Danfoss Shuttle Valves Technical Information
Shuttle Valves Technical Information
1
3
2
AB
F
2
4
3
2
4
3
spool overlap = Cspool overlap = O
Quick Reference
Cartridge Model No. Cavity Description Flow* Pressure Page
CP124-1 CP04-3 Load Shuttle Valves,
Normal direction
CP128-1 SDC08-3 22 l/min
SV04 NCS04/3 15 l/min
CP120-4 SDC10-3 25 l/min
SV06 NCS06/3 48 l/min
3.7 l/min
[1 US gal/min]
[5.8 US gal/min]
[4 US gal/min]
[7 US gal/min]
[12.7 US gal/min]
350 bar
[5075 psi]
315 bar
[4570 psi]
315 bar
[4570 psi]
330 bar
[4800 psi]
350 bar
[5075 psi]
SH - 4
SH - 5
SH - 6
SH - 7
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In-line Model No. Cavity Description Flow* Pressure Page
VS 06 none Load shuttle Valve,
In-line
VS 10 none 45 l/min
Quick Reference
35 l/min
[9 US gal/min]
[12 US gal/min]
350 bar
[5075 psi]
350 bar
[5075 psi]
SH - 9
SH - 10
Hot oil shuttle Model No. Cavity Description Flow* Pressure Page
CP720-3 SDC10-4 Hot Oil Shuttle 25 l/min
[7 US gal/min]
CP721-3 CP12-3M 90 l/min
[24 US gal/min]
350 bar
[5075 psi]
350 bar
[5075 psi]
SH - 11
SH - 12
* Flow ratings are based on a pressure drop of 7 bar [100 psi] unless otherwise noted. They are for comparison purposes only.
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Shuttle Valves Technical Information
Application Notes
There are two types of shuttle valves -- load shuttle valves and hot oil shuttle valves.OVERVIEW
Shuttle valves
LOAD SHUTTLE VALVE
higher of two inlet pressures at 1 and 3
to the outlet at 2. A steel ball is used to
seal the lower pressure. Load shuttles
have several common applications
including:
· Logic for load sensing circuits
· Bi-directional motor brake release
valve
Load sensing circuit
Load shuttle valveA load shuttle valve communicates the
1
2
Bi-directional motor brake release valve
3
Application Notes
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Shuttle Valves Technical Information
Application Notes
Application Notes
Hot oil shuttles are spool-type valves
that use internal piloting at 2 and 4 to
direct oil from the lower of the two input
pressures to the outlet at 3.
A common application for a hot oil
shuttle is diverting uid from the
low pressure side of a closed-circuit
hydrostatic loop for cooling and/or
ltering.
Hot oil shuttle valve
2
34
Closed-circuit hydrostatic loopHOT OIL SHUTTLE VALVE
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Shuttle Valves Technical Information
1
3
2
Seals
N
Load Shuttle Valve - Normal Direction
CP124-1
OPERATION
SPECIFICATIONS
DIMENSIONS
mm [in]
This valve senses the higher of the two
input pressures at ports 1 and 3 and
routes it to the output port 2.
Theoretical performance
psi bar
203
174
145
116
87
58
154 SUS (33 cSt) hyd. oil @ 100° F (38° C)
14
12
10
8
6
Press ure drop
4
2029
1L/min
0.3US gal/min
2
3
12
234
Flow
0.5 0.8 1.1
Cross-sectional view
Schematic
Specications
Rated pressure* 350 bar [5075 psi]
Rated ow at 7 bar
[100 psi]
Leakage 6 drops/min @
Weight 0.02 kg [0.04 lb]
Cavity CP04-3
*Rated pressure based on NFPA fatigue test
standard (at 1 million cycles)
3.7 l/min
[1 US gal/min]
Rated pressure
ORDERING
INFORMATION
1
2
B=Buna-N 120111
V=Viton 120282
7/16-20 UNF
3
36.8
[1.45]
CP124-1-B-4S
Seal kit
I 0.188 in
10-15 N.m
t
[8-10 lbf.ft]
2.5
[0.10]
Housing and portsHousing P/
0=No Housing No Housing
2B =AL, 1/4 BSP CP04-3-2B
4S =AL,#4 SAE CP04-3-4S
Other housings available
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