SVH
Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: +46 650-367 00, Fax: +46 650-367 27, E-mail: sunfab@sunfab.se Web: www.sunfab.com
2
D
LS
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Drainage line D
Route a drainage pipe of at least 19 mm directly between the pump and
tank. The drainage pipe’s connection to the tank should lie in between the
lowest oil level and the bottom of the tank.
The pump housing must be filled with new hydraulic fluid before the hydrau-
lic pump is commissioned.
Signal line LS
The capacity of the LS signal line should be adapted to the relevant hydraulic
system. The speed and damping for the signal is optimal when the LS signal
line has a capacity of 10 % of the capacity for the pressure line between the
pump and directional control valve. If both lines are the same length, the
inside diameter of the signal line should be 1⁄3 of the pressure line’s internal
diameter I.E.¼–½”. The signal line should ideally be a hose.
Load sensing regulator LSP
Adjust the differential pressure Δp = system pressure minus the signal pres-
sure. The regulation range is 20-55 bar. Preset to 27 bar. 1 turn of the
adjuster screw corresponds to 10 bar. Clockwise increases the differential
pressure, counterclockwise decreases.
Adjust the max. system pressure between 20 and 350 bar. The value preset
at the factory is 350 bar. 1 turn of the adjuster screw corresponds to 50
bar. Clockwise increases the maximum system pressure, counterclockwise
decreases.
Description of the two-part damping
screw on the LSP-controller
With the return flow throttle you can adjust the onstroke
time for bringing the pump from Vgmin to Vgmax.
• Unscrewing the screw reduces the dampening and accelerates the
vonstroke time.
• Screwing in the screw increases the dampening and slows down the
onstroke time.
• Adjustment range: ca. 5.5 revolutions resp. 4 mm
With the bypass throttle you can adjust the destroke time
for bringing the pump from Vgmax to Vgmin.
• Unscrewing the screw increases the dampening and slows down the
destroke time
• Screwing in the screw reduces the dampening and accelerates the
destroke time
• Adjustment range: ca. 4 revolutions resp. 2 mm
System pressure
Damping screw Differential pressure Δp
20 Nm
20 Nm 20 Nm
7015EN2008 Rev 1.4
Sunfab reserves the right to make changes in design and dimensions without notice. Printing and typesetting errors reserved.
Bypass throttle
Return flow throttle
Allen screw
