G-68
G
Where measurements are critical request certied drawings. We reserve the right to change specications without notice.
Eaton Hydraulic Screw-in Cartridge Valves (SiCV) E-VLSC-MC001
-E—January 20
18 www.eaton.com
Operation
Pressure on the cylinder port
causes the ball to lift against
the spring force, allowing ow
through to the valve port.
Reverse ow is prevented by
the ball reseating. Pressure
applied to the pilot port will
hold the ball against its seat,
preventing ow from cylinder
to valve.
Features
Easy ow path gives
good pressure to ow
characteristics and hardened
components ensure a long
working life. Cartridge
construction allows installation
in actuators, manifold blocks
and Hydraulic Integrated
Circuits. They t the
same cavities as the 4CK
pilot-to-open check valves, so
care should be taken when
selecting the valve.
Performance data
5CK120 - Check valve
Pilot-to-close, ball type
120 L/min (32 USgpm) • 350 bar (5000 psi)
Sectional view
Description
Pilot to close check valves
allow ow to pass in one
direction, with a low pressure
drop to prevent reverse ow.
When the pilot pressure is
applied, ow is prevented in
either direction. The pilot ratio
of 2:1 allows a lower pressure
in the pilot line to hold the
valve closed.
The 5CK series are check
cartridges ideally suited
for tting directly onto a
cylinder. They are ideal for
use in regenerative circuits,
accumulator dump circuits
and in control of cylinders or
motors.
Pressure drop
3
2
1
Pilot (3)
Valve (2)
Cyl (1)
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
145
116
87
58
29
0
10
8
6
4
2
0
0 30 60 90 120 150
0 8 16 24 32 40
Free ow
Ratings and specifications
Figures based on oil temperature of 40˚ C and viscosity of 32 cSt (150 SUS)
Rated flow 120 L/min (32 USgpm)
Maximum pressure 350 bar (5000 psi)
Pilot ratio 2:1
Cartrid ge material Working parts hardened and ground steel.
Zinc ni ckel plated body.
Standard housing material Standard aluminum (up to 210 bar*).
Add suffix“ 377” for steel option.
Mountin g position Unrestricted
Cavity n umber A877
Torque cartridge in to cavity 100 Nm (74 lbs. ft.)
Weight 0.28 kg (0.62 lbs)
Seal kit number SK833 (Nitrile)
SK833 (Viton
®
)
Recommended Filtration level BS5540/4 Class 18/13 (25 micron nominal)
Operating temperature –30° to +90° C (-22° to +194°F)
Leakage 0.3 ml/min n ominal (5 dpm)
Nominal viscosity range 5 to 500 cSt
Viton is a registered trademark of E. I. DuPont
G-69
G
Where measurements are critical request certied drawings. We reserve the right to change specications without notice.
Eaton Hydraulic Screw-in Cartridge Valves (SiCV) E-VLSC-MC001
-E—January 20
18 www.eaton.com
2
Pilot port size
1 - Internal
Omit for line valves
1
Function
5CK120 - Cartridge only
5CK125 - Cartridge and body
Model code
4
Seals
S - Nitrile (for use with most
industrial hydraulic oils)
SV - Viton
(for high
temperature and most
special uid applications)
5
Pilot Ratio
2 - 2:1
5CK120 - Check valve
Pilot-to-close, ball type
120 L/min (32 USgpm) • 350 bar (5000 psi)
2
3
Port size
5CK*** 1 3W S
Single valve
3/4", 1" Ports
Basic code
5CK125
Cartridge only
Basic code
5CK120
ote:N For applications above
210 bar (3000 psi) please consult
our technical department or use
the steel body option.
Dimensions
mm (inch)
15.0
(0.59)
max
Valve (2)
38.1 A/F
Pilot (3)
C
y
l
(
1
)
1-5/16-12 UN-2
A
55.5
(2.19)
37.0
(1.46)
2 holes
Ø10.5 (0.41)
thro’
101.6
(4.0)
25.4
(1.0)
50.8 (2.0)
3
2
1
117.0
(4.60)
max
12.6
(0.50)
76.0
(2.99)
13.0
(0.51)
44.0
(1.73)
83.0 (3.26)
––
1 2 3 4 5
Code Port size Housing number
Aluminum Steel
6W 3/4" BSP 1/4" BSP/SAE Pilot Port B6898B5544
12T 3/4" SAE 1/4" SAE Pilot Port B8200
16T 1" SAE 1/4" SAE Pilot Port B10708B11814