EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 E-290.A
An Eaton Brand
E
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1GR60 - Relief Valve
Spool, direct acting
60 L/min (16 USgpm) • 40 bar (600 psi)
Description
This is a direct acting spool
type screw in cartridge relief
valve. Ideal for low pressure
applications, giving good con-
trol with fairly constant flow.
Also very quiet in operation
when applied on low flow or
unstable hydraulic systems.
Operation
The valve is held closed by the
spring until pressure on the
piston overcomes the valve set-
ting, allowing relief flow to tank
through a ring of radial holes.
Features
Stable, quiet operation.
Cartridge construction gives
maximum flexibility in mount-
ing. Offering good repeatability
and reseat.
Pressure Drop Curves
Performance DataSectional View
Ratings and Specifications
Figures based on: Oil Temp = 40°C Viscosity = 32 cSt (150 SUS)
Rated flow 60 L/min (16 USgpm)
Max setting 40 bar (600 psi)
Cartridge material Working parts hardened and ground steel.
External surfaces zinc plated.
Body material Standard aluminium (up to 210 bar*).
Add suffix “377" for steel option.
Mounting position Unrestricted
Cavity CVA20-01-0 (See Section M)
Torque cartridge into Cavity 45 Nm (33 lbs ft)
Weight 1GR60 0.18 kg (0.4 lbs)
1GR65 0.36 kg (0.8 lbs)
1GR66 0.48 kg (1.0 lbs)
Seal Kit SK696 (Nitrile)
SK696V (Viton
®
)
Recommended filtration level BS5540/4 Class 18/13 (25 micron nominal
Operating temp -30°C to +90°C (-22° to +194°F)
Leakage 35 milliliters/min @ 210 bar
Nominal viscosity range 5 to 500 cSt
Viton is a registered trademark of E.I. DuPont
1
2
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
870
725
580
435
290
145
0
60
50
40
30
20
10
0
0 2.6 5.2 7.8 10.4 13 15.6
0 10 20 30 40 50 60
Tank (2)
Pressure (1)
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 E-291.A
An Eaton Brand
E
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
Dimensions
mm (inch)
1GR60 - Relief Valve
Spool, direct acting
60 L/min (16 USgpm) • 40 bar (600 psi)
3 Port Sizes
Code Port Size Housing Number - Body Only
Aluminium Steel Aluminium Steel
1GR65 1GR65 1GR66 1GR66
3W 3/8" BSP A13758 A13615
4W 1/2" BSP A8532 B13011 B13473
6T 3/8" SAE A10780
8T 1/2" SAE A10781 A11798 B10783 B13477
1 Function
1GR60 - Cartridge Only
1GR65 - Cartridge and Body
1GR66 - Cartridge and Body
Through Ported
2 Adjustment Means
P - Leakproof Screw
Adjustment
R - Handknob Adjustment
G - Tamperproof Cap
(See page E-7 for dimensions)
Model Code
1GR** P 3W 4
1 2 3 4 5
Cartridge Only
Basic Code
1GR60
Complete Valve
3/8", 1/2" Ports
Basic Code
1GR65
Complete Valve
1/2" Ports
Basic Code
1GR66
4 Pressure Range
Note: Code based on pressure
in bar.
2 - 5-20 bar.
Std setting 20 bar
4 - 5-40 bar.
Std setting 28 bar
Std setting made at 14 L/min
5 Seals
S - Nitrile (For use with most
industrial hydraulic oils)
SV - Viton (For high
temperature and most
special uid applications)
52.0
(2.05)
max
Hex socket adjust
4.0 A/F
17.0 A/F
24.0 A/F
M20 x 1.5-6g
Tank (2)
Pressure (1)
31.0
(1.22)
107.0
(4.21)
max
1 hole Ø9.0 (0.35) thro’
15.5
(0.61)
55.0
(2.17)
15.9
(0.63)
31.8
(1.25)
2
1
45.0
(1.77)
10.0
(0.39)
35.0
(1.38)
50.8
(2.00)
117.0
(4.61)
max
2 mounting
holes Ø9.0
(0.35) thro’
49.0
(1.90)
25.4
(1.00)
31.0
(1.22)
36.5 (1.44)
50.8
(2.00)
50.8
(2.00)
15.5
(0.61)
35.0
1.38)
7.0 (0.28)
65.0
(2.56)
2
1
1
– –
