1/5
Type series: W1U.../ W1X... (installation deep)
Reference: 400-P-110316-EN-01/01.2022
- Slip-in cartridge valve
- For cavity AD
- All external parts with zinc-nickel plating according to
DIN EN ISO 19598
- Guided valve spool and poppet
- Seat tight shut-o
- Hand lever with or without detent feature
Directional valve
3-way/2-position
Q
max
= 40 l/min, p
max
= 315 bar
mechanical operation, direct acting, poppet type
Type series: W1U.../ W1X... (installation deep)
Description
The 3-way/2-position solenoid-operated directional
seat valves, series W1U… / W1X… (installation deep),
are size 6, direct acting, and pressure balanced screw-
in valves. In the normal condition (non-operated), ow
in port 1 is shut o without leakage. They are desi-
gned on the tried and tested principle of the guided
poppet, and the guide spool has a seal. This valve type
has an underlapped spool. In the crossover position,
all connections are thus connected, i.e., there is a
connection between ports 1, 2, and 3 during the val-
ve’s switching period. This type is the "deep" installati-
on version, which ts into the cavity type according to
the AD factory standard. For the "shallow" installation
version, see separate data sheet. The hand lever can
be turned through 360° and is available as a "deten-
table" (W1U...) or "non-detentable" (W1X...) model. All
external parts of the cartridge 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 predominantly used in certain mobile and indus-
trial applications where leak-tight shut-o functions
are crucially important. Examples are where loads,
tensions, or clamping forces must be held without le-
akage. For self-assembly, please refer to the section
related data sheets.
Symbol
2
1
3
W1U...
2
1
3
W1X...
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Type series: W1U.../ W1X... (installation deep)
Reference: 400-P-110316-EN-01/01.2022
Technical data
General characteristics Description, value, unit
Function group Directional valve
Function 3-way/2-position
Design Slip-in cartridge valve
Controls mechanical operation
Characteristic direct acting, poppet type
Transition/central position of spool/piston zero or underlap/negative (open)
Construction size nominal size 6
Mounting attitude unrestricted
Weight 0.55 kg
Cavity acc. factory standard For cavity AD
Tightening torque steel 5.2 Nm
Tightening torque aluminium 5.2 Nm
Tightening torque tolerance ± 5 %
Minimum ambient temperature - 25 °C
Maximum ambient temperature + 80 °C
Surface protection
All external parts with zinc-nickel plating according to DIN EN
ISO 19598
Sealing material see ordering code
Seal kit order number NBR: DS-387-N / FKM: DS-387-V
Hydraulic characteristics Description, value, unit
Maximum operating pressure 315 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
Mechanical characteristics Description, value, unit
Execution with hand lever, can be turned through 360°
Actuation angle 15 °
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Type series: W1U.../ W1X... (installation deep)
Reference: 400-P-110316-EN-01/01.2022
Performance graphs
measured with oil viscosity 33.0 mm²/s (cSt)
p = f (Q) Performance limit Δp = f (Q) Pressure drop-ow rate characteristic
400-PG-0420
0
50 (700)
100 (1400)
150 (2100)
200 (2900)
250 (3600)
300 (4300)
350 (5000)
Q [l/min (gpm)]
403020100
p [bar (psi)]
(10)(7.5)(5)(2.5)
1) = 1 →2, 2 → 1, 2 → 3
1)
2)
2) = 3 → 2
400-PG-0419
0
10 (140)
20 (285)
30 (430)
40 (570)
Q [l/min (gpm)]
40
200
p [bar (psi)]∆
10 30
(10)
(5)(2.5
)(
7.5)
1) = 2 → 1; 2 → 3
2) = 1 → 2
3) = 3 → 2
1)1)
2)2)
3)3)
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Type series: W1U.../ W1X... (installation deep)
Reference: 400-P-110316-EN-01/01.2022
Dimensions and sectional view
Ø23
(Ø.906)
146.9
(5.78)
126.9
(4.99)
15°
M = 1)
□
40
(□1.57)
M5
4
(0.15)
63.1
(2.48)
104
(4.09)
40.9
(1.61)
10.1
(.398)
6.4
(.252)
Ø14.00×1.78
Ø15.60×1.78
Ø23.52×1.78
Ø20.24×2.62
2×
4
betätigte Stellung/
operated position
1
3
2
Beispiel für die Masseinheit:
Example for the dimensional units:
LQFK
PP PLOOLPHWHU
Installation information
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!
1) When tting the slip-in valves, use
the specied tightening torque for the
mounting screws. The value can be
found in the chapter "Technical data".
Functional principle / Spool variants
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Type series: W1U.../ W1X... (installation deep)
Reference: 400-P-110316-EN-01/01.2022
Ordering code
W1
= directional valve, poppet-type, direct acting
Ex.
A…Q
= standard model according to valid data sheet (standard)
Z…R
= special model after consultation
:
U
= 3-way/2-position, negative spool, with hand lever detenable
8 %5
R
= NBR (nitril-butadien-rubber / BUNA) seals (standard)
T
= FKM (fluorcarvon rubber / VITON) seals
1…9
= technical design no. (omit when ordering)
X
= 3-way/2-position, negative spool, with hand lever non-detenable
(special seals - please consult BUCHER)
Related data sheets
Reference Description
400-P-040011 Form tools
400-P-040112 Cavity AD
400-P-730121 Threaded port body GADA
info.ch@bucherhydraulics.com www.bucherhydraulics.com
© 2022 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.
