3
About this product
3.1 Structure
The hydraulic power pack consists of a fully enclosed metal housing containing a tank, a brushless
electric drive, and a gear pump.
The bell housing contains the following:
■
hydraulically actuated shuttle valve
■
two congurable pressure-limiting valves for safeguarding the system pressure
■
two check valves for stop function that can be activated hydraulically
■
two overpressure valves for safeguarding maximum pressure in the event of heating
■
emergency manual valve
3.2 Functions
Further information
.
Motor
Check valve 1
Check valve 2
Pressure at connection A
ON
(anti-clockwise
rotation direction)
OPEN
OPEN
Consumer hydraulically held in
place
OFF
CLOSED
CLOSED
Pressure at connection B
ON
(clockwise
rotation direction)
OPEN
OPEN
Pressure at connection A
Energize the electric drive so there is pressure at connecting line A. The motor and pump deliver a ow
rate. The ow rate ows via the open check valves to consumer port A.
Stop function
The electric drive is not energized. The closed check valves ensure the consumer remains hydraulically
held in place.
Pressure at connection B
Energize the electric drive so there is pressure at connecting line B. The pump and motor deliver a ow
rate. The ow rate ows via the open check valves to consumer port B.
Manual override
The system can be switched to a pressureless state using the emergency manual valve.
CAUTION
Injuries due to cylinders dropping down in the event of a strong pressure drop
In the event of a strong pressure drop, connected cylinders may drop down very quickly, causing damage
or injuries.
►
Secure connected cylinders before opening the emergency manual valve.
Opening the emergency manual valve:
1. Unscrew the screw attached to the side of the connection block anti-clockwise by 3 to a maximum of
5 revolutions.
✓
Port A is connected to the tank.
✓
A line to Port B is opened if turned by a further revolution.
10/27
B 8543 - 10-2021 - 1.0
HAWE Hydraulik SE
