EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-180.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1CER90 - Overcenter Valve
Part balanced, pilot assisted relief with check
90 L/min (23 USgpm) • 270 bar (4000 psi)
Description
The 1CER 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.
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
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.
Other ratios available upon
request.
Ratings and Specifications
Figures based on: Oil Temp = 40˚C Viscosity = 32 cSt (150 SUS)
Rated flow 90 L/min (23 USgpm)
Max relief pressure 350 bar (5000 psi)
Max load induced pressure 270 bar (4000 psi)
Cartridge material Working parts hardened and ground steel.
External surfaces zinc plated.
Standard housing materials Aluminum up to 210 bar. Add suffix “377” for steel option.
Cavity A12336 (see Section M)
Mounting position Unrestricted
Torque cartridge into cavity 60 Nm (44 lbs ft)
Weight 1CER90 0.29 kg (0.63 lbs)
1CER95 1.35 kg (2.97 lbs)
1CEER95 2.10 kg (4.62 lbs)
Seal kit SK633 (Nitrile)
SK633V (Viton
®
)
Filtration BS5540/4 Class 18/13 (25 micron nominal)
Temperature range -30° to +90°C (-22° to +194°F)
Internal leakage 0.3 ml/min (5 dpm)
Nominal viscosity range 5 to 500 cSt
Viton is a registered trademark of E.I. DuPont
Performance Data
Sectional View
Pressure Drop
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
Free ow
Piloted open
0 6.5 13 19.5 26
0 25 50 75 100
Pilot (3)
Valve (2)
Cyl (1)
3
1
2
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-181.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1CER90 - Overcenter Valve
Part balanced, pilot assisted relief with check
90 L/min (23 USgpm) • 270 bar (4000 psi)
Model Code
1
Function
1CER90 - Cartridge only
1CER95 - Cartridge and body
1CEER95 - Cartridges
and body
2
Adjustment
F - Screw adjustment
N - Fixed - State pressure
setting required.
For fixed versions add setting in 10
bar increments to end of part number.
Subject to a +/-10% tolerance.
2
3
4 5
1
1CE**** F 4W 35 S
3
Port Size
Dimensions
mm (inch)
6
4
Single Valve
1/2" Ports
Basic Code
1CER95
Cartridge Only
Basic Code
1CER90
Dual Valve
1/2" Ports
Basic Code 1CEER95
Internally Cross Piloted
Code Port Size Housing Number - Body Only
Aluminum Steel Aluminum Steel
Single Single Dual Dual
4W 1/2" BSP Valve & Cyl Port 1/4" BSP Pilot Port B13625 B13626 C13627 C13628
8T 1/2" SAE Valve & Cyl Port 1/4” SAE Pilot Port B10806 B10922 C10807 C11561
4
Pressure Range
@ 4.8 L/min
Note: Code based on pressure
in bar.
20 - 70-225 bar.
Std setting 100 bar
35 - 200-350 bar.
Std setting 210 bar
Std setting made at 4.8 L/min
5
Seal Material
S - Nitrile (For use with most
industrial hydraulic oils)
SV - Viton (For high
temperature and most
special fluid applications)
6
Pilot Ratio
4 - 4:1 Other ratios available
upon request
Note: Tightening torque
of “F” adjuster locknut -
20 to 25 Nm.
Note: For applications above
210 bar - please consult our
technical department or use
the steel body option.
62.0
(2.44)
max
54.0
(2.13)
Hex socket adjust
5.0 A/F
17.0 A/F
32.0 A/F
M27 x 1.5-6g
Pilot (3)
Valve (2)
Cyl (1)
76.2
(3.0)
36.0
(1.42)
19.0
(0.75)
38.1
(1.50)
58.0
(2.28)
40.5
(1.59)
86.5 (3.41)
139.0
(5.47)
max
107.0 (4.21)
127.0 (5.0)
2 holes Ø11.0 (0.43) thro’
V1
V2
C1
C2
10.0
(0.39)
36.0
(1.42)
70.0
(2.76)
19.0
(0.75)
38.1
(1.50)
10.0
(0.39)
38.1
(1.50)
58.0
(2.28)
56.0 (2.20)
76.2 (3.0)
18.0
(0.71)
132.0
(5.2)
max
38.1
(1.50)
2 holes
Ø11.0 (0.43)
thro’
2
3
1
– –
C1
V1
C2
V2
