EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-120.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1CER30 - Overcenter Valve
Part balanced, pilot assisted relief with check
30 L/min (8 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
2.5:1 Best suited for extremely
unstable applications such
as long booms or flexible
frameworks.
4:1 Best suited for applications
where load varies and machine
structure can induce instability.
Sectional View
Pressure Drop
Pilot (3)
Valve (2)
Cyl (1)
3
1
2
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
750
600
450
300
150
0
50
40
30
20
10
0
0 10 20 30 40 50
0 2.5 5 7.5 10 12.5
Free ow
Pilot open
Ratings and Specifications
Figures based on: Oil Temp = 40° C Viscosity = 32 cSt (150 SUS)
Rated flow 30 L/min (8 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 material Aluminum (up to 210 bar). Add suffix “377” for steel option.
Mounting position Unrestricted
Cavity A6610 (See Section M)
Torque cartridge into cavity 45 Nm (33 lbs ft)
Weight 1CER30 0.15 kg (0.33 lbs)
1CER35 0.41 kg (0.90 lbs)
1CEER34 0.90 kg (1.98 lbs)
Seal kits SK395 (Nitrile)
SK395V (Viton
®
)
Filtration Cleanliness code 18/13 (25 micron nominal)
Temperature range -30°C to +90°C (-22° to +194°F)
Internal 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
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-121.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1CER30 - Overcenter Valve
Part balanced, pilot assisted relief with check
30 L/min (8 USgpm) • 270 bar (4000 psi)
Model Code
1
Basic Code
1CER30 - Cartridge only
1CER35 - Cartridge and body
1CEER34 - Cartridges and dual
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 51
1CE**** F 3W 35 S
3
Port Sizes - Bodied Valves Only
4
Pressure Range
@ 4.8 L/min
Note: Code based on pressure
in bar.
35 - 100-350 bar.
Std setting 210 bar
Std setting made at 4.8 L/min
5
Seals
S - Nitrile
SV - Viton
6
Pilot Ratio
2 - 2.5:1
4 - 4:1
6
4
Code Port Size Housing Number
Aluminum Steel Aluminum Steel
Body Only Single Single Dual Dual
3W 3/8" BSP Valve & Cyl Port 1/4" BSP Pilot Port B6743 B12823 B6836 B13803
6T 3/8" SAE Valve & Cyl Port 1/4” SAE Pilot Port B10536 B10805
8T 1/2" SAE Valve & Cyl Port 1/4” SAE Pilot Port B7884 B11811 B30237 B11812
Cartridge Only
Basic Code
1CER30
Dimensions
mm (inch)
Single Valve
3/8". 1/2" Ports
Basic Code 1CER35
Dual Valve
3/8". 1/2" Ports
Basic Code 1CEER34
(Internally Cross Piloted)
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
Hex socket adjust
4.0 A/F
17.0 A/F
25.4 A/F
M20 x 1.5-6g
Pilot (3)
Valve (2)
Cyl (1)
47.0
(1.85)
max
42.5
(1.67)
28.0
(1.10)
max
for
xed
‘N’
adjust
26.5
(1.04)
60.0
(2.36)
16.0
(0.63)
31.8
(1.25)
9.0
(0.35)
42.0
(1.65)
32.0
(1.26)
63.5
(2.50)
9.0
(0.35)
11.5
(0.45)
88.0
(3.46)
for
xed
‘N’ adjust
107.0
(4.21)
max
3
2
1
2 holes Ø9.0 (0.35) thro’
– –
70.0 (2.75)
31.7
(1.25)
26.5
(1.04)
63.5
(2.50)
16.0
0.63)
31.8
(1.25)
57.0
(2.24)
9.8
(0.39)
82.0 (3.22)
101.6 (4.0)
2 holes Ø9.0 (0.35) thro’
111.0
(4.37)
max
V1
V2
C1
C2
C1
V1
C2
V2
