EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-360.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
Operation
The check section allows
free flow into the actuator
then holds and locks the load
against movement. The pilot
assisted relief valve section
will give controlled movement
when pilot pressure is applied.
The relief section is normally
set to open at a pressure at
least 1.3 times the maximum
load induced pressure but the
pressure required to open the
valve and allow movement
Pressure Drop
Description
Overcenter valves give static
and dynamic control of loads
by regulating the flow into and
out of hydraulic actuators. When
installed close to or within an
actuator, the overcenter valve
will stop runaway in the event
of hose burst and if open
center directional control valves
are used, will allow thermal
expansion relief of the hydraulic
fluid.
The overcenter cartridge is
ideal for mounting directly into
a cavity machined in the body
of the cylinder, motor or rotary
actuator. The cartridge can also
be mounted directly to the
ports via a specifically machined
body as part of a Hydraulic
Integrated Circuit or single unit,
or contained within one of our
standard line bodies.
Single overcenter valves are
normally used when the load
is unidirectional, for example
an aerial platform or crane
and dual overcenter valves
are used for controlling loads
in both directional for motor
applications or for cylinders
going over center.
Ratings and Specifications
Figures based on: Oil Temp = 40˚C Viscosity = 32 cSt (150 SUS)
Rated flow 30 L/min (8 USgpm)
Max relief setting 350 bar (5000 psi)
Max load induced pressure 270 bar (4000 psi
Cartridge material Working parts hardened and ground steel.
External steel surfaces zinc plated.
Mounting position Unrestricted
Cavity number A20090-T11A
Torque cartridge into cavity 45 Nm (33 lbs ft)
Weight 0.15 kg (0.33 lbs)
Seal kit number SK1079 (Nitrile)
SK1079V (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 milliliters/min nominal (5 dpm)
Nominal viscosity range 5 to 500 cSt
Performance Data
Sectional View
depends on the pilot ratio of
the valve. For optimization
of load control and energy
usage, a choice of pilot ratios
is available.
The pressure required to open
the valve and start actuator
movement can be calculated
as follows:
Pilot Pressure =
(Relief Setting) - (Load Pressure)
Pilot Ratio
Features
Cartridge is economical and
fits simple cavity. Allows quick,
easy field service - reduces
down time. Interchangeable
with pilot check valve of a
similar size.
Pilot Ratio
2.5:1 Best suited for extremely
unstable applications such
as long booms or flexible
frameworks.
5:1 (standard) Best suited for
applications where load varies
and machine structure can
induce instability.
10:1 Best suited for applications
where the load remains
relatively constant.
1SE30 - Overcenter Valve
Pilot assisted relief with check
30 L/min (8 USgpm) • 270 bar (4000 psi)
Pilot (3)
Valve (2)
Cyl (1)
3
1
2
2.5:1 and 5:1 version 10:1 version
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
750
600
450
300
150
0
50
40
30
20
10
0
Free ow
Pilot open
0 10 20 30 40
0 2.5 5 7.5 10
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
750
600
450
300
150
0
50
40
30
20
10
0
0 10 20 30 40 50
0 2.5 5 7.5 10 12.5
Pilot open
Free ow
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-361.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
Model Code
1SE30 F 35 S 5
1 2 3 4 5
1 Function
1SE30
2 Adjustment Means
F - Screw Adjustment
N - Fixed - State pressure
setting required
For xed versions add setting in 10
bar increments to end of part number.
Subject to a ±10% tolerance.
3 Pressure Range
Note: Code based on pressure
in bar.
20 - (All pilot ratios):
70-225 bar.
Std setting 100 bar
35 - (2.5:1 and 5:1): 70-350 bar.
Std setting 210 bar
(10:1): 90-350 bar.
Std setting 210 bar
Std setting made at 4.8 L/min
Other pressure ranges available
on request
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 - 2.5:1
5 - 5:1
10 - 10:1
Dimensions
mm (inch)
1SE30 - Overcenter Valve
Pilot assisted relief with check
30 L/min (8 USgpm) • 270 bar (4000 psi)
Cavity
Model A20090-T11A
Form Drill TD-11A
Form Reamer TD-11A
Cartridge Only
Basic Code
1SE30
– –
Note: Tightening torque
of “F” adjuster locknut -
20 to 25 Nm.
0.05
A
-A-
Ø31.75 (1.25)
Ø25.40 (1.00)
21.87 (0.861)
21.82 (0.859)
Ø
20.68 (0.814)
20.63 (0.812)
Ø
Min optional drill Ø
for socket clearance
1.6
(0.06)
1.6
(0.06)
1.6
(0.06)
1
3
2
M20 x 1.5-6H
30º
45º
0.00
0.00
0.00
21.11 (0.831)
21.21 (0.835)
Ø
45º
Location
shoulder
3.96
(0.16)
12.70
(0.50)
min full
thread
27.38
(1.08)
18.31
(0.72)
35.18
(1.385)
35.05
(1.379)
41.28
(1.62)
23.83
(0.94)
Ref
Thread and
all diameters
R0.50
0.25 (0.01) x 45º max
R0.50
Ø13.49 (0.53)
18.64 (0.733)
18.54 (0.729)
Ø
17.50 (0.688)
17.45 (0.687)
Ø
Ø17.48
(0.69)
Ø10.72
(0.42)
18.26
(0.72)
5.56
(0.22)
17.48
(0.69)
min
depth
81.3
(3.20)
72.0
(2.83)
19.0
(0.75)
34.8
(1.37)
L.S.
1
2
3
Ø25.1 (0.99)
max
Screw in to
increase pressure
Screw out to
release load
17.00 A/F
22.22 A/F
M20 x 1.5 thread
