.15)
70
(2.75)
90
(3.54)
93
(3.66)
73
(2.875)
38
(1.5)
3rd angle
projection
50
(1.97)
G
1
/
4
gage port.
Unscrew plug for access.
34,1
(1.34)
14
(0.55)
For dimensions of ISO 4401, size 07
mounting surface and Vickers subplates,
see catalog 2425.
For details of Vickers fixing bolt kits, see
catalog 2314.
For all models, to increase pressure
setting, unlock and turn the adjuster
clockwise, viewed at the adjuster end.
Turn counter-clockwise to decrease
pressure setting.
Type H adjustment settings can be
secured by tightening the lock screw in
the end of the thimble.
3
DGMX-7
Pressure Relief Valve Modules DGMC(2)-7
General Description / Model Code / Operating Data
Pressure adjustment range
B = 5 to 65 bar (75 to 945 psi)
F = 10 to 210 bar (150 to 3000 psi)
G = 15 to 315 bar (220 to 4500 psi)
Adjustment method
H = Thimble with lock screw
K = Thimble with keylock
Design number, 10 series
Subject to change. Installation
dimensions unchanged for design
numbers 10-19 inclusive.
4
5
6
(F3-)
Special seals for phosphate ester
fluids
Omit for standard seals; see “Hydraulic
Fluids” in “Further Information” section.
Type
C = Pressure (P) line relief
C2 = Service (A or B) line relief
Function
AT = Limits A, discharge to T;
(F3-)DGMC2 models
BT = Limits B, discharge to T;
(F3-)DGMC2 models
PT = Limits P, discharge to T;
(F3-)DGMC models
* -10
1 4 5
1
2
3
DGMC(2)-7- -B*
6
** -
32
At various pressure settings and cartridge outlet at 0 bar/psi.
350
300
250
200
150
100
50
0
bar
40
L/min
0
USgpm
0
1000
2000
3000
4000
5000
psi
Pressure
Flow rate
80 120 160 200
10 20 4030 50
4
General Description
These two-stage adjustable pressure
relief modules are used to limit the
maximum pressure in the lines from which
the integral relief elements are fed.
The relief elements are formed as
cartridges for ease of construction and
servicing.
Operating Data
Pressure and Flow Limits
Max. pressure
(all ports) 315 bar (4500 psi). . . . . . . . . .
Note that back pressure in line T, into
which the valve’s pilot drain is internally
connected, increases the effective
pressure setting. For pressure adjustment
ranges see “Model Code”.
Max. flow rate
(through any
main line) 200 L/min (53 USgpm). . . . . .
Performance Characteristics
Typical performance with petroleum oil at
36 cSt (169 SUS) and 50_C (122_F).
Pilot
drain flow 0,5 L/min (0.13 USgpm). . . . .
Model Code
Pressure Override at Cartridge Inlet
Pressure Relief Valve Modules DGMC(2)-7
Installation Dimensions in mm (inches)
Valve mounting surface:
seals in mating unit
43 (1.7)
for key removal
57 (2.25) 127 (5.0)
Type “K” adjuster
Type “H” adjuster
53 (2.09)
190 (7.48)
101,6 (4.0)74 (2.9)
73
(2.875)
70
(2.75)
90
(3.54)
93
(3.66)
50
(1.97)
34,1
(1.34)
105 (4.13)
38
(1.5)
35 (1.375)
max.
Ø 30
(1.18 dia)
Ø 7
(0.275 dia)
Ø 10,5
(0.413 dia)
G
1
/
2
Mounting (subplate)
surface: seals supplied
PAB
P
AB
T
X
Y
3rd angle
projection
80 (3.15)
For dimensions of ISO 4401, size 07
mounting surface and Vickers subplates,
see catalog 2425.
For details of Vickers fixing bolt kits, see
catalog 2314.
For all models, to increase pressure
setting, unlock and turn the adjuster
clockwise, viewed at the adjuster end.
Turn counter-clockwise to decrease
pressure setting.
Type H adjustment settings can be
secured by tightening the lock screw in
the end of the thimble.
