EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-200.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
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 surfaces zinc plated.
Mounting position Unrestricted
Cavity A12196 (See section M)
Torque cartridge into cavity 60 Nm (44 lbs ft)
Weight 0.29 kg (0.63 lbs)
Seal kit SK634 (Nitrile)
SK634V (Viton
®
)
SK634P (Polyurethane/Nitrile)
Filtration BS5540/4 Class 18/13 (25 micron nominal)
Temperature range -30° to +90°C (-22° to +194°F)
Leakage 0.3 milliliters/min (5 dpm)
Nominal viscosity range 5 to 500 cSt
Viton is a registered trademark of E.I. DuPont
1CEBD90 - Overcenter Valve
Fully balanced, 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 supplying a counterbalance
pressure to the actuator. They
will stop runaway in the event
of hose burst and hold the
load with minimal leakage.
The pressure balanced
overcenter relief setting is
unaffected by back pressure,
enabling the valve to stay open
when the valve port pressure
rises. This will allow service
line reliefs to work normally
and will also allow the control
of regenerative or proportional
systems. The drain line
allows the valve to be used
in corrosive atmospheres
preventing the ingress of
atmospheric contaminant.
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.
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.
Pilot Ratio
4:1 Best suited for applications
where load varies and machine
structure can induce instability.
Other ratios available upon
request.
Pressure Drop
Performance Data
Sectional View
Pilot (3)
Valve (2)
Cyl (1)
Vent
3
1
2
4
Flow - L/min
Pressure - psi
Pressure - bar
Flow - US gpm
0 25 50 75 100
0 6.5 13 19.5 26
240
210
180
150
120
90
60
30
0
16
14
12
10
8
6
4
2
0
Free ow
Piloted open
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-201.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1 Function
1CEBD90
2 Adjustment Means
F - Screw adjustment
Dimensions
mm (inch)
Model Code
3 Pressure Range
@ 4.8 L/min
Note: Code based on pressure
in bar.
20 - 70-225 bar
Standard setting 100 bar
35 - 200-350 bar
Standard setting 210 bar
Standard setting made at 4.8 L/min
5 Pilot Ratio
4 - 4:1
Other ratios available upon
request
1CEBD90 - Overcenter Valve
Fully balanced, pilot assisted relief with check
90 L/min (23 USgpm) • 270 bar (4000 psi)
1CEBD90 F
**
P
4
4 Seals
S - Nitrile (for use with most
industrial hydraulic oils)
SV - Viton (for high tempera
ture and most special
fluid applications)
P - Polyurethane/Nitrile (for
arduous applications)
Note: Tightening torque of “F”
adjuster locknut - 20 to 25 Nm
Cartridge Only
Basic Code
1CEBD90
1 2 3 4 5
Hex socket adjust
5.0 A/F
62.0
(2.4)
max
54.0
(2.13)
32.0 A/F
M27 x 1.5-6g
Vent
Pilot (3)
Valve (2)
Cyl (1)
– –
Line body available on request.
