EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-330.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
24
21
18
15
12
9
6
3
0
352
308
264
220
176
132
88
44
0
Free ow
Pilot open
0 50 100 150 200 250 300 350 400
0 25 50 75 100
1CEBD300 - Overcenter Valve
Fully balanced, pilot assisted relief with check
300 L/min (80 USgpm) • 270 bar (4000 psi)
Ratings and Specifications
Figures based on: Oil Temp = 40°C Viscosity = 32 cSt (150 SUS)
Rated flow 300 L/min (80 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.
Mounting position Unrestricted
Cavity A13098 (See Section M)
Torque cartridge into cavity 150 Nm (110 lbs ft)
Weight cartridge only 0.91 kg (2.00 lbs)
Seal kit SK686 (Nitrile)
SK686V (Viton
®
)
SK686P (Polyurethane Nitrile)
Filtration
BS5540/4 Class 18/13 (25 micron nominal)
Temperature range -30° to +90°C (-22° to +194°F)
Internal leakage 4 milliliters/min (60 dpm)
Nominal viscosity range 5 to 500 cSt
Viton is a registered trademark of E.I. DuPont
Description
Overcenter valves give static
and dynamic control of loads
by supplying a counterbalance
pressure to the actuator. They
prevent runaway in the event
of hose burst and hold the
load with minimal leakage.
The pressure balanced valve is
unaffected by back pressure,
allowing service line reliefs
to operate and for the valve
to be used in regenerative or
proportional valve systems.
The overcenter valve should
be mounted either into, onto
or as close to the actuator as
possible to give maximum
protection.
Single overcenter valves
control unidirectional loads
such as in aerial platforms,
cranes or winches and dual
overcenters are suited to
bi-directional motion such as
wheel motor applications or
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
Performance Data
Sectional View
Pressure Drop
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 Best suited for applications
where load varies and machine
structure can induce instability.
8:1 Best suited for applications
where the load remains
relatively constant.
Pilot (3)
Valve (2)
Cyl (1)
Vent
3
1
2
4
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-331.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1CEBD300 - Overcenter Valve
Fully balanced, pilot assisted relief with check
300 L/min (80 USgpm) • 270 bar (4000 psi)
1 Basic Code
1CEBD300 - Cartridge only
2 Adjustment
F - Screw adjustment
Model Code
1CEBD300 F 35 S 3
1 2 3 4 5
3 Pressure Range
@4.8 L/min
Note: Code based on pressure
in bar.
35 - 70-350 bar.
Std setting 210 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)
P - Polyurethane/Nitrile
(For arduous applications)
5 Pilot Ratio
3 - 3:1 - (Standard)
8 - 8:1
Dimensions
mm (inch)
Cartridge Only
Basic Code
1CEBD300
Note: Tightening torque
of “F” adjuster locknut -
20 to 25 Nm.
63.0
(2.48)
MAX
75.5
(2.97)
Hex Socket Adjust
6.0 A/F
22.0 A/F
46.0 A/F
1-5/8-12 UN-2A
Drain (4)
Valve (2)
Pilot (3)
Cyl (1)
– –
