CB20-HV Counterbalance Valve
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comatrol hydraulic cartridge valves

 

Operation

 

CB20-HV : Counterbalance valve, 20-size, hydraulic vent. This is a 3-ported, externally piloted, cartridge style, low leakage unit. 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 integral relief valve is activated and pressure is relieved from port 1 to port 2.

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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 near or within 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  345 bar [5000 psi]
Rated flow at 22 bar
[319 psi]  
  266 l/min
[70 US gal/min]
Leakage  10 drops/min @
70% crack pressure  
Weight  1.22 kg [2.69 lb]
Pilot Ratio  3:1, 4.5:1, 10:1
Cavity  CP20-3S
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Performance Curve

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Dimensions

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Example Circuits

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Ordering Information

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Product Documents and Downloads
Download this file (CB20-HV 3D STP Files.zip)CB20-HV 3D STP Files.zip59 kB02-11-2014
Download this file (CB20-HV Catalog page.pdf)CB20-HV Catalog page.pdf377 kB04-16-2014
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