G-58
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 valve port
2 causes the poppet to lift
against the spring force,
allowing the flow to the
cylinder port 1. Reverse flow
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 flow from the cylinder
to valve port.
Features
Hardened and ground poppet
gives excellent flow capabil-
ity 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.
Performance data
4SK140 Series - Check valve
Pilot-to-open, poppet type
140 L/min (37 USgpm) • 350 bar (5000 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.
These valves are ideally
suited for tting directly into
a cylinder, giving economy of
installation, direct control of
cylinder movement and ease
of servicing.
Pressure drop
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
300
225
150
75
0
Piloted open
Free flow
205 10
15 4025 30
35
08020 40
60 160100 120
140
20
15
10
5
2(V)
1(C)
3(P)
3
1
2
Ratings and specifications
Figures based on oil temperature of 40˚ C and viscosity of 32 cSt (150 SUS)
Rated flow 140 L/min (37 USgpm)
Maximum pressure 350 bar (5000 psi)
Pilot ratio 3:1
Cartrid ge material Working parts hardened and ground steel.
Zinc plated body.
Mountin g position
Unrestricted
Cavity n umber A20094-T17A
Torque cartridge in to cavity 200 Nm (150 lbs. ft.)
Weight 0.44 kg (0.96 lbs.)
Seal kit number SK1116
SK1116V
(Nitrile)
(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 ml/min nominal (5 dpm)
Nominal viscosity range 5 to 500 cSt
Viton is a registered trademark of E. I. DuPont
G-59
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
4SK140 Series - Check valve
Pilot-to-open, poppet type
140 L/min (37 USgpm) • 350 bar (5000 psi)
4SK140 3 S 3
Cavity
Basic code A20094-T17A
Form drill TD-17A
Form reamer TR-17A
Cartridge only
Basic code
4SK140
Dimensions
mm (inch)
0.05 A
Thread and
all diameters
-A-
All seal lead-ins
to be smooth
and free of nicks
and sharp edges
0.00
0.00
Locating
shoulder
30º
45º
0.00
R0.80
1. 6
(0.06)
1. 6
(0.06)
1. 6
(0.06)
2
1
3
R0.80
45º
45º
39.73 (1.564)
39.67 (1.562)
Ø
Ø44.45 (1.750)
36.58 (1.440)
36.53 (1.438)
Ø
37.29 (1.468)
37.34 (1.470)
Ø
23.00
(0.91)
min
depth
Ø14.27
(0.56)
Ø22.23
(0.88)
4.78
(0.19)
17.48
(0.69)
Min full
thread
22.23
(0.88)
36.53
(1.44)
46.34
(1.82)
46.22
(1.81)
56.74
(2.23)
M36 x 2.0-6H
Ø25.40 (1.00)
31.80 (1.252)
31.75 (1.250)
Ø
34.21 (1.346)
34.11 (1.343)
Ø
46.00
(1.81)
46.00
(1.81)
31.75 A/F
M36x2.0
2(V)
3(P)
1(C)
––
1 2 3 4
1
Function
4SK140 - Complete valve
3
Seals
S - Nitrile (for use with most
industrial hydraulic oils)
SV - Viton
(for high
temperature and most
special uid applications)
2
Pilot ratio
3 - 3:1
4
Optional pilot seal
Omit if not required