BRAND Hydraulics DC DIRECTIONAL CONTROL VALVE - Manual (Page 2)

04/14
Pressure vs. Flow for B Relief (DC)
0
500
1000
1500
2000
2500
3000
1 5 9 15 21 25.5 30
Flow (gpm)
P
re
s
s
u
re
(
p
s
i)
0
34
69
103
138
172
207
3.8 18.9 34.0 56.7 79.4 96.4 113.4
Flow (lpm)
P
re
s
s
u
re
(
b
a
r)
0.0
1.4
2.8
4.1
5.5
6.9
8.3
4 19 34 53 68 87 102 121 136 155 170
0
20
40
60
80
100
120
1 5 9 14 18 23 27 32 36 41 45
P
re
s
s
u
re
(
b
a
r)
Flow (lpm)
P
re
s
s
u
re
(
p
s
i)
Flow (gpm)
Neutral Flow Pressure Drop
DCF M SPOOL
DCF TM SPOOL
DC T4 SPOOL
T P
A B
Tandem Center (T) - Powers cylinder or motor in
both directions (metering capability is very
limited). Pump unloads to tank when spool is in
neutral. Cylinder or motor blocked when spool in
neutral. This spool is not designed for DCF valve. Open Center (O) - All of the ports are connected
to tank when the spool is in neutral. Allows
cylinder to move or motor to rotate when spool is
in neutral. This spool is not designed for DCF
valve.
Fine Metering Spool (M) - The pressure drop in
neutral is higher then the (TM) spool. Requires
external locking valves to hold cylinder, because
ports A and B are open (orificed) in the neutral
position. Extremely fine metering control. This
spool is designed for the DCF valve and acts as
closed center in DC valve.
B A
P T
B A
P T
Tandem Metering Spool (TM) - Similiar to (T)
spool except much finer metering control. The
pressure drop in neutral is lower then the (M)
spool. Cylinder or motor blocked in neutral and
pump unloads to tank. This spool is designed for
DCF valve.
P T
A B
Tandem Three Way (T3) - Powers the cylinder in
one direction. Pump unloads to tank when spool
is in neutral, or when spool is being reversed.
Cylinder is blocked when spool is in neutral. Port
"B" is plugged. This spool is designed for the DC
valve.
P T
Closed Center (C)- All ports are blocked in
neutral. Blocks cylinder or motor in neutral.
Required for use with pressure compensated
pump. This is not available for DCF valve.
A
P
A
B
T
B
5.75" [146]
2.72" [69.0]
4.75" [120.7]
3
.3
8
"
[8
5
.7
]
1
0
.3
0
"
[2
6
2
]
2.70" [68.6] 2.70" [68.6] 2.07" [52.6]
9.07" [230.3]
2
.6
5
"
[6
7
.3
]
4
.0
9
"
[1
0
3
.8
]
2
.0
0
"
[5
1
]
0
.4
1
"
[1
0
.3
]
4
.4
4
"
[1
1
2
.7
]
INLET
Ø 0.27"
(4 PLACES)
PORT A
OUTLET
PORT B
2.73" [69.4]
RELIEF ADJUSTMENT
(1500 PSI SETTING)
DIMENSIONAL DATA:
FLOW & PRESSURE INFORMATION:
SPOOL SCHEMATICS: