1/5
Type series: WR22G_Z5-…
Reference: 400-P-121125-EN-01/01.2021
- Screw-in cartridge valve
- For cavity ALM
- All external parts with zinc-nickel coating according to
DIN EN ISO 19598
- Installation in threaded port body type GALMA
- The slip-on coil can be rotated, and it can be replaced
without opening the hydraulic envelope
- High pressure wet-armature solenoids
- Various plug-connector systems and voltages are
available
- Seat tight shut-o
- Compact construction
- High ow rates
- Low head loss
- Reliable switching, even after long dwell times
Directional valve
2-way/2-position
Q
max
= 40 l/min, p
max
= 350 bar
switching solenoid, pilot operated, poppet type
Type series: WR22G_Z5-…
Description
The 2-way/2-position solenoid-operated directional
seat valves, series WR22_Z..., are size 5, two stage,
pressure balanced screw-in valves with an M20x1,5
mounting thread. The main and pilot stages are both
designed on the poppet/seat principle, and the 1 to 2
ow path is therefore virtually leak-free. The straight-
forward design delivers a good price/performance ra-
tio and outstanding head loss/ ow ratings. All exter-
nal parts of the screw-in valves are zinc-nickel plated,
and are thus suitable for use in the harshest opera-
ting environments. The slip-on coils can be replaced
without opening the hydraulic envelope and can be
positioned at any angle through 360°. These valves
are primarily used as pilot valves in certain mobile
and industrial applications where leak-tight shut-o
functions are crucially important. Examples are where
loads, tensions, or clamping forces must be held wi-
thout leakage. For self-assembly, please refer to the
section related data sheets.
Symbol
2
1
2/5
Type series: WR22G_Z5-…
Reference: 400-P-121125-EN-01/01.2021
Technical Data
General Characteristics Description, value, unit
Function group Directional valve
Function 2-way/2-position
Design Screw-in cartridge valve
Controls switching solenoid
Characteristic pilot operated, poppet type
Construction size nominal size 5
Thread size M20×1,5
Mounting attitude unrestricted
Weight 0.40 kg
Cavity acc. factory standard For cavity ALM
Tightening torque steel 50 Nm
Tightening torque aluminium 50 Nm
Tightening torque tolerance ± 10 %
Minimum ambient temperature - 25 °C
Maximum ambient temperature + 50 °C
Surface protection
All external parts with zinc-nickel coating according to DIN EN
ISO 19598
Available seal types several seal types available, see ordering code
Seal kit order number NBR: DS-245-N / FKM: DS-245-V
Hydraulic Characteristics Description, value, unit
Maximum operating pressure 350 bar
Maximum ow rate 40 l/min
Flow direction see symbol
Hydraulic uid
HL and HLP mineral oil according to DIN 51 524; other uids
on request!
Minimum uid temperature - 25 °C
Maximum uid temperature + 80 °C
Viscosity range 10 … 500 mm²/s (cSt)
Recommended viscosity range 15 … 250 mm²/s (cSt)
Minimum uid cleanliness (cleanlineless class according to ISO
4406:1999)
class 20/18/15
NOTE!
The switching safety of the valve is achieved
by the volume ow and pressure drop (Δp).
Electric Characteristics Description, value, unit
Actuator type solenoid coil
Solenoid coils type D36
Supply voltage DC 12/24 V DC
Supply voltage AC 115/230 V AC (50 … 60 Hz)
Supply voltage tolerance ± 10 %
Maximum permissible power consumption
Version "E": V DC = 17 W / V AC = 17 W
Version "N": V DC = 27 W / V AC = 25 W
Switching time
Version "E": 30…120 ms (energized) / 75…220 ms (de-energi-
zed) Version "N": 30…140 ms (energized) / 35…95 ms (de-ener-
gized)
3/5
Type series: WR22G_Z5-…
Reference: 400-P-121125-EN-01/01.2021
Electric Characteristics Description, value, unit
Relative duty cycle 100 %
Electrical connection coil several connection types available, see ordering code
Protection class solenoid coil to ISO 20 653 / EN 60 529
several classes of protection available, see ordering code (with
appropriate mating connector and proper tting and sealing)
NOTE!
The switching time can be strongly de-
pendent on ow rate, pressure, oil
viscosity and the dwell time under
pressure. In practice, the switching time may th-
erefore deviate from the specied value range.
