G-10
G
Where measurements are critical request certied drawings. We reserve the right to change specications without notice.
Eaton Hydraulic Screw-in Cartridge Valves (SiCV) E-VLSC-MC001
-E—January 20
18 www.eaton.com
Operation
The valve remains closed until
the spring bias is reached
at port 1 at which time the
poppet lifts of the seat and
allows ow from port 1 to port
2. in the other direction the
valve is closed.
Features
Cartridge design with
machined seats and precision
ground balls gives excellent
ow reseat characteristics.
Installation into the 2-port 7/8"
UNF cavity gives easy tment
and serviceability
.
Pressure drop curves
Performance data
3CA20 - Check valve
Direct acting, ball type
40 L/min (10 USgpm) • 350 bar (5000 psi)
Sectional view
Description
These cartridge check valves
allow ow at a low pressure
drop, with cracking pressure
from 0.5 to 7 bar (7 to 100 psi)
in the free ow direction and
close to prevent ow in the
reverse direction.
They t into simply machined
cavities and are therefore ideal
for installation into custom
designed Hydraulic Integrated
Circuits, manifold blocks and
other hydraulic equipment.
Outlet
(2)
Inlet (1)
2
1
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
290.0
217.5
145.0
72.5
0
20
15
10
5
0
0 10 20 30 40 50
0 2.6 5.2 7.8 10.4 13
1. 5 bar
Ratings and specifications
Figures based on oil temperature of 40˚ C and viscosity of 32 cSt (150 SUS)
Rated flow 40 L/min (10 USgpm
Maximum pressure 350 bar (5000 psi)
Cracking pressures 0.5 bar
1.5 bar
3.5 bar
7.0 bar
(7 psi)
(22 psi)
(50 psi)
(100 psi)
Cartrid ge material All steel construction.
External parts electroless zinc plated.
Standard housing material Standard aluminum (up to 210 bar).
Add suffix "377" for steel option.
Mountin g position Unrestricted
Cavity number A879 (See Section M)
Torque cartrid ge into cavity 45 Nm (33 lbs. ft.)
Weight 0.05 kg (0.11 lbs.)
Seal kit number SK396 (Nitrile), SK396V (Viton
®
)
Recommended filtration level BS5540/4 Class 18/3 (25 micron nominal)
Operating temperature -30°C to +90°C (-22°C to +194°F)
Leakage 0.2 ml/min nominal
Nominal viscosity range 5 to 500 cSt
Viton is a registered trademark of E. I. DuPont
G-11
G
Where measurements are critical request certied drawings. We reserve the right to change specications without notice.
Eaton Hydraulic Screw-in Cartridge Valves (SiCV) E-VLSC-MC001
-E—January 20
18 www.eaton.com
Model code
3CA20 - Check valve
Direct acting, ball type
40 L/min (10 USgpm) • 350 bar (5000 psi)
3W
Dimensions
mm (inch)
Cartridge only
Basic code
3CA20
Single valve
1/4", 3/8" Ports
Basic code
3CA25
1
Basic code
3CA20 - Cartridge only
3CA25 - Cartridge and body
2
Port size
4
Seals
S - Nitrile (For use with
most industrial
hydraulic oils)
SV - Viton
(for high
temperature and most
special uid
applications)
3
Cracking pressure
0.5 - 0.5 bar (7 psi)
1.5 - 1.5 bar (22 psi)
3.5 - 3.5 bar (50 psi)
7.0 - 7.0 bar (100 psi)
28.0
(1.10)
6.5
(0.26)
max
22.2 A/F
3/4-16 UNF-2A
Inlet (1)
Outlet (2)
16.0
(0.63)
2 holes Ø6.8
(0.27) thro’
31.0
(1.22)
44.0
(1.73)
50.0
(1.97)
1
2
15.9
(0.63)
12.7
(0.50)
28.8
(1.13)
31.8
(1.25)
44.8
(1.76)
50.8 (2.00)
ote:N For applications above
210 please consult our technical
department or use the steel body
option.
3CA** 1.5 S
––
1 2 3 4
Code Port size Housing number - body only
Aluminium Steel
2W 1/4" BSPA1485
3W 3/8" BSPA1043 A14175
6T 3/8" SAE A15676 A14843