EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 D-550.A
An Eaton Brand
D
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1SB304 - Brake Release Shuttle Valve
Brake release shuttle directional valve
30 L/min (8 USgpm) • 350 bar (5000 psi)
Description
This valve provides a means
of supplying oil to the outlet
from the inlet when a pre-
set pressure is reached. On
removal of this pressure,
inlet closes opening outlet to
tank. Ideal for use in braking
systems where a pressure is
required in the main system
before the brake is removed.
Operation
When pressure in the inlet
exceeds the set pressure, flow
is allowed from inlet to outlet
closing off the tank line.
When the inlet pressure is
removed, the spool returns to
its normal position, opening the
outlet port to tank and closing
the inlet port.
Features
Cartridge design enabling
speedy servicing when mount-
ed in a body or in a composite
manifold.
Ratings and Specifications
Performance data is typical with fluid at 32 cST (150 SUS)
Max working pressure 350 bar (5000 psi)
Rated flow 30 L/min (8 US gpm)
Pilot pressure 10 to 100 bar (145 to 1450 psi) max pilot pressure 210 bar
Internal leakage 50 ml/min nominal
Temperature range -30° to 90°C (-22° to 194°F)
Cavity A5302 (see Section M)
Torque cartridge into cavity 60 Nm (44 lbs ft)
Mounting position Unrestricted
Filtration BS5540/4 Class 18/13 (25 micron or better)
Nominal viscosity range 5 to 500 cSt
Cartridge material All working parts hardened and ground steel. External surfaces zinc plated.
Standard housing materials Aluminum and Steel
Weight .24 kg (.53 lbs)
Seal kit SK645 (Nitrile) SK645V (Viton
®
)
Viton is a registered trademark of E.I. DuPont
Performance Data
Sectional View
Pressure Drop
3
2
1
4
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
145.0
130.5
116.0
101.5
87.0
72.5
58.0
43.5
29.0
14.5
0
10
9
8
7
6
5
4
3
2
1
0
0 5 10 15 20 25 30
0 1.3 2.6 3.9 5.2 6.5 7.8
2-3
Tank (4)
Outlet (2)
Pilot (1)
Inlet (3)
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 D-551.A
An Eaton Brand
D
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1SB304 - Brake Release Shuttle Valve
Brake release shuttle directional valve
30 L/min (8 USgpm) • 350 bar (5000 psi)
Model Code
1
Function
1SB304 - Cartridge only
2
Adjustment Means
P - Leakproof screw
adjustment
2 3 4 51
1SB*** P 3W S 12
3
Port Size
4
Seals
S - Nitrile
SV - Viton
5
Pressure Range
Note: Code based on pressure in bar.
6 - 10-60 bar.
Std setting 30 bar
12 - 20-100 bar.
Std setting 60 bar
Std setting made at 14 L/min (3.8
USgpm).
Code Port Size Housing Number
Aluminum Steel
0 Cartridge only
3W 3/8" BSP B13602 B13603
6T
3/8" SAE B21661 B21660
56.0
(2.20)
max
Hex socket adjust
5.0 A/F
17.0 A/F
25.4 A/F
7/8-14 UNF-2A
Tank (4)
Pilot (1)
67.0
(2.64)
Inlet (3)
Outlet (2)
35.0
(1.38)
85.7
(3.37)
15.9
(0.63)
31.8
(1.25)
15.9
(0.63)
53.2
(2.09)
17.3
(0.68)
2
1
3
4
31.8 (1.25)
7.1
(0.28)
Typ
142.0
(5.59)
max
22.5
(0.89)
35.0
(1.38)
54.0
(2.13)
4.8
(0.19)
63.5
(2.50)
Dimensions
mm (inch)
Installation DrawingCartridge Only
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