5
DGMC(2)-7
Flow Restrictor Valve Modules DGMFN-7
General Description / Model Code / Operating Data
(F3-)
Special seals for phosphate ester
fluids
Omit for standard seals; see “Hydraulic
Fluids” in “Further Information” section.
Direction of flow
Meter-out, with respect to machine
actuator
Control in line A
Standard needle, thimble-with-lockscrew
adjustment
Omit when not required
-10
1 4 5
1
2
3
DGMFN-7
2 3
-Y-(-A2H)(-B2H)
Control in line B
Standard needle, thimble-with-lockscrew
adjustment
Omit when not required
Design number, 10 series
Subject to change. Installation
dimensions unchanged for design
numbers 10-19 inclusive.
4
5
bar
0
psi
Flow rate
Pressure drop
1
2
3
4
5
6
7
8
100
80
60
40
20
120
040
0
80 120 160 200
10 20 4030 50
L/min
USgpm
Restrictor
shut
Restrictor
fully open
6
General Description
Regulates flow rate between a CETOP
size 7 four-way valve and a hydraulic
actuator. Unit is sandwiched between
directional valve and subplate or
manifold. Single or dual line restrictor
models are available for meter-out
control, relative to the machine actuator.
Operating Data
Pressure and Flow Limits
Max. pressure
(all ports) 315 bar (4500 psi). . . . . . . . . .
Max. flow rate (through
any main line) 180 L/min (48 USgpm). .
Performance Characteristics
Typical performance with petroleum oil at
36 cSt (169 SUS) and 50_C (122_F).
Model Code
Pressure Drops, Restrictor Lines
Flow Restrictor Valve Modules DGMFN-7
Installation Dimensions in mm (inches)
Locking screw, 3 (0.188) A/F socket
Valve mounting surface:
seals in mating unit
50 (2.0)
73
(2.875)
70
(2.75)
90
(3.54)
93
(3.66)
50
(1.97)
34,1
(1.34)
Ø 7
(0.275 dia)
Ø 10,5
(0.413 dia)
Mounting (subplate)
surface: seals supplied
P
AB
T
X
Y
3rd angle
projection
80 (3.15)
C
30
(1.18)
30
(1.18)
DGMFN-7-Y-A2H-10: 242 (9.53) max.
DGMFN-7-Y-B2H-10: 219 (8.62) max.
DGMFN-7-Y-A2H-B2H-10: 329 (12.95) max.
Adjusting screw, 8 (0.315) A/F socket
Adjust by backing-off locking
screw(s) counter-clockwise,
then turning adjusting screw(s)
clockwise to decrease flow/
increase restriction. Re-lock.
D
101,6 (4.0)
For dimensions of ISO 4401, size 07
mounting surface and Vickers subplates,
see catalog 2425.
For details of Vickers fixing bolt kits, see
catalog 2314.
7
DGMFN-7
Model C D
DGMFN-7-Y-A2H
DGMFN-7-Y-B2H
DGMFN-7-Y-A2H-B2H
155 (6.10)
132 (5.20)
155 (6.10)
37 (1.46)
14 (0.55)
37 (1.46)
Pilot Operated Check Valve Modules DGMPC-7
General Description / Model Code / Operating Data
(F3-)
Special seals for phosphate ester
fluids
Omit for standard seals; see “Hydraulic
Fluids” in “Further Information” section.
Line A check
Piloted from B, cracking pressure in
A: 3,6 bar (55 psi)
Omit when not required
-11
1 3 4
1
2
DGMPC-7
2
(-ABK)(-BAK)
3
4
Line B check
Piloted from A, cracking pressure in
B: 3,6 bar (55 psi)
Omit when not required
Design number, 10 series
Subject to change. Installation
dimensions unchanged for design
numbers 10-19 inclusive.
bar
0
psi
Flow rate
Pressure drop
1
2
3
4
5
6
7
8
9
10
100
80
60
40
20
120
140
040
0
80 120 160 200
10 20 4030 50
L/min
USgpm
Free flow:
pilot pressure = 0
Reverse flow;
piloted open
Free flow,
non-check line
8
General Description
These modules provide pilot operated
check functions in one or both service
lines (A and B), the pilot supply coming
from the opposite service line to that in
which the check acts. When closed, the
check prevents flow from the actuator port
to which it is externally connected.
