Accessories
18.14
Cartridge Valves Technical Information
Accessories
520L0588 • Rev DB • November 2010
Pilot pistons
OPERATION Pilot pistons used with check valve cartridges are an economical way to create pilot-
operated check valve functions in custom Hydraulic Integrated Circuits (HIC).
EXAMPLE Application of pilot pistons
Pilot
piston
Check valve
W
W
W
Lifting
Load holding
Lowering
P103 082
Pilot pistons
Accessories
18.15
Cartridge Valves Technical Information
Accessories
520L0588 • Rev DB • November 2010
Single-acting pilot pistons
Series Compatible
valves
Pilot
ratio
Seals (optional) Pilot piston
order code
A
mm [in]
B
mm [in]
Bore diameter*
mm [in]
8 CV08-NP 4:1 1) 720092 O-rings
2) 720500 back-up rings
621460 26.97
[1.062]
14.27
[0.562]
Ø 12.70 ± 0.03
[0.501 ± 0.001]
A
B
P103 074
10 CV10-NP 4:1 1) 720178 O-ring
2) 720412 back-up rings
621175 44.45
[1.750]
25.40
[1.000]
Ø 15.90 ± 0.03
[0.626 ± 0.001]
A
B
P103 075
621176 47.63
[1.875]
28.58
[1.125]CP100-3 2.5:1
621535 38.10
[1.500]
19.05
[0.750]
12 CP101-1 4:1 1) 720031 O-ring
2) 720385 back-up rings
621538 60.33
[2.375]
34.93
[1.375]
Ø 22.25 ± 0.03
[0.876 ± 0.001]
A
B
P103 076
16 CP102-1 4:1 1) 720033 O-ring
2) 720375 back-up rings
620600 60.20
[2.370]
23.55
[0.927]
Ø 28.63 ± 0.03
[1.127 ± 0.001]
A
B
P103 077
Consult factory for bore details.
Pilot pistons
Pilot pistons
Accessories
18.16
Cartr idge Valves Technical Information
Accessories
520L0588 • Rev DB • November 2010
Double-acting pilot pistons
Series Compatible
valves
Pilot
ratio
Seals (optional) Pilot piston
order code
A
mm [in]
B
mm [in]
Bore diameter*
mm [in]
8 CV08-NP 4:1 1) 720092 O-rings
2) 720500 back-up rings
621457 41.28
[1.625]
14.27
[0.562]
Ø 12.70 ± 0.03
[0.501 ± 0.001]
A
B
B
P103 078
621553 52.37
[2.062]
19.84
[0.781]
625138 38.10
[1.500]
12.70
[0.500]
625298 49.53
[1.950]
18.42
[0.725]
10 CV10-NP 4:1 1) 720178 O-ring
2) 720412 back-up rings
621058 60.50
[2.382]
20.73
[0.816]
Ø 15.90 ± 0.03
[0.626 ± 0.001]
A
BB
P103 079
621400 57.15
[2.250]
19.05
[0.750]
CP100-3 2.5:1 621692 69.85
[2.750]
25.40
[1.000]
625104 66.04
[2.600]
23.50
[0.925]
12 CP101-1 4:1 1) 720031 O-ring
2) 720385 back-up rings
621539 82.55
[3.250]
28.58
[1.125]
Ø 22.25 ± 0.03
[0.876 ± 0.001]
A
B
B
P103 080
16 CP102-1 4:1 1) 720033 O-ring
2) 720375 back-up rings
621540 XXX XXX Ø 28.63 ± 0.03
[1.127 ± 0.001]
A
B
B
Consult factory for bore details.
Pilot pistons
Pilot pistons