Installation 27/48
RE29583-XL-B/09.20, 4WS2EM 10...XL...,
Bosch Rexroth AG
For flushing the system into which the valve is to be installed, flushing plates with
FKM seals and porting pattern according to ISO 4401-05-05-0-05 are available.
For a dimensional drawing of the flushing plate, refer to the
"Data sheet 29583-XL"
.
Within the flushing plate, ports P, T and T1 as well as X and Y are connected with
each other.
Fig. 2: Flushing plate, representation of the inner connections
Install this flushing plate into the system instead of the valve and subsequently
flush it.
When using the subplates mentioned under chapter 7.6 "Required accessories"
or in case of assembly on comparable cast iron installation surfaces, tighten all
four mounting screws with a tightening torque of 12.5 Nm ± 1.5 Nm (with a friction
coefficient of µ
total
= 0.09...0.14). This tightening torque refers to the maximum
admissible operating pressure.
The use of a directional valve with port in accordance with ISO 4401-05-05-0-05
is suited better than a flushing plate.
This valve can also be used for flushing the actuator ports.
The following is a guideline for the necessary flushing time t in hours:
t
≥
V
- 5
q
v
V
Tank capacity in liters
q
V
Pump flow in liters / minute
The degree of contamination of the hydraulic fluid that can be monitored by
a continuous measurement using a particle counter is decisive for the flushing time.
Install a pressure differential-resistant pressure filter without bypass, if possible
with integrated clogging indicator, directly in front of the valve. During the flushing
procedure, check all filters in short intervals and exchange the contaminated filter
elements, if necessary.