Operating Data
Pressure and Flow Limits
Max. pressure
(all ports) 315 bar (4500 psi). . . . . . . . . .
Max. flow rate (through any
main line) 180 L/min (47.6 USgpm). . . . .
Performance Characteristics
Typical performance with petroleum oil at
36 cSt (169 SUS) and 50_C (122_F).
Check valve’s direct
cracking pressure 3,6 bar (55 psi). . . . .
Pilot piston/check valve
seat area ratio 13:1. . . . . . . . . . . . . . . . . .
Model Code
Pressure Drops, A and B Lines
Pilot Operated Check Valve Modules DGMPC-7
Installation Dimensions in mm (inches)
Valve mounting surface:
seals in mating unit
155 (6.1)
50 (2.0)
101,6 (4.0)
37
(1.46)
73
(2.875)
70
(2.75)
90
(3.54)
93
(3.66)
50
(1.97)
34,1
(1.34)
Ø 7
(0.275 dia)
Ø 10,5
(0.413 dia)
Mounting (subplate)
surface: seals supplied
P
AB
T
X
Y
3rd angle
projection
80 (3.15)
C D
For dimensions of ISO 4401, size 07
mounting surface and Vickers subplates,
see catalog 2425.
For details of Vickers fixing bolt kits, see
catalog 2314.
9
DGMPC-7
Model C D
DGMPC-7-ABK
DGMPC-7-BAK
DGMPC-7-ABK-BAK
28 (1.10)
18 (0.71)
28 (1.10)
18 (0.71)
28 (1.10)
28 (1.10)
Further Information
10
Hydraulic Fluids
Materials and seals used in these valves
are compatible with:
Antiwear petroleum oils L-HM. . . . . . . . .
Non-alkyl based
phosphate esters L-HFD. . . . . . . . . . . . .
The extreme operating range is 13 to 500
cSt (70 to 2300 SUS) but the
recommended running range is 13 to
54 cSt (70 to 250 SUS). For further
technical information about fluids see
catalog 920.
Contamination Control
Requirements
Recommendations on contamination
control methods and the selection of
products to control fluid condition are
included in Vickers publication 9132 or
561, “Vickers Guide to Systemic
Contamination Control”. The book also
includes information on the Vickers
concept of “ProActive Maintenance”.
The following recommendations are
based on ISO cleanliness levels at
2 mm, 5 mm and 15 mm.
For products in this catalog the
recommended levels are:
0 to 210 bar (3000 psi) 18/16/13. . . . . .
210 to 315 bar
(3000 to 4500 psi) 17/15/12. . . . . . . . . .
Temperatures
For petroleum oil:
Min. –20_C (–4_F). . . . . . . . . . . . . . . . . .
Max. +60_C (140_F). . . . . . . . . . . . . . . . .
For water-containing fluids:
Min. +10_C (50_F). . . . . . . . . . . . . . . . . .
Max. +54_C (130_F). . . . . . . . . . . . . . . . .
For other fluids where limits are outside
those of petroleum oil, consult fluid
manufacturer or Vickers representative.
Whatever the actual temperature range,
ensure that viscosities stay within those
specified under “Hydraulic Fluids”.
Ambient for:
All valves at full performance
specification: 0 to +60_C (32 to +140_F)
Mass, approx.
DGMX-7 8,3 kg (18.3 lb). . . . . . . . . . . . .
DGMC(2)-7 8,3 kg (18.3 lb). . . . . . . . . . .
DGMFN-7-Y-A2H 7,1 kg (15.6 lb). . . . . .
DGMFN-7-Y-B2H 5,8 kg (12.8 lb). . . . . .
DGMFN-7-Y-A2H-B2H 7,7 kg (17.0 lb).
DGMPC-7 7,3 kg (16.1 lb). . . . . . . . . . . .
Mounting Attitude
Unrestricted.
Ordering Procedure
Order by full model designation, e.g.
2 off DGMX-7-PP-GH-10-B
