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2 Hydraulic Fluid
Mineral oil based hydraulic fluid according to DIN 51524,
parts 1 to 3, (ISO 11158).
Other hydraulic fluids on request.
Viscosity: 5...400 mm²/s, recommended 15...100 mm²/s.
Temperature
range:
T
–20...80 °C.
F
Class of cleanliness: According to ISO 4406:1999 at least
class 18/15/12; for longer life, class 17/14/11 recommended.
The cleanliness of the hydraulic fluid greatly influences the
functional safety and the wear and tear. In order to avoid mal-
functions and increased wear and tear, we recommend filtrat-
ing the hydraulic fluid accordingly.
Flushing instruction: Use of flushing plates or flushing valves
according to the machine manufacturer's instructions.
3 Installation
Compare model number and type with that specified on hy-
draulic schematic. The valve can be mounted in any position,
fixed or movable. The venting screw has to point upwards.
Mounting surface: Check for flatness (< 0.01 mm over
100 mm) and finish (R
< 0.8 µm). Care must be taken to en-
a
sure that contamination does not enter the hydraulic system,
all work areas must be clean of surface or air-borne contami-
nation.
Mounting: Socket head screws (grade 10.9) according to
DIN EN ISO 4762, torque diagonally alternating.
Pattern to
Series
ISO 4401
D635
03-03-0-05
4 Operating Pressure
Maximum operating pressure p
5 Electrical Connection
Electrical safety: The protective conductor connection is con-
nected to the electronics housing or valve body. The insulation
materials employed are designed for use in the safety extra-
low voltage range.
To comply with safety regulations requires isolation from the
mains according to EN 61558-1 and EN 61558-2-6 and limiting
all voltages according to EN 60204-1. We recommend using
SELV/PELV power supplies.
Rated signal: See nameplate.
External fuse per valve: 1.6 A time lag
Valve phasing: A positive signal (D–E) causes valve opening
P A.
Connector wiring: See wiring schematic tag attached to elec-
tronics housing, or refer to the catalog or the installation draw-
ing.
Connection: Signal lines shielded, shielding connected at
both ends and additionally connected to reference potential
(0 V) at the control side (to improve EMC). Connect the protec-
tive conductor.
Observe technical note TN 353.
6 Hydraulic System Start Up
Pay attention to the pressure setting, the venting instructions
and the alarm messages!
Page 2/2
Ambient
T
–20...60 °C,
A
Socket
Torque
head screw
Pcs.
M5 x 55
4
: See nameplate.
P
7 Venting
Hydraulic fluid squirting out
Hydraulic fluid squirting out under high pressure can
fluid
cause serious personal injuries, burns and fires.
8 Null Adjustment (Pressure)
Remove the locking screw with sealing ring from the cover of
the electronics housing to access the null adjustment potenti-
ometer. Turning the potentiometer shaft results in a spool posi-
tion or pressure change. Turning clockwise will increase valve
opening P A or pressure. After adjustment refit the sealing
ring and the locking screw.
9 Service
Replacing O rings: The mounting surface O rings may be re-
placed by the customer. Pay attention to cleanliness of the
valve and of the surroundings.
Transportation: Before transporting a valve the valve ports
have to be sealed with a clean shipping plate or adhesive tape.
Package the valve carefully to prevent damage during trans-
portation.
[Nm]
Repairs: Repairs may only be carried out by us or by our au-
6.8
thorized service centers.
10 Disposal
It is essential to comply with the relevant national waste dis-
posal regulations and environmental protection provisions
when disposing of valves, spare parts or accessories, packag-
ing that is no longer needed, hydraulic fluid or auxiliary materi-
als and substances used for cleaning!
Mounting and Installation Notes D635 (B97072-635-001; Version 4.0, 03/10)
WARNING
Only vent the valve and the actuator at a low sys-
tem pressure of max. 10 bar (145 psi).
Carefully open the venting screw by approx. one
revolution.
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