Counterbalance Valves Technical Information
Dual Counterbalance - Hydraulic Vent
CP441-2
OPERATION
This dual counterbalance, internally piloted catalog HIC is a low leakage assembly with hydraulic vent. This HIC uses 2 CP441-1 12-size cartridges and allows free flow from the V port to the C ports and blocks flow in the reverse direction until the relief setting is reached, or until adequate pilot pressure has been applied to the opposite V port.
APPLICATIONS
Dual counterbalance HIC’s are used for controlling loads in bidirectional motion such as wheel motor applications or for cylinders going over center. They are also suitable for use on the boom and dipper cylinder on an excavator.
SPECIFICATIONS |
SCHEMATIC |
Rated pressure |
350 bar [5075 psi]* |
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Rated flow at |
115 l/min [30 US gal/min] |
22 bar (319 psi ) |
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Weight |
1.26 kg [2.77 lb] |
Pilot ratio |
3:1, 4.5:1, 10:1 |
Cavity |
CIB |
*350 bar with steel housing
210 bar with aluminum housing
PERFORMANCE |
psi |
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435 |
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363 |
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290 |
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<![if ! IE]> <![endif]>drop |
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218 |
<![if ! IE]> <![endif]>Pressure |
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145 |
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73 |
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bar |
154 SUS (33 cSt) hyd. oil @ 100° F (38° C) |
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30 |
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25 |
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20 |
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pilot |
open |
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15 |
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10 |
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free flow |
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5 |
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0 |
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L/min |
40 |
80 |
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120 |
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Flow |
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10.6 |
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31.7 |
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US gal/min |
21.1 |
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BC332375678109en-000101 • February 2020 |
CB - 29 |
Counterbalance Valves Technical Information
Dual Counterbalance - Hydraulic Vent
CP441-2
DIMENSIONS mm [in]
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Turn ccw to increase |
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pressure setting |
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Turn cw to reduce |
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129.3 |
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pressure setting |
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[5.09] |
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V2 |
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88.9 |
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V1 |
[3.50] |
Bottom view |
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22.4 |
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82.6 |
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19.1 |
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[0.88] |
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[3.25] |
44.5 |
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[0.75] |
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50.8 |
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[1.75] |
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10.4 |
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[2.00] |
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C2 |
C1 |
38.1 |
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19.1 |
[0.41] |
101.6 |
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12.7 |
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[1.50] |
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[0.75] |
127.0 |
[4.00] |
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[0.50] |
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[5.00] |
Bottom view |
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EXAMPLE CIRCUITS
Bi-directional |
CP441-2 |
Bi-directional |
CP441-2 |
Motor Control |
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Load Control |
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ORDERING INFORMATION
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BC332375678109en-000101 |
• February 2020 |
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CB - 30 |
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