G-62
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
Flow - L/min
Pressure - psi
Pressure - bar
Flow - US gpm
0 10 20 30 40 50
0 2.5 5 7.5 10 12.5
750
600
450
300
150
0
50
40
30
20
10
0
C2-V2
C1-V1
Flow - L/min
Pressure - psi
Pressure - bar
Flow - US gpm
0 10 20 30 40 50
0 2.5 5 7.5 10 12.5
750
600
450
300
150
0
50
40
30
20
10
0
V1-C1
V2-C2
Operation
Pressure on the valve port
causes the poppet to lift
against the spring force,
allowing the ow to the
cylinder port. Reverse ow
is prevented by the poppet
reseating. Pressure applied to
the pilot port will overcome
the cylinder port pressure
and lift the poppet from its
seat, allowing ow from the
cylinder to valve port.
In dual pilot check valves,
each pilot section is cross
connected to the opposite
line giving automatic pilot
operation in both directions.
When the pressure in C2
rises above the setting of the
relief valve, the relief valve
will open, allowing ow to the
V2 port, relieving pressure on
thecylinder.
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.
Pressure drop
Performance data
4CKKT - Check valve
Dual, pilot-to-open with thermal relief
25 L/min (6.6 USgpm) • 300 bar (4350 psi)
Sectional view
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.
A pilot relief valve will protect
the cylinder and hoses from
thermal expansion of the
hydraulic uid. The maximum
ow through the relief is
1.0l/min.
Free ow
Piloted open
1
2 3
4
1
2
3
Ratings and specifications
Figures based on oil temperature of 40˚ C and viscosity of 32 cSt (150 SUS)
Rated flow 25 L/min (6.6 USgpm)
Maximum pressure 300 bar (4350 psi)
Pilot ratio 3:1
Cartrid ge material
Working parts hardened and ground steel. Electroless zinc plated body.
Standard housing material
Standard aluminum (up to 210 bar). Add suffix "377"' for steel option.
Mountin g position Unrestricted
Cavity n umber A12744 (See Section M)
Torque cartridge in to cavity 30 Nm (22 lbs. ft.)
Weight 4CKKT50 0.08 kg (0.18 lbs)
4CKKT55 0.34 kg (0.75 lbs)
Seal kit number SK1120 (Nitrile)
SK1120V (Viton
®
))
Recommended filtration level BS5540/4 Class 18/13 (25 micron nominal)
Operating temperature –30° to +90° C (-22° to +194°F)
Leakage C1 - V1 1.0 ml/min nominal (15 dpm)
C2 - V2 0.3 ml/min nominal (5 dpm)
Nominal viscosity range 5 to 500 cSt
Viton is a registered trademark of E. I. DuPont
G-63
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
Model code
3
Pilot Ratio
3 - 3:1
4
Seals
S - Nitrile (For use with most
industrial hydraulic oils
SV - Viton
(For high
temperature and most
special uid applications)
1
Basic code
4CKKT50 - Cartridge only
4CKKT55 - Cartridge and body
2
Port size - bodied valves only
4CKKT - Check valve
Dual, pilot-to-open with thermal relief
25 L/min (6.6 USgpm) • 300 bar (4350 psi)
5
Optional Pilot Seal
3 - Standard
Omit if not required
6
Pressure Setting
24 - 240 bar (3500 psi)
28 - 280 bar (4000 psi)
35 - 350 bar (5000 psi)
4CKKT** 3W 3 S
28
3
Dual valve
3/8" Ports
4CKKT55 Internally Cross -Piloted
Cartridge only
Basic code
4CKKT50
Description
mm (inch)
ote:N For applications above
210 bar (3000 psi) please consult
our technical department or use
the steel body option.
18.00
(0.71)
68.00
(2.68)
25.40 A/F
(1” A/F)
1(C2)
2(V2)
3(V1)
4(C1)
7/8”-14-UNF
34.50
(1.39)
2 holes
Ø7.1 (0.28)
thro’
1
2
4
3
73.20
(2.88)
31.80
(1.50)
6.35
(0.25)
50.80
(2.00)
18.50
(0.73)
50.50
(1.99)
18.00
(0.71)
82.60
(3.25)
16.00
(0.63)
31.80
(1.25)
–– –
1 2 63 4 5
Code Port size Housing number
Aluminium dual
3W 3/8" BSPB19240
6T 3/8" SAE B19241
4W 1/2" BSPB19228
8T 1/2" SAE B19229