E 5.955.3.0/12.10
474
3/3 Directional Valve
Hydraulically Operated,
Direct Acting
SAE-10 Cartridge – 250 bar
WKH10DC
Up to 45 l/min
Up to 350 bar
The WKH10DC is a hydraulically
operated 3/3 directional valve in a 4-way
cavity. In the spring-centred
normal position all ports are closed.
When there is an increase in pressure at
port 2 against the spring force, the valve
opens between port 3 and port 4. Oil can
ow through the valve in both directions.
When there is an increase in pressure at
port 4 against the spring force, the valve
opens between port 2 and port 3. Oil can
ow through the valve in both directions.
GENERAL
z Principal application is as a ushing valve for hydrostatic drives
z Excellent stability throughout ow range
z All exposed surfaces zinc-plated and corrosion-proof
z All valve parts made of high-strength steel with hardened and ground components
to ensure minimal wear and extended service life
z Versions available with various switch pressures
FuNctioN
SPEciFicAtioNS
Operating pressure: max. 350 bar
Nominal ow: max. 45 l/min
Internal leakage: max. 400 cm³/min at 350 bar
and 36 mm²/s
Media operating temperature range: min. -30 °C to +100 °C
Ambient temperature range: min. -30 °C to +100 °C
Fluid: Hydraulic oil to DIN 51524 Part 1 and 2
Viscosity: 10 mm²/s to 420 mm²/s recommended
Filtration: Class 21/19/16 to ISO 4406
or cleaner
MTTF
d
: 150 years
Installation: No orientation restrictions
Materials: Valve body: steel
Piston: hardened and
ground steel
Seals: NBR (standard)
FKM (optional,
temperature range
to -20 °C)
Back-up ring: PTFE
Cavity: FC10-4 (port 1 not used)
Weight: ≈ 0.115 kg
475
E 5.955.3.0/12.10
ModEL codE
WKH 10 DC / 24 – 01 – C – N – 050
Basic model
3/3 directional valve,
hydraulically operated
Cavity
UNF, nominal size 10
Function symbol
Internal pressure tap
24 = at port 2 and port 4
Type
01 = standard, negative overlap in centre position
14 = positive overlap in centre position
81 = def. leakage 2-3 l/min at 9 bar in centre position
Body and ports*
C = cartridge only
Versions with bodies on request
Seals
N = NBR (standard)
V = FKM (optional)
Switch pressure
050 = 3.5 bar (50 PSI)
diMENSioNS
Millimeter (Inch)
Subject to technical modications
Millimeter (Inch)
Subject to technical modications
cAvity
UNF FC10-4
SW 1",
torque 35
+5
Nm
4 → 3
0 5 10 15 20 25 30 35 40 45
0
4
8
12
16
20
2 → 3
PERFoRMANcE
Standard models
Model code Part No.
WKH10DC/24-14-C-N-050 3481315
WKH10DC/24-81-C-N-050 3543256
Other models on request
*Standard line bodies
Code Part No. Material Ports Pressure
FH104-SB4 3037784 Steel, zinc-plated 1/2 BSP 420 bar
FH104-AB4 3038097 Aluminium, anodised 1/2 BSP 245 bar
Other line bodies on request
Seal kits
Code Material Part No.
FS104-N SEAL KIT NBR 3051912
FS104-V SEAL KIT FKM 3071275
Measured at n = 46 mm²/s,
T
oil
= 40 °C
Cartridge form tools
Tools Part No.
Countersink 176174
Reamer 176175
pressure drop Dp [bar]
Flow [l/min]
HYDAC Fluidtechnik GmbH
Justus-von-Liebig-Str.
D-66280 Sulzbach/Saar
Tel: 0 68 97 /509-01
Fax: 0 68 97 /509-598
E-Mail: utec@hydac.com
NOTE
The information in this brochure relates to
the operating conditions and applications
described.
For applications or operating conditions
not described, please contact the relevant
technical department.
Subject to technical modications.
thick
