CB - Counterbalance Valves
Counterbalance Valves Catalog
CB - 10
11141737 • Rev AB • November 2013
OPERATION
APPLICATIONS
SPECIFICATIONS
PERFORMANCE
SCHEMATIC
154 SUS (33 cSt) hyd. oil @ 100° F (38° C)
5
0
73
psi bar
Pressure drop
40L/min
Flow
10.6US gal/min
10
15
20
25
30
145
218
290
363
435
80 120 160 200
21.1 31.7 42.3 52.8
free flow
pilot open
1
2
3
This 3-ported, externally piloted unit is a 12-size cartridge style,
low leakage counterbalance valve with hydraulic vent. The check
section allows free ow from the directional valve (port 2) to the
load (port 1), while normally blocking ow from port 1 to port
2. Reverse ow is blocked until pilot pressure is applied at port 3.
When the load pressure at port 1 rises above the pressure setting,
the integral relief valve is activated and pressure is relieved from
port 1 to port 2.
Rated pressure 350 bar [5075 psi]*
Rated ow at
22 bar (319 psi )
115 l/min [30 US gal/min]
Leakage 10 drops/min @ 70% of
crack pressure
Weight 0.22 kg [0.48 lb]
Pilot ratio 3:1, 4.5:1, 10:1
Cavity CP12-3S
* 350 bar with steel housing
210 bar with aluminum housing
CP441-1
Hydraulic Vent
Single counterbalance valves are normally used when the load is unidirectional, such as aerial lifts, cranes, or winches.
In load holding applications, they can be used as hose-break valves when installed near or within an actuator. Dual
valves can be used for controlling loads bi-directionally in motor applications, or for cylinders going over center.
CP441-1
CB - Counterbalance Valves
Counterbalance Valves Catalog
CB - 11
mm [in]
11141737 • Rev AB • November 2013
DIMENSIONS
EXAMPLE CIRCUITS
ORDERING INFORMATION
Load Holding -
Single Actuator
Counterbalance-
Double
Actuator
CP441-1 CP441-1
CP441-1
55.9
[2.20]
41.1
[1.62]
1-1/16-12 UN
turn ccw to increase
pressure setting
turn cw to reduce
pressure setting
1
2
3
h
t
1.25 in
68-75 N
.
m
[50-55 lbf
.
ft]
4mm
Hydraulic Vent
CP441-1
CP448-1CP441-1
