5.2 Hydraulic connection
DAMAGE
Prerequisites for assembling hydraulic connections
►
The dimensions of all access and connecting lines must correspond to the specifications of the
system. Pipes, hose lines, ttings and connectors must be designed for the maximum pressure of
the system.
►
Pipes, hose lines, ttings and connectors that have an insufficient inner diameter or that are too
long will lead to pressure losses. This impairs the performance of the hydraulic system.
►
Keep lines as short as possible and avoid kinks. Do not go below the smallest bend radius specied
by the manufacturer.
►
Keep the number of employed ttings to a minimum to avoid potential leakage spots.
►
All hydraulic lines are to be mounted tension-free to prevent noise generation and damage due to
resonances.
►
No contamination from the cylinders, screw ttings, connectors and hose lines may enter the
hydraulic system. Flush before use.
For detailed hydraulic data, see the type plate.
Hydraulic data
Pressure
Pressure side (port P): depends on version and delivery ow.
Suction side (vessel interior): ambient air pressure. Not suitable for charging.
p
min
= 30 bar (due to dynamic pressure)
Start against pressure
The version with 3-phase motor can start against the pressure p
Max
.
The AC motor version can only act counter to a minor pressure.
Hydraulic uid
Hydraulic uid: according to DIN 51 524 Part 1 to 3; ISO VG 10 to 68 according to DIN ISO 3448
Viscosity range: min. approx. 4; max. approx. 800 mm
2
/s
Optimal operating range: approx. 10 to 500 mm
2
/s
Also suitable for biologically degradable hydraulic uids type HEPG (polyalkylene glycol) and HEES (synthetic
ester) at operating temperatures up to approx. 70°C.
Cleanliness class
ISO 4406
21/18/15...19/17/13
Temperature
Environment: approx. -40 to +80°C, oil: -25 to +80°C, pay attention to the viscosity range.
Start temperature: down to -40°C is permissible (observe start viscosities!), as long as the steady-state
temperature is at least 20K higher during subsequent operation.
Biologically degradable hydraulic uids: note manufacturer specifications. With consideration for the seal
compatibility, not above +70°C.
26/61
B 8010 - 04-2021 - 1.0
HAWE Hydraulik SE