Performance graphs
measured with oil viscosity 33.0 mm²/s (cSt), coil at steady-state temperature and 10 % undervoltage
p = f (Q) Performance limit Δp = f (Q) Pressure drop-ow rate characteristic
400-PG-0306
Q [l/min]
p [bar (psi)]
010203
04
0
0
50 (700)
100 (1400)
150 (2100)
200 (2900)
250 (3600)
300 (4300)
350 (5000)
(2.5)(5) (7.5
)(
10)
Version "E" - 17 W
1) 2 → 1, solenoid de-energized
2) 1 → 2, solenoid energized
3) 2 → 1, solenoid energized
Q [l/min
]
10 20 30
40
(2.5) (5)(7.5)
(10)
400-PG-0310
0
4 (60)
8 (120)
12 (170
)
16 (230
)
20 (285
)
0
p [bar (psi)]∆
1)
2)
3)
Δp = f (Q) Pressure drop-ow rate characteristic
1) 2 → 1, solenoid de-energized
2) 1 → 2, solenoid energized
3) 2 → 1, solenoid energized
Version "N" – 27/25 W
400-PG-0309
0
0
p [bar (psi)]
∆
1)
2)
3)
4 (60)
8 (120)
12 (170
)
16 (230
)
20 (285
)
Q [l/min
]
10 20 30
40
(2.5)(5) (7.5
)(
10
)
4/5
Type series: WR22G_Z5-…
Reference: 400-P-121125-EN-01/01.2021
Dimensions and sectional view
54.5
(2.14)
1
2
M20×1,5
24
0$
Ø36
(Ø1.41)
45
(1.77)
0$
>1P@
>IWyOE@
s
72.5
(2.85)
71
(2.79)
26
(1.02)
97
(3.81)
Beispiel für die Masseinheit:
Example for the dimensional units:
LQFK
PP PLOOLPHWHU
Ø16.00×2.00
Ø16.00×2.00
Ø17.17×1.78
Ø10.82×1.78
Ø9.90×1.45×1.40
Installation information
NOTE!
1) When tting the screw-in cartridge valve,
use the specied tightening torque. The value
can be found in the chapter "technical data".
ATTENTION!
Only qualied personnel with mechanical
skills may carry out any maintenance work.
Generally, the only work that should ever be
undertaken is to check, and possibly replace,
the seals. When changing seals, oil or grease
the new seals thoroughly before tting them.
NOTE!
The seals are not available individual-
ly. The seal kit order number can be
found in the chapter "Technical data".
5/5
Type series: WR22G_Z5-…
Reference: 400-P-121125-EN-01/01.2021
Ordering code
electrically operated, V DC = 17 W / V AC = 17 W (standard)
electrically operated, V DC = 27 W / V AC = 25 W
N
=
22G
W=
directional valve
R=
check valve function, pilot operated
22
G=2-way/2-position, normally closed
Z=
thread size M20×1,5 for cavity ALM
5=
nominal size 5
1 ...
9=technical design no. (omit when ordering)
...
= voltage e.g. 24 (24 V)
D=
current DC
A
= current AC
_
-
Ex.
24
_
ZE 55RW D
E=
(blank)
=
V=
FKM (fluorocarbon rubber / VITON) seals
(special seals - please consult BUCHER)
NBR (nitril-butadien-rubber / BUNA) seals (standard)
Deutsch plug connection 45° DT04-2P (with protection diode, IP 67/69K)
Deutsch plug connection 45° DT04-2P (IP 67/69K)
Junior Timer axial plug connection (with protection diode, IP 65)
Junior Timer radial plug connection (with protection diode, IP 65)
Kostal plug connection (IP 65)
C
JT
IT
D
DT
=
=
=
=
=
mating plug not supplied
AMP Superseal 1.5 (IP 67) / Metri-Pack 150 (IP 65) plug connectionS =
(blank)
=DIN EN 175301-803 connection, 3-pole 2 P+E with mating plug (IP 65) (standard)
M100=DIN EN 175301-803 connection, 3-pole 2 P+E
flying leads (500 mm)F =
Related data sheets
Reference Description
400-P-040011 Forming tools
400-P-040201 Cavity ALM
400-P-720105 Threaded port body GALMA
400-P-120110 Solenoid coil D36
info.ch@bucherhydraulics.com www.bucherhydraulics.com
© 2021 by Bucher Hydraulics AG Frutigen, 3714 Frutigen, Switzerland
All rights reserved.
Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The
information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual
improvement, we reserve the right to amend the product specifications contained in this catalogue.
