BRAND Hydraulics DCF DIRECTIONAL CONTROL VALVE - Manual (Page 3)

04/14
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
SPOOL SCHEMATICS:
SAFETY PRECAUTIONS:
 It is the purchaser’s responsibility to determine the suitability of any Brand Hydraulics Co. product for an intended
application, and to ensure that it is installed in accordance with all federal, state, local, private safety and health
regulations, codes and standards. Due to the unlimited variety of machines, vehicles and equipment on which our
products can be used, it is impossible for Brand Hydraulics Co. to offer expert advice on the suitability of a product
for a specific application. It is our customer’s responsibility to undertake the appropriate precautions, testing and
evaluation to prevent injury to the end-user.
 Overpressure may cause sudden and unexpected failure of a component in the hydraulic system, resulting in serious
personal injury or death. Always use a gauge when adjusting a relief valve.