EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 E-280.A
An Eaton Brand
E
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1GR30 - Relief Valve
Spool, direct acting
30 L/min (8 USgpm) • 160 bar (2300 psi)
Description
This is a direct acting spool
type screw in cartridge relief
valve. Ideal for low pressure
applications, giving good
control 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
setting, allowing relief flow to
tank through a ring of radial
holes.
Features
Stable, quiet operation.
Cartridge construction
gives maximum flexibility
in mounting. Offering good
repeatability and reseat.
Pressure Drop Curves
Performance Data
Sectional View
Ratings and Specifications
Figures based on: Oil Temp = 40°C Viscosity = 32 cStt (150 SUS)
Rated flow 30 L/min (8 USgpm)
Max setting 160 bar (2300 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 A881 (See Section M)
Torque cartridge into cavity 60 Nm (44 lbs ft)
Weight 1GR30 0.31 kg (0.7 lbs)
1GR35 0.54 kg (1.2 lbs)
1GR36 0.91 kg (2.0 lbs)
Seal kit SK190 (Nitrile)
SK190V (Viton
®
)
Recommended filtration level BS5540/4 Class 18/13 (25 micron nominal)
Operating temp -30° to +90°C (-22° to +194°F )
Leakage 15 milliliters/min nominal
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
200
175
150
125
100
75
50
25
0
1GR30
2900.0
2537.5
2175.0
1812.5
1450.0
1087.5
725.0
362.5
0
0 2.6 5.2 7.8 10.4 13
0 10 20 30 40 50
Tank (2)
Pressure (1)
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 E-281.A
An Eaton Brand
E
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
Dimensions
mm (inch)
1GR30 - Relief Valve
Spool, direct acting
30 L/min (8 USgpm) • 160 bar (2300 psi)
3 Port Sizes
Code Port Size Housing Number - Body Only
Aluminium Aluminium Steel
1GR35 1GR36 1GR36
3W 3/8" BSP C1084
4W 1/2" BSP B4851 C1044 C593
6W 3/4" BSP B3954 C1086 C4917
6T 3/8" SAE B10784
8T 1/2" SAE C7140
12T 3/4" SAE B10506 B10742
1 Basic Code
1GR30 - Cartridge Only
1GR35 - Cartridge and Body
1GR36 - 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 16 S
1 2 3 4 5
4 Pressure Range
Note: Code based on pressure
in bar.
7 - 7-70 bar.
Std setting 35 bar
16 - 14-160 bar.
Std setting 155 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 fluid applications)
Cartridge Only
Basic Code
1GR30
Complete Valve
3/8", 1/2", 3/4" Ports
Basic Code
1GR36
Complete Valve
1/2", 3/4" Ports
Basic Code
1GR35
17.0 A/F
54.0
(2.13)
max
Hex socket adjust
4.0A/F
Tank (2)
Pressure (1)
56.7
(2.23)
1-14 UNS-2A
28.5 A/F
28.5
(1.12)
44.5
(1.75)
15.9
(0.63)
130.0
(5.12)
max
31.8
(1.25)
76.2
(3.00)
38.1
(1.50)
1
2
146.0
(5.75)
max
2 holes
Ø8.7 (0.34) thro’
25.4 (1.00)
1
1
2
38.1
(1.50)
6.3
(0.25)
50.8 (2.00)
12.7
(0.50)
35.0
(1.38)
71.4
(2.81)
92.0
(3.62)
31.8
(1.50)
50.8
(2.00)
– –
