CP448-1 Counterbalance Valve
English Chinese (Simplified)

comatrol hydraulic cartridge valves



This 3-ported, externally piloted counterbalance valve is 8-size, cartridge style, low leakage with hydraulic vent. The check section allows free flow from the directional valve (port 2) to the load (port 1), while normally blocking flow from port 1 to port 2. Reverse flow is blocked until pilot pressure is applied at port 3. When the load pressure at port 1 rises above the pressure setting, the relief valve is activated and pressure is relieved from port 1 to port 2.





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 close to or in an actuator. Dual valves can be used for controlling loads bi-directionally in motor applications, or for cylinders going over center.








Rated Pressure  350 bar [5075 psi]
Rated flow at 22 bar
[319 psi]   
 20 l/min
[5 US gal/min]
Leakage  10 drops/min @
70% crack pressure 
Weight  0.16 kg [0.36 lb]
Pilot Ratio  3:1, 4.5:1, 8:1
Cavity  CP08-3L



Performance Curves








Example Circuits




Ordering Information

Product Documents and Downloads
Download this file (CP448-1 - 3D STP Files.zip)CP448-1 - 3D STP Files.zip47 kB04-28-2015
Download this file (CP448-1 Catalog Page.pdf)CP448-1 Catalog Page.pdf407 kB04-28-2015
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