G-44
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
Sectional view
4CK90 - Check valve
Pilot-to-open, poppet type
90 L/min (24 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
Performance data
0 20 40 60 80 100
Flow - L/min
0 5 10 15 20 25
Flow - US gpm
22
16.5
11
5.5
0
Pressurep - bar
Piloted open
Free ow
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 90 L/min (24 USgpm)
Max pressure 350 bar (5000 psi)
Pilot ratio 4:1
Cartridge material Working parts hardened and 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 A12336 (See Section M)
Torque cartridge into cavity 90 Nm (66 lbs ft)
Weight 4CK90
4CK95
4CKK95
0.27 kg (0.61 lbs)
1.33 kg (2.90 lbs)
2.03 kg (4.51 lbs)
Seal kit number SK832 (Nitrile)
SK832V (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-45
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
Dimensions
mm (inch)
Cartridge only
Basic code
4CK90
Complete valve
1/2" Ports
Basic code
4CK95
4
Seals
S - Nitrile (For use with most
industrial hydraulic oils)
SV - Viton (For high
temperature and most
special uid applications)
4CK90 - Check valve
Pilot-to-open, poppet type
90 L/min (24 USgpm) • 350 bar (5000 psi)
Model code
3
Port sizes
1
Basic code
4CK90 - Cartridge Only
4CK95 - Cartridge and Body
4CKK95 - Cartridges and
Dual Body
2
Pilot port sizes
1 - Internal
Dual valve
1/2" Ports
Basic code 4CKK95
Internally Cross Piloted
5
Optional pilot seal
Omit if not required
18.5
(0.73)
max
51. 0
(2.00)
Cyl (1)
Valve 2
Pilot (3)
M27 x 1.5-6g
32.0 A/F
36.0
(1.42)
2 holes Ø11.0 (0.43) thro’
70.0
(2.76)
19.0
(0.75)
38.1
(1.25)
2
1
38.1
(1.25)
58.0
(2.28)
2
1
3
18.0
(0.71)
88.5
(3.48)
max
10.0
(0.39)
56.0
(2.20)
76.2 (3.00)
ote:N For applications above 210
bar (3000 psi) please consult our
technical department.
36.00
(1.42)
70.0
(2.76)
58.0
(2.28)
19.0
(0.75)
38.1
(1.50)
86.5 (3.40)
40.5
(1.59)
88.5
(3.48)
max
107.0 (4.21)
127.0 (5.0)
2 holes Ø11.0 (0.43) thro’
10.0
(0.39)
V1
V2
C1
C2
Code Port size Housing number - body valves only
Aluminium
single
Steel
single
Aluminium
double
Steel
double
4W 1/2" BSP 1/4" BSP Pilot Port B13625 B13626 C13627C13628
8T 1/2" SAE 1/4" SAE Pilot Port B10806 B10922 C10807C11561
––
1 2 3 4 5
4CK*** 1 4W S 3
