EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-430.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 and then locks the load
against movement. The pilot
assisted relief valve section
will give controlled movement
when pilot pressure is applied,
maintaining a counterbalance
pressure to prevent initial
Pressure Drop
Description
The 1SEL overcenter valve
performs all duties of a regular
overcenter but maintains
a counterbalance pressure
to provide dampening of
cylinders when there is a
rapid loss in stored pressure.
This counterbalance pressure
reduces as the pilot pressure
increases. Typical applications
include extension cylinders on
telescopic handlers where it
is important to have a smooth
operation when retracting
from full extension.
Ratings and Specifications
Figures based on: Oil Temp = 40˚C Viscosity = 32 cSt (150 SUS)
Rated flow 90 L/min (23 USgpm)
Max setting 380 bar (5510 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)
Operation 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
Sectional View
pressure loss and therefore
instability. The total pressure
setting will normally be set
at 1.3 times the load induced
pressure. The counterbalance
pressure reduces as the pilot
pressure increases.
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
Primary 5.6:1
Secondary 0.7:1
1SEL90 - Overcenter Valve
Counterbalance, pilot assisted relief with check
90 L/min (23 USgpm) • 380 bar (5510 psi)
Note: This valve has been
designed to eliminate
instability from flexible boom
applications or where the
load induced pressure varies
greatly. To get the best
results, the settings should
be adjusted for each
application and then factory
set for porduction quantities.
Please contact Technical
Department for more
information.
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
Pilot (3)
Valve (2)
Cyl (1)
1
2
3
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-431.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
Model Code
1SEL90 F 30 S 220 60
1 2 3 4 5 6
1 Function
1SEL90 -
2 Adjustment Means
Counterbalance Setting
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.
4 Seals
S - Nitrile (For use with most
industrial hydraulic oils)
SV - Viton (For high
temperature and most
special uid applications)
1SEL90 - Overcenter Valve
Counterbalance, pilot assisted relief with check
90 L/min (23 USgpm) • 380 bar (5510 psi)
5 High Pressure
Setting Bar
(10 bar increments).
150 to 650 bar (2175 to
3335 psi)
6 Counterbalance
Setting Bar
(10 bar increments).
20 to 170 bar (100 to 250 psi)
3 Pressure Range
@ 4.8 L/min
Note: Code based on pressure
in bar.
20 - 170-350 bar
Std setting 220 bar
(160/60)
35 - 210-380 bar
Std setting 250 bar
(220/60)
Std setting made at 4.8 L/min
Dimensions
mm (inch)
Note: Tightening torque of "F"
adjuster locknut - 20 to 25 Nm
Cavity
Model A20092-T2A
Form Drill TD-2A
Form Reamer TR-2A
Cartridge Only
Basic Code
1SEL90
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)
– –
84.0
(3.31)
max
Screw in to
increase pressure
Screw out to
release load
77.6
(3.00)
34.0
(1.34)
34.9
(1.37)
Ø37.0 (1.46)
max
Ø31.5
(1.24)
1
2
3
5.0 A/F
17.0 A/F
31.75 A/F
1”-14-UNS
thread
L.S.
