Logic Elements Technical Information
Pressure Drop
33 cSt[154 SUS] hyd.oil@38°C[100° F]
12174
218 15
131 9
87 6
44 3
00
psi bar
18 37 55
US gal/min
210140700
l/min
2to1with 5.5 bar (80 psi) spring
Spool Type
CP703-4
OPERATION
The CP703-4 is a 20-size, normally open, pilot-to-open, springbiased dierential-sensing logic element. It will modulate ow from
2 to 1 based on the spring control pressure, outlet pressure at port
1, and pilot pressure at port 3.
APPLICATION
Common applications include: pre-compensator for proportional
directional control or ow controls, as well as a pressure control valve.
A common application for this valve is as a pressure compensator when
applied with a xed, or adjustable orice to create a pressure-compensated
ow control. This ensures that ow rate, and resulting actuator speed is
maintained regardless of pressure drop across the control orice. Eective
use of logic elements is a key to designing cost-eective circuits, and is
limited only by the imagination of the designer.
SPECIFICATION
Rated pressure 210 bar [3045 psi]
Rated ow at 7 bar
[100 psi]
Weight 1.18 kg [2.60 lb]
Cavity CP20-3S
200 l/min
[53 US gal/min]
PERFORMANCE CURVE
BC332375783111en-000101 • February 2020
SCHEMATIC
Theoretical performance
LE - 51
DIMENSION
100]
130]
]
Housing and po
other housings
mm [in]
Logic Elements Technical Information
Spool Type
CP703-4
Cross-sectional view
1.88 in
217-231 N•m
[160-170 lbf•ft]
56.7 [2.23]
1 5/8 -12 UN
3
79.4 [3.13]
EXAMPLE CIRCUITS
Compensated Circuit Proportional Pressure Reducing
1
2
ORDERING
INFORMATION
BC332375783111en-000101 • February 2020
CP703-4-B-8B-050
Seals
Seal kit
B=Buna-N 120380
V=Viton 120381
rtsHousing P/N Pilot port
0=No housing No houisng
8B = AL,1 BSP CP20-3S-8B/2B = 1/4 BSP
10B = AL,1-1/4 BSP CP20-3S-10B/2B = 1/4 BSP
16S =#16 SAE CP20-3S-16S/4S =#4 SAE
20S =#20 SAE CP20-3S-20S/4S =#4 SAE
AL,
AL,
available
Differential
Control
Pressure
bar[psi]
050=3.5[50]
080=5.5[80]
100=6.9[
130=9.0[
150=10.3 [150
LE - 52
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