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D633K, D634K and D635K Series
2.3
Technical data
Series
Mounting pattern
Mounting direction
Vibration
Mass
Rated flow
at Δp
= 5 bar per land, tolerance ±10 %
N
Max. valve flow
Max. operating pressure
2)
Ports P, A, B
Port T without use of port Y
Port T with Y
Port Y
Temperature range
Ambient
Fluid
Operating fluid
3)
Viscosity
recommended
allowable
Class of cleanliness according to
ISO 4406
1)
Drain port Y must be used
with 3- and 4-way operation and p
with 2x2-way operation
2)
Max. operating pressure will be limited by the
nominal pressure of the pressure transducer.
See nameplate of the valve.
3
Installation
3.1
General Information
3.1.1
Compare model number and valve type with information
from the hydraulic schematic or bill of material.
3.1.2
The valve can be mounted in all directions, fixed or move-
able.
3.1.3
Check mounting surface on planeness (0.01 mm for
100 mm) and surface roughness (Ra < 0.8 µm).
3.1.4
Pay attention to cleanliness of mounting surface and sur-
roundings when installing the valve.
3.1.5
Use lint-free tissue to clean!
3.1.6
Before installation, remove protection plate from the valve
and keep it for later repair.
3.1.7
Use socket head bolts according to DIN EN ISO 4762,
strength class 10.9 for mounting and tighten them diago-
nally changing according to following table (tolerance
±10 %).
Mounting
Series
pattern
ISO 4401
D633/5K 03-03-0-05
D634K
05-05-0-05
3.1.8
Pay attention to correct position of ports and location of
o-rings during installation.
© 2003, 2007, 2009 Moog GmbH
venting pressure control valve
3)
The cleanliness of the hydraulic fluid greatly influences
> 50 bar
the functional safety and the wear and tear of the
T
valve. In order to avoid malfunctions and increased
wear and tear, we recommend filtrating the hydraulic
fluid accordingly.
4)
For long life wear protection of metering lands
Bolts to
Torque
DIN EN ISO 4762 Qty.
M5 x 55
4
M6 x 60
4
Operating Instructions D633K, D634K and D635K (CA49304-001; Version 6.0, 12/09)
D633K, D635K
ISO 4401-03-03-0-05
with or without drain port Y
any, fixed or moveable
30 g, 3 axis
[kg]
2.5
[l/min]
see nameplate of the valve
[l/min]
75
[bar]
350
[bar]
50
[bar]
350
directly to tank
[°C]
see 1.2.1 on page 3
[°C]
mineral oil based hydraulic
fluid according DIN 51524,
part 1 to 3, others upon request
[mm²/s]
15 to 100
[mm²/s]
5 to 400
15 / 12 or better
3.2
Venting of pressure transducer at D635K
Trapped air can lead to the diesel effect, particularly
in the case of high peak pressure levels in the system.
This diesel effect can lead to damage to the pressure
transducer integrated in the valve (from zero offset-
ting to complete destruction).
The internal connection to the pressure transducer in the
valve should for this reason be vented via the venting screw
(as described below) when the valve is installed or the hy-
draulic circuit is opened. If the consumer is at a higher atti-
tude than the P-valve it should also be vented at the highest
point.
We recommend that attention be paid to the installa-
tion position when installing the valve so that venting
can be carried out effectively (venting screw at top).
[Nm]
The power supply (24 V) should be applied to the valve prior
10.9
to venting. The pressure setpoint should be set to produce
8.5
a pressure of about 10 bar in connection A at a maximum
supply pressure of 15 bar.
13
Only vent at low system pressure!
Risk of injury!
D634K
ISO 4401-05-05-0-05
1)
with or without drain port Y
any, fixed or moveable
30 g, 3 axis
7
see nameplate of the valve
185
350
50
350
directly to tank
see 1.2.1 on page 3
mineral oil based hydraulic
fluid according DIN 51524,
part 1 to 3, others upon request
15 to 100
5 to 400
4)
15 / 12 or better
For additional technical infor-
mation, such as dimensions,
ordering information etc. see
catalogue D633/D634 and
D635 Series.
1)
4)
5
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