EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 D-856.A
An Eaton Brand
D
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1HSH20 - Hot Oil Shuttle Valve
Hot oil shuttle, directional valve
20 L/min (5 USgpm) • 350 bar (5000 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
flow 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 350 bar (5000 psi)
Rated flow 20 L/min (5 US gpm)
Internal leakage 90 ml/min nominal per land
Temperature range -30° to 90°C (-22° to 194°F)
Cavity CVB-22-06-0 (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 1HSH20 0.14 kg (.3 lbs), 1HSH251 1.0 kg (2.2 lbs)
Seal kit SK632 (Nitrile) SK632V (Viton
®
)
Viton is a registered trademark of E.I. DuPont
Performance Data
Sectional View
Pressure Drop
1
2
3
Flow - L/min
145
116
87
58
29
0
10
8
6
4
2
0
0 1.3 2.6 3.9 5.2
0 5 10 15 20
Flow - US gpm
Pressure - bar
Pressurep - psi
3-2
1-2
Inlet (3)
Outlet (2)
Inlet (1)
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 D-857.A
An Eaton Brand
D
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1HSH20 - Hot Oil Shuttle Valve
Hot oil shuttle, directional valve
20 L/min (5.3 USgpm) • 350 bar (5000 psi)
Model Code
1
Function
1HSH20 - Cartridge only
1HSH25 - Cartridge and body
2 3 4 51
1HSH** 3W 0.3 S 377
2
Port Size
3
Pilot Pressure
0.3 - 3 bar
0.6 - 6 bar
4
Seals
S - Nitrile (for use with most
industrial hydraulic oils)
SV - Viton
®
(for high tempera-
ture and most special fluid
applications)
5
Body Material
377 - Steel
Omit for aluminum up to 210 bar
(3000 psi)
Code Port Size
Aluminum Steel
3W 3/8" BSP B13519 B13520
4W 1/2" BSP B13321 B13522
6T 3/8" SAE B10800
8T 1/2" SAE B10801 B13526
Inlet (3)
Outlet (2)
Inlet (1)
25.4 A/F
M22 x 1.5-6g
54.0
(2.13)
13.5
(0.53)
78.0
(3.07
38.0
(1.50)
18.5
(0.73)
10.0
(0.39)
10.0
(0.39)
38.0 (1.50)
58.0
(2.28)
76.2 (3.00)
15.9
(0.63)
31.8
(1.25)
2 holes
Ø9.0
(0.35) thro’
2
3
1
Dimensions
mm (inch)
Installation DrawingCartridge Only
–– –
Note: For applications above
210 bar (3000 psi), please con-
sult our technical department
or use the steel body option.
