EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-450.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
The 1SER series overcenter
valve performs all duties of
a regular overcenter but is
able to relieve and stay open
irrespective of downstream
pressure. This enables the
valve to operate when
used with a closed center
directional valve which has
service line reliefs. The
poppet is pressure balanced,
preventing relief setting
increase due to back pressure.
Ratings and Specifications
Figures based on: Oil Temp = 40˚C Viscosity = 32 cSt (150 SUS)
Rated flow 140 L/min (37 USgpm)
Max relief setting 420 bar (6090 psi)
Max Load Induced pressure: 340 bar (4930 psi
Cartridge material Working parts hardened and ground steel.
External steel surfaces zinc plated.
Mounting position Unrestricted
Cavity number A20094-T17A
Torque cartridge into cavity 150 Nm (110 lbs ft)
Weight 1.2 kg (2.5 lbs)
Seal kit number SK1116 (Nitrile) SK1116V (Viton
®
)
Recommended filtration level BS5540/4 Class 18/13 (25 micron nominal)
Operation temperature -30°C 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
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 load varies and machine
structure can induce instability.
6:1 Best suited for applications
where the load remains
relatively constant.
Other options available upon
request.
1SER140 - Overcenter Valve
Part balanced pilot assisted relief with check
140 L/min (37 USgpm) • 340 bar (4930 psi)
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
725
580
435
290
145
0
50
40
30
20
10
0
0 40 80 120 160 200
0 10 20 30 40 50
Pilot open
Free ow
Pilot (3)
Valve (2)
Cyl (1)
3
1
2
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-451.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
Model Code
1SER*** F 40 S 4
1 2 3 4 5
1 Function
1SER140
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 - 140-250 bar.
Std setting 190 bar
30 - 220-330 bar.
Std setting 270 bar
40 - 310-420 bar.
Std setting 370 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)
Dimensions
mm (inch)
1SER140 - Overcenter Valve
Part balanced pilot assisted relief with check
140 L/min (37 USgpm) • 340 bar (4930 psi)
5 Pilot Ratio
4 - 4:1
6 - 6:1
Other ratios available upon request
Note: Tightening torque of "F"
adjuster locknut - 20 to 25 Nm
Cavity
Model A20094-T17A
Form Drill TD-17A
Form Reamer TR17A
Cartridge Only
Basic Code
1SER140
5.00 A/F
Ø53.00 (2.08)
A/C
Screw in to
increase pressure
Screw out to
release load
17.00 A/F
46.00 A/F
M36 x 2.0
Thread
(P) 3
(V) 2
(C) 1
Ø44.10
(1.74)
25.00
(0.98)
57.00
(2.24)
112.50
(4.43)
125.00
(4.92)
max
46.00
(1.81)
L.S.
1SE#140-F
To t sun
cavity T-17A
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
– –
