Danfoss CP313-4 Technical Information
Logic Elements Technical Information
66
Pressure
250
3
2
4
1
Pressure Compensator
CP313-4
OPERATION
The CP313-4 is a 20-size, ow control, priority type pressure compensator. Priority-type pressure compensators
are four-ported valves that work in series with a xed or variable control orice. As with the restrictive-type
valves, these valves maintain a constant pressure dierential across the control orice. However, rather than
restricting ow when the dierential pressure becomes too high, the priority-type pressure compensators
open a fourth bypass port for all ow in excess of that demanded by the control orice. Note that if the bypass
port is blocked, the valve will function as a restrictive-type pressure compensator.
APPLICATION
Common applications include any circuit that requires compensated priority ow going to one actuator
(for example, steering or charge pressure to a hydrostatic pump), and a the remaining going to a secondary
function (for example, a fan motor). Pressure compensators oer the circuit designer capability to add
pressure compensation to any xed or variable orice. This ensures that ow, and resulting actuator speed, are
maintained regardless of system and working pressures
SPECIFICATION
Rated pressure 210 bar [3045 psi]
Rated ow at 7 bar
[100 psi]
Weight 1.30 kg [2.80 lb]
Cavity SDC20-4
340 l/min
[90 US gal/min]
PERFORMANCE CURVE
Theoretical performance
Pressure drop
psi
174
131
33 cSt [154 SUS] hyd.oil @ 38° C[100°F]
bar
12
9
1 to 2
10.3 bar spring
SCHEMATIC
6
87
44
3
0
0
l/min
US gal/min
BC332375783111en-000101 • February 2020
1 to 2
5.5 bar spring
50
13.2
100
26.4
Flow
150
4 to 3
200
52.839.6
LE - 67
Logic Elements Technical Information
e
bar [psi]
0
0
0
Housing and po
O
Pressure Compensator
CP313-4
DIMENSION
mm [in]
1.875 in
217-231 N•m
[160-170 lbf•ft]
56.7 [2.23]
Cross-sectional view
1 5/8-12 UN-2A
4
3
141.1 [5.56]
2
EXAMPLE CIRCUITS
Priority-type Pressure Compensator operation Post-Compensated Proportional Priority Flow Control
1
ORDERING
INFORMATION
BC332375783111en-000101 • February 2020
CP313-4-B-16S-130
Seals
Seal kits
B = Buna-N 120181
V =Viton 120182
rtsHousing P/N
0=No Housing No Housing
8B = AL,1 BSP CP20-4-8B
10B = AL, 1-1/4 BSP CP20-4-10B
16S = AL, #16 SAE CP20-4-16S
20S = AL, #20 SAE CP20-4-20S
ther housings available
Differential control pressur
050 = 3.4 50
080 = 5.5 80
100 = 6.9 10
130 = 9.0 13
150 = 10.3 15
LE - 68
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