G-42
G
Where measurements are critical request certied drawings. We reserve the right to change specications without notice.
Eaton Hydraulic Screw-in Cartridge Valves (SiCV) E-VLSC-MC001
-E—January 20
18 www.eaton.com
4CK30 - Check valve
Pilot-to-open, poppet type
30 L/min (8 USgpm) • 350 Bar (5000 psi)
Description
Pilot check valves allow ow
to pass in one direction, with
a low pressure drop, then
prevent reverse ow until pilot
pressure is applied. There
are many applications for this
valve type, the most common
being to lock and hold a
cylinder, or another hydraulic
actuator, in position.
These valves are ideally
suited for tting directly into
a cylinder, giving economy of
installation, direct control of
cylinder movement and ease
of servicing.
Operation
Pressure on the valve port
2 causes the poppet to lift
against the spring force,
allowing the ow to the
cylinder port 1. Reverse ow
is prevented by the poppet
reseating. Pressure applied to
the pilot port 3 will overcome
the cylinder port pressure and
lift the poppet from its seat,
allowing ow from the cylinder
to valve port.
Features
Hardened and ground poppet
gives excellent ow capability
for valve size, positive
sealing and long working
life. Cartridge construction
allows installation in actuators,
manifold blocks and Hydraulic
Integrated Circuits. Fits the
same cavity as the overcenter
valves of a similar size.
Pressure drop
Sectional view
Performance data
Flow - L/min
Flow - US gpm
0 2.5 5.0 7.5 10 12
0 10 20 30 40 50
350
300
250
200
150
100
50
0
24.5
21
17.5
14
10.5
7
3.5
0
Free ow
Piloted open
Pressurep - psi
Pressure - bar
Pilot
(3)
Valve (2)
Cyl (1)
3
1
2
Ratings and specifications
Figures based on: Oil Temp = 40°C Viscosity = 32 cSt (150 SUS)
Rated flow 30 L/min (8 USgpm)
Max setting 350 bar (5000 psi)
Pilot ratio 3:1
Cartridge material Working parts hardened & ground steel.
Electroless zinc plated body.
Standard housing material Standard aluminium (up to 210 bar)
Add suffix “377” for steel option
Mountin g position Unrestricted
Cavity n umber A 6610 (See section M)
Torque cartridge into cavity 45 Nm (33 lbs ft)
Weight 4CK30
4CK35
4CKK35
0.08 kg
0.34 kg
0.76 kg
(0.18 lbs)
(0.75 lbs)
(1.67 lbs)
Seal kit number SK430 (Nitrile) SK430V (Viton
®
)
Recommended filtration level BS5540/4 Class 18/13 (25 micron nominal)
Operating temperature -30°C to +90°C (-22° to +194°F)
Leakage 0.3 milliliters/min nominal (5 dpm)
Nominal viscosity range 5 to 500 cSt
Viton is a registered trademark of E.I. DuPont
G-43
G
Where measurements are critical request certied drawings. We reserve the right to change specications without notice.
Eaton Hydraulic Screw-in Cartridge Valves (SiCV) E-VLSC-MC001
-E—January 20
18 www.eaton.com
4CK30 - Check valve
Pilot-to-open, poppet type
30 L/min (8 USgpm) • 350 Bar (5000 psi)
Dimensions
mm (inch)
Cartridge only
Basic code
4CK30
Single valve
3/8", 1/2" Ports
Basic code 4CK35
Dual valve
3/8", 1/2" Ports
Basic code 4CKK34
Internally cross piloted
Model code
ote:N For applications above 210
bar (3000 psi) please consult our
technical department or use the
steel body option.
11.5
(0.45)
2 holes Ø9.0 (0.35) thro’
60.0
(2.36)
16.0
(0.63)
31.8 (1.25)
1
2
3
60.0
(2.36)
26.5
(1.04)
9.0
(0.35)
32.0
(1.26)
63.5 (2.50)
9.0
(0.35)
42.0
(1
.65)
39.5
(1.56)
Pilot (3)
24.0 A/F
7. 0
(0.28)
max
M20 x 1.5-6g
Valve (2)
Cyl (1)
26.5
(1.04)
2 holes Ø9.0 (0.35) thro’
63.5
(2.50)
16.0 (0.63)
31.7 (1.25)
70.0 (2.76)
31.7
(1.25)
V1
C2
C1
V2
57. 0
(2.24)
9.8
(0.39)
101.6 (4.00)
82.0 (3.23)
–– 4CK**** 1 3W S 3
1 2 3 4 5
Code Port size Housing number - body only
Aluminium
single
Steel
single
Aluminium
double
Steel
double
3W 3/8" BSP. 1/4" BSP Pilot Port B6743 B12823 B6836 B13803
6T 3/8" SAE. 1/4" SAE Pilot Port B10536 B10805
8T 1/2" SAE. 1/4" SAE Pilot Port B7884 84811 B30237B11812
1
Basic code
4CK30 - Cartridge Only
4CK35 - Cartridge and Body
4CKK34 - Cartridges and
Dual Body
2
Pilot port size
1 - Internal
3
Port sizes
4
Seals
S - Nitrile (For use with most
industrial hydraulic oils)
SV - Viton (For high
temperature and most
special uid applications)
5
Optional pilot seal
Omit if not required
