EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-250.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 180 L/min (47 USgpm)
Max relief setting 400 bar (5800 psi)
Max load induced pressure 270 bar (4000 psi)
Cartridge material Working parts hardened and ground steel.
External surfaces electroless nickel plated.
Mounting position Unrestricted
Cavity number A6726 (See Section M)
Torque cartridge into cavity 100 Nm (74 lbs ft)
Weight 0.59 kg (1.30 lbs)
Seal kit number SK830 (Nitrile)
SK830V (Viton
®
)
SK830P (Polyurethane/Nitrile)
Recommended filtration level BS5540/4 Class 18/13
(25 micron nominal)
Operating temperature
-30°C to +90°C
(-22° to +194°F)
Leakage 0.3 milliliters/min max (5 dpm)
Nominal viscosity range 5 to 500 cSt
Bar per turn 65 bar
Viton is a registered trademark of E.I. DuPont
1CEBD120 - Overcenter Valve
Fully balanced, pilot assisted relief with check
180 L/min (47 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
3:1 (standard) Best suited for
applications where load varies
and machine structure can
induce instability.
8:1 & 12:1 Best suited for
applications where the load
remains relatively constant.
22:1 Specifically designed for
Boom Loc applications.
Performance Data
Sectional View
Pressure Drop
Pilot (3)
Valve (2)
Cyl (1)
Drain (4)
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
580
435
290
145
0
40
30
20
10
0
Free flow
Pilot open
0 30 90 150 210 270
0 8 24 40 56 72
3
1
2
4
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-251.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
4.00 A/F
17.00 A/F
38.1 A/F
Drain (4)
1-15/16-12UN-2A
Pilot (3)
Valve (2)
Cyl (1)
63.0
(2.48)
max
59.5
(2.34)
Dimensions
mm (inch)
1CEBD120 - Overcenter Valve
Fully balanced, pilot assisted relief with check
180 L/min (47 USgpm) • 270 bar (4000 psi)
Model Code
1 Function
1CEBD120 - Cartridge only
2
Adjustment Means
F - Screw adjustment
Cartridge Only
Basic Code
1CEBD120
1CEBD120 F 35 P 8
1 2 3 4 5
3
Pressure Range
@ 4.8 l/min
Note: Code based on pressure
in bar.
35 - (3:1, 8:1 and 22:1):
70-350 bar
Std setting 350 bar
40 - (12:1): 70-400 bar.
Std setting 350 bar
Std setting made at
4.8 L/min
5 Seals
S - Nitrile (For use with
most industrial
hydraulic oils)
SV - Viton (For high
temperature and most
special fluid applications)
P - Polyurethane/Nitrile
(For arduous applications)
6 Pilot Ratio
3 - 3:1
8 - 8:1
12 - 12:1
22 - 22:1
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
– –
