EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-480.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1CEESH95 - Dual Overcenter Valve
Pilot assisted relief with brake shuffle
90 L/min (23 USgpm) • 270 bar (4000 psi)
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) (35), 225 bar (3260 psi) (20)
Max load induced pressure 270 bar (4000 psi), 160 bar (2300 psi)
Cartridge material Working parts hardened and ground steel.
External surfaces electroless nickel plated.
Standard housing material Steel
Mounting position Line Mounted
Weight 2.20 kg (4.84 lbs)
Seal kit SK817 (Nitrile)
SK817V (Viton
®
)
Filtration
BS5540/4 Class 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
Description
Overcenter Valves give
static and dynamic control
of loads by regulating the
flow into and out of hydraulic
actuators. When installed
close to or within an actuator,
the overcenter valve will
stop runaway in the event
of hose burst and if open
center directional control
valves are used, will allow
thermal expansion relief of the
hydraulic fluid.
These dual overcenter valves
also contain a brake release
shuttle valve which ensures
that pressure is applied to a
brake release circuit regardless
of whether pressure is
applied to ports V1 or V2.
These multifunction valves
are normally used for the
static and dynamic control of
systems using motors or
semi-rotary actuators.
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
Performance Data
Pressure Drop
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
These valves have the
excellent load control and
safety features of the dual
overcenter valve with the
addition of a port for a brake
release line. Smooth, safe
performance.
Pilot Ratio
4:1 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.
Other ratios are available upon
request.
4:1 version 8:1 version
C1
V1
C2
V2
B
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
Flow - L/min
Pressure - psi
Pressure - bar
Flow - US gpm
0 25 50 75 100
0 6.5 13 19.5 26
600
500
400
300
200
100
0
42
35
28
21
14
7
0
Free ow
Piloted open
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 F-481.A
An Eaton Brand
F
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1CEESH95 - Dual Overcenter Valve
Pilot assisted relief with brake shuffle
90 L/min (23 USgpm) • 270 bar (4000 psi)
Dimensions
mm (inch)
1 Function
1CEESH95 - Cartridge and
Body
2 Adjustment Means
F - Screw adjustment
N - State pressure setting required
For fixed versions add setting in 10
bar increments to end of part number.
Subject to a ±10% tolerance.
Model Code
4 Pressure Range
4.8 L/min
Note: Code based on pressure
in bar.
20 - 70-225 bar.
Std setting 100 bar
35 - 200-350 bar.
Std setting 210 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 uid applications
6 Pilot Ratio
4 - 4:1
8 - 8:1
7 Body Material
377 - Steel
3 Port Size
1CEESH95 F 6W 35 S 4 377
1 2 3 4 5 6 7
Complete Valve
3/4" Ports
Basic Code
1CEESH95
Code Port Size Housing Number - Body Only
Steel
6W 3/4" BSP Valve & Cyl Port 1/4" BSP Brake Port BXP17429-6W-S-377
Note: Tightening torque
of “F” adjuster locknut -
20 to 25 Nm
76.20
(2.86)
36.50
(1.44)
25.40
(1.00)
50.80 (2.00)
10.00
(0.39)
61.50
(2.42)
120.00 (4.72)
140.00 (5.51)
71.00 (2.80)
36.50
(1.44)
36.50
(1.44)
25.40
(1.00)
95.00 (3.74)
46.00
(1.81)
25.40
(1.00)
2 off
Ø11.00 (0.43)
mtg holes
V1
B
V2
CT3
C1 C2
– –
