EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 D-870.A
An Eaton Brand
D
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1HSH701 - Hot Oil Shuttle Valve
Hot oil shuttle, directional valve
80 L/min (21 USgpm) • 420 bar (6000 psi)
Description
This valve provides hot oil
exhaust in a closed loop
hydrostatic system. The high
pressure line causes the valve
to open the low pressure line
to tank through a back pressure
relief valve, thus purging the
system of extra oil supplied by
the charge pump.
Operation
The two inlets are fed by the
pressure lines of a closed loop
hydraulic system. As soon as
pressure rises in either line, the
spool which is internally piloted
opens the lower pressure side
to tank through a relief valve.
This allows the charge pump
ow to be exhausted to tank
after the oil has done its work,
hence the title ‘hot oil shuttle’.
If the system is reversed, the
spool switches in the opposite
direction, maintaining hot oil
exhaust.
Features
Compact design with high
pressure rating and low pres-
sure drop characteristics.
Hardened and match ground
working parts keep cross port
leakage to a minimum.
Ratings and Specifications
Performance data is typical with fluid at 32 cST (150 SUS)
Max working pressure 420 bar (6000 psi)
Rated flow 80 L/min (21 US gpm)
Internal leakage 90 ml/min nominal per land
Temperature range -30° to 90°C (-22° to 194°F)
Cavity A21145 (see Section M)
Torque cartridge into cavity 67 Nm (50 lbs ft)
Mounting position Line mounted
Filtration BS5540/4 Class 18/13 (25 micron or better)
Nominal viscosity range 5 to 500 cSt
Standard housing materials Aluminum or Steel
Weight 1HSH701 .37 kg (.8 lbs), 1HSH751 1.60 kg (3.5 lbs)
Seal kit SK1211 (Nitrile) SK1211V (Viton
®
)
Viton is a registered trademark of E.I. DuPont
Performance Data
Sectional View
Pressure Drop
2
3
4
Flow - US gpm
Flow - L/min
Pressure - psi
Pressure - bar
290
232
174
116
58
0
2 - 3
4 - 3
20
16
12
8
4
0
0 10 20 30 40 50 60 70 80
0 2.5 5 7.5 10 12.5 15 17.5 20
Inlet (4)
Inlet (2)
Outlet (3)
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 D-871.A
An Eaton Brand
D
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1HSH701 - Hot Oil Shuttle Valve
Hot oil shuttle, directional valve
80 L/min (21 USgpm) • 420 bar (6000 psi)
Model Code
1
Function
1HSH701 - Cartridge only
1HSH751 - Cartridge and body
2 3 4 51
1HSH** 6W 1.0 S 377
2
Port Size
3
Pilot Pressure
0.4 - 4 bar
1.0 - 10 bar
4
Seals
S - Nitrile
SV - Viton
®
5
Body Material
377 - Steel
Omit for aluminum up to 210 bar
(3000 psi)
Code Port Size Housing Number
Aluminum Steel
Omit Cartridge only
6W 3/4" BSP B21667
12T 3/4" SAE B21668 B21669
27.0
(1.06)
max
90.7
(3.57)
32.0 A/F
1-1/16-12UN-2A
Inlet (4)
Outlet (3)
Inlet (2)
53.50
(2.11)
25.00
(0.98)
50.80
(2.00)
25.00
(0.98)
29.00
(1.14)
78.0
(3.07)
91.90
(3.62)
4.80
(0.19)
8.50
(0.33)
Typ
154
(6.06)
max
4
3
2
111.30
(4.38)
127.0
(5.0)
Dimensions
mm (inch)
Installation Drawing (Steel)Cartridge Only
–– –
Note: For applications above
210 bar (3000 psi), please con-
sult our technical department
or use the steel body option.
