G-70
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
5CK300 - Check valve
Pilot-to-close, ball type
250 L/min (65 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
Pilot (3)
Valve (2)
Cyl (1)
Flow - US
gp
m
Flow - L/min
Pressure - psi
Pressure - bar
348.0
304.5
261.0
217.5
174.0
130.5
87.0
43.5
0
24
21
18
15
12
9
6
3
0
0 100 200 300 400
0 25 50 75 100
Free ow
3
2
1
Ratings and specifications
Figures based on oil temperature of 40˚ C and viscosity of 32 cSt (150 SUS)
Rated flow 250 L/min (65 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 A 6935
Torque cartridge in to cavity 150 Nm (11 0 lbs. ft.)
Weight 0.28 kg (0.62 lbs)
Seal kit number SK834 (Nitrile)
SK834V (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-71
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
1
Basic code
5CK300 - Cartridge only
5CK350 - Cartridge & body
Model code
2
Pilot port size
1 - Internal
Omit for line valves
5CK300 - Check valve
Pilot-to-close, ball type
250 L/min (65 USgpm) • 350 bar (5000 psi)
2
3
Port size - bodied valves only
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
5CK*** 1 10W S
Single valve
1 1/4" Ports
Basic code
5CK350
Cartridge only
Basic code
5CK300
ote:N For applications above
210 bar (3000 psi) please consult
our technical department or use
the steel body option.
Dimensions
mm (inch)
69.5
(2.74)
max
Cyl (1)
33.0
(1.30)
max
Pilot (3)
Valve (2)
46.0 A/F
1-5/8-12 UN-2A
23.5
(0.93)
2 holes Ø10.5 (0.41) thro’
101.6
(4.00)
31.8 (1.25)
63.5
(2.50)
3
2
1
80.0
(3.15)
10.5
(0.41)
49.0
(1.93)
135.0
(5.31)
max
8.5 (0.33)
80.0
(3.15)
97.0 (3.82)
––
1 2 3 4 5
Code Port size Housing number- body only
Aluminum Steel
10W
1 1/4" BSP
1/4" BSP/SAE Pilot Port
B6814
B8610
20T
1 1/4" SAE
1/4" BSP/SAE Pilot Port
B10630
B11474