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comatrol hydraulic cartridge valves

 

Operation

 

The VCB12-EN is a cartridge style, 12-size metric
counterbalance valve with hydraulic vent. This valve
is 3-ported, externally piloted and low leakage. The
check section allows free flow from the directional valve
(port 2) to the load (port 3). Reverse flow is blocked
until pilot pressure is applied at port 1. When the
load pressure at port 3 rises above the pressure
setting, the integral relief valve is activated and pressure
is relieved from port 3 to port 2.

f_250_250_16777215_00_images_counterbalance-valves_VCB12-EN_VCB12-EN_product.jpeg


 

 

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 cartridges can be used
for controlling loads bi-directionally in motor
applications, or for cylinders going over center. Since
this valve is piloted at port 1, no cross port
drilling is required when dual cartridges are mounted
nose to nose in an HIC.

 

 

 

Specifications

Schematic   

Rated Pressure  350 bar
[5075 psi]
Rated flow at 22bar
[319 psi]  
  140 l/min
[37 US gal/min]
Leakage  10 drops/min @
70% crack pressure  
Weight  0.7 kg [1.58 lb]
Pilot Ratio  4.7:1, 5.9:1, 6.9:1
Cavity  NCS12-3
f_250_250_16777215_00_images_counterbalance-valves_VCB12-EN_VCB12-EN_schematic.jpeg

 

Performance Curve

f_250_250_16777215_00_images_counterbalance-valves_VCB12-EN_VCB12-EN_performance.jpeg

Dimensions

f_670_300_16777215_00_images_counterbalance-valves_VCB12-EN_VCB12-EN_dimensions.jpeg

 

Example Circuits

 

f_670_300_16777215_00_images_counterbalance-valves_VCB12-EN_VCB12-EN_ec1.jpeg  f_670_300_16777215_00_images_counterbalance-valves_VCB12-EN_VCB12-EN_ec2.jpeg  

Ordering Information

f_670_300_16777215_00_images_counterbalance-valves_VCB12-EN_VCB12-EN_ordering.jpeg  

 

 
Product Documents and Downloads
Download this file (VCB12-EN 3D STP file.stp)VCB12-EN 3D STP file.stp349 kB04-14-2014
Download this file (VCB12-EN Catalog Page.pdf)VCB12-EN Catalog Page.pdf497 kB02-11-2014
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