EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-380.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
Pressure Drop
Description
Overcenter valves give static
and dynamic control of loads
by supplying a counterbalance
pressure to the actuator. They
prevent runaway in the event
of hose burst and hold the
load with minimal leakage.
The pressure balanced valve is
unaffected by back pressure,
allowing service line reliefs
to operate and for the valve
to be used in regenerative or
proportional valve systems.
The overcenter valve should
be mounted either into, onto
or as close to the actuator as
possible to give maximum
protection.
Single overcenter valves
control unidirectional loads
such as in aerial platforms,
cranes or winches and dual
overcenters are suited to
bi-directional motion such as
wheel motor applications or
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 0.14 kg (0.30 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
valve and allow movement
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
5:1
1SEB30 - Overcenter Valve
Fully balanced, pilot assisted relief with check
30 L/min (8 USgpm) • 270 bar (4000 psi)
Pilot (3)
Valve (2)
Cyl (1)
Vent (4)
3
1
2
Flow - US gpm
Flow - L/min
Pressure - psi
750
600
450
300
150
0
0 10 20 30 40 50
0 2.5 5 7.5 10 12.5
Pilot open
Free flow
Pressure - bar
50
40
30
20
10
0
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-381.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
Model Code
1SEB30 F 35 S 5
1 2 3 4 5
1 Function
1SEB30
Dimensions
mm (inch)
1SEB30 - Overcenter Valve
Fully balanced, pilot assisted relief with check
30 L/min (8 USgpm) • 270 bar (4000 psi)
3 Pressure Range
@ 4.8 L/min
Note: Code based on pressure
in bar.
35 - 75-350 bar
Std setting 210 bar
Std setting made at 4.8 L/min
4 Seals
S - Nitrile
(For use with most
industrial hydraulic oils)
SV - Viton (For high
temperature and most
special uid applications)
5 Pilot Ratio
5 - 5:1
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.
Note: Tightening torque of "F"
adjuster locknut - 20 to 25 Nm
Cavity
Model A20090-T11A
Form Drill TD-11A
Form Reamer TR-11A
Cartridge Only
Basic Code
1SEB30
59.0
(2.32)
max
5.0 A/F
17.0 A/F
M20 x 1.5
thread
54.5
(2.15)
25.0
(0.98)
34.8
(1.37)
Ø25.1 (0.99)
Ø29.5 (1.61)
max
Screw in to increase
pressure. Screw out
to release load
25.4 A/F
1
2
3
L.S.
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
– –
