Lukas P 640 TG - Manual (Page 12)

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5.4 Pumps
Depending on the type, a single-flow, double-flow or triple-flow pump is built into LUKAS
hydraulic units.
Single-flow pump 1 pump capacity
Double-flow pump 2 pump capacities
Triple-flow pump 3 pump capacities
The pumps used are always equipped with two pressure levels for each pump capacity, one
low-pressure and one high-pressure level.
Low-pressure level (ND) = up to 16 MPa*
High-pressure level (HD) = up to 70 MPa*
The changeover from low pressure to high pressure is carried out automatically in the pump.
The maximum pressure is limited by a pressure limiting valve.
WARNING / DANGER / CAUTION!
For reasons of safety, the pressure set on this valve must not be adjusted
(without direct authorisation from LUKAS)!
5.3.3 Control valve "automatic operation (ISV valve)"
This valve enables the connection of two pressure hoses and two return hoses. The
patented LUKAS ISV valve provides one device at each connecting block with pressure
without a manual switching procedure. Changeover between the two pressure hoses is
automatic. With this control valve, the first driven and pressure-operated connected device
is always provided with hydraulic fluid. The second connected device, on the other hand, is
automatically disconnected from fluid supply.
5.3.4 Control valve "simultaneous operation"
This valve enables the connection of two pressure hoses and two return hoses. It has two
switching options, each of which controls the pressure application of the pressure hose
that is marked accordingly. This means two devices can be supplied with pressure
simultaneously and independently of one another. Without impairing the work output, it
enables work with two devices simultaneously and independently of one another.
5.3.5 Control valve "triple-flow operation"
This valve enables the connection of three pressure hoses and three return hoses. It has
three switching options, each of which controls the pressure application of the pressure hose
that is marked accordingly. This means three devices can be supplied with pressure
simultaneously and independently of one another. Without impairing the work output, it
enables work with three devices simultaneously and independently of one another.
*) 1 MPa = 10 bar)