G-66
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
5CK30 - Check valve
Pilot-to-close. ball type
30 L/min (8 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)
Cyl (1)
V
alve (2)
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
362.0
290.0
217.5
145.0
72.5
0
25
20
15
10
5
0
0 10 20 30 40 50
0 2.5 5 7.5 10 12.5
Free ow
Ratings and specifications
Figures based on oil temperature of 40˚ C and viscosity of 32 cSt (150 SUS)
Rated flow 30 L/min (8 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 6610 (See Section M)
Torque cartridge in to cavity 45 Nm (33 lbs. ft.)
Weight 0.08 kg (0.18 lbs)
Seal kit number SK829 (Nitrile
SK829V (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-67
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
5CK30 - Cartridge only
5CK35 - Cartridge & 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
2
Pilot port size
1 - Internal
Omit for line valves
5CK30 - Check valve
Pilot-to-close. ball type
30 L/min (8 USgpm) • 350 bar (5000 psi)
2
3
Port size - bodied valves only
5CK*** 1 3W S
Cartridge only
Basic code
5CK30
Single valve
3/8", 1/2" Ports
Basic code
5CK35
ote:N For applications above
210 bar (3000 psi) please consult
our technical department or use
the steel body option.
Dimensions
mm (inch)
7.0 (0.28)
max
39.5
(1.56)
M20 x 1.5-6
g
24.0 A/F
Pilot (3)
Cyl (1)
Valve (2)
31.8
(1.25)
2 holes Ø9.0 (0.35) thro’
16.0
(0.63
11.5
(0.45
60.0
(2.36)
26.5
(1.04)
60.0
(2.36)
1
2
3
9.0 (0.35)
32.0 (1.26)
9.0
(0.35)
63.5 (2.5)
42.0
(1.65)
––
1 2 3 4 5
Code Port size Housing number
Aluminum Steel
3W 3/8" BSP 1/4" BSP Pilot Port B6743 B12823
6T 3/8" SAE 1/4" SAE Pilot Port B10536
8T 1/2" SAE 1/4" Pilot Port B11811