6-19
CPS.PMD CM
Pilot-Operated Check Valve
Series CPS
Catalogue HY11-2500/UK
6
Parker Hannifin GmbH & Co. KG
Hydraulic Controls Division
Kaarst, Germany
Size 600 1200
Max. working 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
Pilot-operated check valves of the series CPS provide
free flow in one direction (A to B).
The counter-direction flow (B to A) is blocked. By apply-
ing a pilot pressure, the poppet can be lifted from its seat
against the pressure in port B. Thus flow in the counter-
direction is made possible. There are 1 and 2 stage pop-
pets available with pilot ratios of 1 : 5 and 1 : 40, to suit
different operating conditions.
Characteristics / Ordering Code
Poppet 1 stage
Poppet 2 stage
Pilot ratios
Port
size
M
Steel
poppet
Pilot
ratio
Manifold
mounting
Pilot-
operated
check
valve
S
Steel
body
Port size
3/8"
3/4"
CP
Code
600
1200
Seal
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.
Technical data
Ordering code
Seal
NBR
FPM
Code
omit
V
Code Pilot ratio Stage
55 : 11
40 40 : 1 2
S
6-20
CPS.PMD CM
Pilot-Operated Check Valve
Series CPS
Catalogue HY11-2500/UK
6
Parker Hannifin GmbH & Co. KG
Hydraulic Controls Division
Kaarst, Germany
Performance Curves / Dimensions
Size L3 L2 L1 L9 L11 HH1 H2 H3 L10 L8 L7 L6 B3 B2 B1 BØHL5 L4
CPS600S 76.2 101.6 120.7 10.7 1.0 50.8 25.4 12.7 7.9 - 108.0 60.2 12.7 8.6 38.1 67.3 76.2 11.2 21.3 53.3
CPS1200S 93.7 127.0 152.4 11.4 1.0 63.5 31.8 12.7 10.2 7.9 136.4 76.2 15.7 10.2 50.8 91.2 101.6 19.1 25.4 63.5
6 mounting screws
M6 for size 600
6 mounting screws
M8 for size 1200
∆∆
∆∆
∆p/Q performance curves
The curves refer to hydraulic oil of 33 cSt and 50°C.
Dimensions
