EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-400.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
Ratings and Specifications
Figures based on: Oil Temp = 40°C Viscosity = 32 cSt (150 SUS)
Rated flow 90 L/min (23 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 A20092-T2A
Torque cartridge into cavity 60 Nm (44 lbs ft)
Weight 0.42 kg (0.92 lbs)
Seal kit number SK1093 (Nitrile) SK1093V (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
Viton is a registered trademark of E.I. DuPont
Performance Data
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
4:1 Best suited for applications
where the load remains
relatively constant.
Other ratios available on request.
1SE90 - Overcenter Valve
Pilot assisted relief with check
90 L/min (23 USgpm) • 270 bar (4000 psi)
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.
Pilot (3)
Valve (2)
Cyl (1)
3
1
2
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
240
210
180
150
120
90
60
30
0
16
14
12
10
8
6
4
2
0
0 20 40 60 80 100
0 5 10 15 20 25
Piloted open
Free ow
Sectional View
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-401.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
Model Code
1SE90 F 35 S 4
1 2 3 4 5
1 Function
1SE90
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
@ 4.8 L/min
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):
175-350 bar
Std setting 210 bar
(10:1): 90-350 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
4 - 4:1
Other ratios available upon request
Dimensions
mm (inch)
1SE90 - Overcenter Valve
Pilot assisted relief with check
90 L/min (23 USgpm) • 270 bar (4000 psi)
Cavity
Model A20092-T2A
Form Drill TD-2A
Form Reamer TR-2A
Cartridge Only
Basic Code
1SE90
Ø38.10 (1.50)
0.05
A
Thread and
all diameters
-A-
Ø33.32 (1.31)
Ø
27.43 (1.079)
27.38 (1.077)
Ø
26.24 (1.033)
26.19 (1.031)
0.00
30º
Ø
26.67 (1.050)
26.77 (1.053)
Min optional drill Ø
for socket clearance
45º
1-14UNS-2B
1.6
(0.06)
1.6
(0.06)
1.6 (0.06)
3
1
2
45º
R0.80
Ø17.48 (0.69)
Ø
22.28 (0.877)
22.23 (0.875)
1.6
(0.06)
Ø
23.80 (0.937)
23.70 (0.933)
3.96
(0.16)
0.30 (0.011) x 45º max
15.88 (0.63)
Min
full thread
26.59
(1.05)
35.24 (1.387)
35.12 (1.382)
17.48
(0.69)
45.24
(1.78)
Ø15.88
(0.63)
18.26
(0.72)
5.56
(0.22)
18.26
(0.72)
min
28.57
(1.12)
Ref
Locating
shoulder
0.00
Ø9.53
(0.38)
– –
Note: Tightening torque of "F"
adjuster locknut - 20 to 25 Nm.
84.0
(3.31)
max
Screw in to
increase pressure
Screw out to
release load
74.5
(2.93)
34.0
(1.34)
34.9
(1.37)
Ø37.0 (1.46)
max
Ø31.7
(1.25)
1
2
3
5.0 A/F
17.0 A/F
31.75 A/F
1”-14-UNS
thread
L.S.
