EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-340.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1CPBD300 - Overcenter Valve
Zero differential with check
300 L/min (80 USgpm) • 400 bar (5800 psi)
Ratings and Specifications
Figures based on: Oil Temp = 40˚C Viscosity = 32 cSt (150 SUS)
Rated flow 300 L/min (80 USgpm)
Max working pressure 400 bar (5800 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 SK971 (Nitrile)
SK971V (Viton
®
)
SK971P (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 nominal (60 dpm)
Nominal viscosity range 5 to 500 cSt
Bar per turn 5 bar
Viton is a registered trademark of E.I. DuPont
Description
Zero differential overcenter
valves give static and dynamic
control of loads by supplying
a restriction to flow related
to the opening of the valve
created by the pilot pressure.
The valve is used in
conjunction with a remote
pilot source to provide hose
failure protection, load control
and load holding functions.
If over-pressure or shock
pressure protection is required
then a separate relief valve
should be used.
The drain line allows the
valve to be used in corrosive
atmospheres preventing
the ingress of atmospheric
contaminant.
Operation
The check section allows free
flow into the actuator then
holds and locks the load against
movement. By the application
of pilot pressure to the pilot port
the poppet moves back against
the main spring opening the
cylinder port to the valve port.
The metering characteristic of
the valve is controlled by the rate
Performance Data
Sectional View
Pressure Drop
of the spring, the seat angle and
the pilot pressure applied.
Due to the balanced poppet
design load induced pressure
will not open the valve and once
open valve port pressure will
not increase the pilot pressure
required to keep the valve open.
Features
The cartridge fits a simple cavity
allowing quick, easy field service
reducing down time. Hardened
poppet and seat provide for long
leak free performance..
Pilot (3)
Valve (2)
Cyl (1)
Drain (4)
4
1
3
2
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
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-341.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1CPBD300 - Overcenter Valve
Zero differential with check
300 L/min (80 USgpm) • 400 bar (5800 psi)
1 Function
1CEBD300 - Cartridge only
Model Code
1CPBD300 F 2 P
1 2 3 4
2 Adjustment
F - Screw adjustment
3 Pilot Adjust Range
Note: Code based on pressure
in bar.
2 - 5-20 bar. Std setting 10 bar
Std setting made at 4.8 L/min
4 Seal Material
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)
Dimensions
mm (inch)
Cartridge Only
Basic Code
1CPBD300
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)
