EATON
DGM**-5 30 Design E-VLST-BB002-E April 2015
N-20
N
Valve function
Manifold or subplate mounted
counterbalance valve.
Interface
5 –
ISO 4401-AC-05-4-A, CETOP 5
RP35H, Size 5 ANSI/NFPA D05
Port operated upon
A –
Counterbalance in A, piloted from B
B –
Counterbalance in B, piloted from A
Pilot ratio
1 –
4:1
2 –
10:1
Pressure range
F –
60 to 210 bar (900 to 3000 psi)
Adjustment device
H –
Knob adjuster
C –
Cap over screw
W –
Screw with locknut
Port acted upon
(Omit for single type.)
B –
Counterbalance in B, piloted from A
Pilot ratio
(Omit for single type.)
1 –
4:1
2 –
10:1
Pressure range
(Omit for single type.)
F –
60 to 210 bar (900 to 3000 psi)
Adjustment device
(Omit for single type.)
H –
Knob adjuster
C –
Cap over screw
W –
Screw with locknut
Design mumber - 30 series
Subject to change. Installation
dimensions unaltered for design
numbers 30 to 39 inclusive.
SystemStak™ Counterbalance Valves
Functional Symbols
Model Code
DGMR
General Description
Eaton SystemStak counterbalance valves provide continuous
protection from pump cavitation and prevent an actuator from
running ahead of the pump supply.
These valves also provide thermal relief protection in closed
systems.
NOTE
Counterbalance valves adjust in the opposite direction of other pressure
control valves. Turning the adjuster counterclockwise increases the valve
setting. Turning the adjustment clockwise lowers the pressure setting,
releasing the load.
Drain
Any pressure in the line to which these valves are drained is
additive to the valve pressure setting.
Pilot pressure Calculation
To open the counterbalance valve by remote control (referring
to functional symbols below):
For 4:1 ratio (typically for cylinder load control),
nominal pilot pressure at Port B =
Cracking pr (5 x Port A
1
pressure) – Port A pressure
4
For 10:1 ratio (typically for hydraulic motor control),
nominal pilot pressure at Port B =
Cracking pr (11 x Port A
1
pressure) – Port A pressure
10
A
1
A
P
P
T
T
B
1
DGMR-5-A*-FW-B*-FW-30
B
A
1
A
P
P
T
T
B
DGMR-5-A*-FW-30
B
A
A
P
P
T
T
B
1
DGMR-5-B*-FW-30
B
DGMR - 5 - * * - F * - B * - F * - 30
1
7
11
3
4
5
6
9 10
8
2
1
2
3
4
5
6
7
8
9
10
11