CP448-1 Counterbalance Valve
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comatrol hydraulic cartridge valves

Operation

 

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.

 


 

 

Applications

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.

 

 

 

 

Specifications

Schematic 

 

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

 

 

 

Dimensions

 

 

 

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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