10-49
Catalogue HY11-3500/UK
Parker Hannifin GmbH & Co. KG
Hydraulic Controls Division
Kaarst, Germany
10
CP_UK.INDD RH
Pilot Operated Check Valve
Series CP / 9CPCharacteristics / Ordering Code
Ordering code
Code
Thread
omit
NPTF
9
BSPP
Code Pilot ratio Stage
5 5 : 1 1
40 40 : 1 2
Code Size
600 3/8
1200 3/4
Pilot operated check valves of the series CP allow free
flow in one direction (A to B).
The counter direction (B to A) is blocked. By applying pilot
pressure, the poppet can be lifted from its seat against
the pressure in port B. Thus flow in the counter direction
is also possible. There are 1 and 2 stage poppets avail-
able with pilot ratios of 1 : 5 and 1 : 40, to suit different
operating conditions.
Pilot ratios
Poppet 1 stage
Surface ratio 5 : 1 (pilot
spool-poppet surface) for
quick response time with-
out decompression.
Surface ratio 40 : 1 (pilot
spool decompression pin
surface) for low shock or
oscillation performance
from decompression.
Size 600 1200
Max. operating pressure [bar] 210 210
Max. pilot pressure [bar] 210 70
Flow Q
max
at ∆p 2.7bar [l/min] 30 95
Nominal size 3/8 3/4
Weight [kg] 4 7
Technical data
Poppet 2 stage
S
CP M
Steel
poppet
Check
valve, pilot
operated
Steel
body
Thread
type
Pilot
ratio
Seal
—
Threaded
port
Port
size
Code
Seal
omit
NBR
V
FPM
10-50
CP_UK.INDD RH
Catalogue HY11-3500/UK
Parker Hannifin GmbH & Co. KG
Hydraulic Controls Division
Kaarst, Germany
10
Pilot Operated Check Valve
Series CP / 9CPCharacteristic Curves / Dimensions
Size A a, B L
3
B
1
B
2
H
1
H L
4
L
7
H
4
L L
1
H
2
H
3
L
6
L
5
Ød W
9CP600S G3/8 53.3 50.8 25.4 38.1 76.2 25.4 76.2 10.4 120.7 10.7 9.4 66.5 9.4 111 9.1 -
9CP1200S G3/4 63.5 63.5 31.8 50.8 101.6 31.8 91.2 10.7 152.4 11.43 11.2 90.4 11.2 141.2 10.7 7.9
∆p/Q performance curves
The curves refer to hydraulic oil of 33 cSt and 50°C.
Dimensions
