Danfoss Pressure Reducing Valves User guide
Pressure Reducing Valves Technical Information
2
1
3
3
4
2
1
2
1
3
Quick Reference
Pressure Reducing, Non-Relieving Model No. Cavity Description Flow* Pressure Page
CP230-2 SDC10-3 Pressure Reducing,
Non-Relieving,
PRC 06 NCS06/3 40 l/min
Direct Acting
Pressure Reducing, Relieving Model No. Cavity Description Flow* Pressure Page
CP230-1 SDC10-3 Pressure Reducing,
Relieving, Direct Acting
Pressure Reducing, Relieving Model No. Cavity Description Flow* Pressure Page
PRR10-PVG SDC10-3 Pressure Reducing,
Relieving,
Direct Acting,
Quick Reference
Designed for PVG
Actuators
40 l/min
[11 US gal/min]
[11 US gal/min]
40 l/min
[11 US gal/min]
40 l/min
[11 US gal/min]
210 bar
[3000 psi]
315 bar
[4500 psi]
210 bar
[3000 psi]
210 bar
[3000 psi]
PR - 4
PR - 5
PR - 6
PR - 7
Pressure Reducing, Non-Relieving Model No. Cavity Description Flow* Pressure Page
CP230-4 SDC10-3 Pressure Reducing,
Non-Relieving,
PPRC 06 NCS06/3 40 l/min
Pilot Operated
40 l/min
[11 US gal/min]
[11 US gal/min]
350 bar
[5000 psi]
315 bar
[4500 psi]
PR - 8
PR - 9
Pressure Reducing, Relieving Model No. Cavity Description Flow* Pressure Page
PRMP 064 SDC10-3 Pressure Reducing,
Relieving,
CP231-3 CP12-3S 115 l/min
Pilot Operated
40 l/min
[11 US gal/min]
[30 US gal/min]
315 bar
[4500 psi]
350 bar
[5000 psi]
PR - 10
PR - 11
Pressure Reducing, Relieving Model No. Cavity Description Flow* Pressure Page
PRR10-DRD SDC10-4 Pressure Reducing,
Relieving,
38 l/min
[10 US gal/min]
207 bar
[3000 psi]
PR - 12
Direct Acting with
Damping Port
* Flow ratings are based on a pressure drop of 7 bar [100 psi] unless otherwise noted. They are for comparison purposes only.
BC332375439105en-000101 • February 2020
PR - 1
Pressure Reducing Valves Technical Information
1
Application Notes
PRESSURE REDUCING
VALVES
Pressure reducing valves are pressure limiting devices that limit pressure in one portion
of a circuit while leaving system pressure unaected. They are available in direct-acting
and pilot-operated types and as pressure reducing/relieving valves or as pressure
reducing valves only.
Pressure reducing valves
DIRECT ACTING
PRESSURE REDUCING /
RELIEVING VALVES
Direct-acting pressure reducing/relieving valves allow ow to pass from 2 to 1 until
the pressure at 1 reaches the predetermined setting, at which point the spool shifts to
restrict input ow from 2 (reducing mode) or to open ow from 1 to 3 (relieving mode)
as needed to maintain the regulated pressure at 1.
Advantages of direct-acting pressure
reducing valves are:
· Fast response
· Economical
A typical application for direct-acting pressure reducing valves is for pressure control in
systems requiring two or more dierent pressure settings. These valves are best suited
for low ow applications such as hydraulic brake or motor shift.
Direct acting pressure reducing valve
23
Applications Notes
BC332375439105en-000101 • February 2020
PR - 2
Pressure Reducing Valves Technical Information
1
Application Notes
Applications Notes
PILOTOPERATED
PRESSURE REDUCING /
RELIEVING VALVES
Pilot-operated pressure reducing/relieving valves operate similarly to direct-acting
pressure reducing/relieving valves -- the spool allows ow to pass from 2 to 1 until the
pressure at 1 reaches the predetermined setting and forces the pilot poppet o it’s
seat. This creates a pressure dierential across the spool that causes the spool to shift
and maintain regulated pressure at 1 in the same manner as the direct-acting pressure
reducing/relieving valve.
Advantages of pilot-operated relief
valves are:
· Smooth, stable response
· High pressure capability
· Precise pressure control with varying
ow rates
A typical application for pilot-operated pressure reducing valves is for pressure control in
systems requiring two or more dierent pressure settings where high pressure capability
and/or extremely precise pressure control is required.
Pilot-operated pressure reducing valve
23
BC332375439105en-000101 • February 2020
PR - 3
Pressure Reducing Valves Technical Information
1,16
1,45
1,74
2
2
1
3
t
t
Regulated
[100-1400]
[500-2400]
Seals
Pressure Reducing, Non-Relieving, Direct Acting
CP230-2
OPERATION
SPECIFICATIONS
DIMENSIONS
mm [in]
This is a direct-acting pressure-reducing
(non-relieving) valve.
Theoretical performance
psi bar
0
0
0
870
580
290
154 SUS (33 cSt) hyd. oil @ 100° F (38° C)
120
100
80
60
Press ure
40
20
0
10L/min
2.6US gal/min
20 30 40 50
Flow
5.3 7.9 10.6 13.
Cross-sectional view
Schematic
Specications
Rated pressure 210 bar [3000 psi]
Rated ow at 7 bar
[100 psi]
Weight 0.25 kg [0.56 lb]
Cavity SDC10-3
40 l/min
[11 US gal/min]
7/8-14 UNF THD
1
23
Press
46.4
Tank
[1.83]
ORDERING
INFORMATION
B=Buna-N 120027
V=Viton 120028
Housing and portsHousing P/N
SE3B=Al,3/8 BSP SDC10-3-SE-3B
SE4B=Al,1/2 BSP SDC10-3-SE-4B
6S =Al, #6 SAE CP10-3-6S
8S =Al, #8 SAE CP10-3-8S
Other housings available
Adjustment option
BC332375439105en-000101 • February 2020
h 1.00 in
41-47 N.m
t
[30-35 lbf.ft]
Type A
adjustment
Type F
adjustment
55.9
[2.20]
Seal kit
0=No Housing No Housing
A= Internal
E= External
F= Tamper resistant
K= Knob
CP230-2-B-6S-A-C - 100
80.0
max.
[3.15]
Crack pressure
Code x 10 = psi
Example: 100 = 1000 psi
Pressure range
A= 4-28 [50-400]
Std. setting 17 [250]
B= 5-55 [75-800]
Std. setting 28 [400]
C= 7-97
Std. setting 69 [1000]
D= 34-166
Std. setting 103 [1500]
bar [psi]
Type E
adjustmen
Type K
adjustmen
PR - 4
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