2/2 Logic Cartridge Valve, Size 10
Q
max
= 150l/min,p
max
= 420bar
Active Control,Seated Design
Series WL22SD…
1/5
Reference: 400-P-140101-EN-01
Issue: 05.2020
S Active control
S Area ratio 2 : 1
S High flow rates with low Dp
S Seat-valve shut-off from A " B and B " A
S No pilot oil consumption at Z
S With or without seal on the seated valve spool
S Various opening pressures
S With integral orifice for pilot port
S All external parts zinc plated, chromited (CrVI-free)
S Can be fitted in a line-mounting body
9 Description
Series WL22SD... actively controlled 2/2 logic valves are
size 10, high performance screw-in cartridges with an M27
x 2 mounting thread. The conical-seat design ensures that
the cartridges are leak-tight from A → B and from B → A.
When the same pressure exists at ports A, B and Z, the
valve spool is held in its closed position by the ≥ 2bar
compression spring. The A → B and B→A connection is
opened or closed by relieving or pressurising the pilot port
Z, bearing in mind the corresponding area- and pressure-
ratios. 2/2 logic cartridge valves can be used in both mobile
and industrial applications. All external parts are zinc plated
and chromited (CrVI-free) and are thus suitable for use in
the harshest operating environments. If you intend to
manufacture your own cavities or are designing a line-
mounting installation, please refer to the section ”Related
data sheets”.
10 Symbol
WL22SD …
11 Technical data
General characteristics Description, value, unit
Designation 2/2 logic cartridge valve
Design actively controlled, conical-seat type
Mounting method screw-in cartridge M27x2
Tightening torque 150 Nm ± 10%
Size nominal 10mm, cavity type DJ
Weight 0.21 kg
Mounting attitude unrestricted
Ambient temperature range -25°C… +80°C
400-P-140101-EN-01/05.2020
Series WL22SD…
2/5
Description, value, unitGeneral characteristics
Flow direction A → B / B → A, see symbol
MTTF
D
values 150 years, see data sheet 400-P-010101-en
Hydraulic characteristics Description, value, unit
Maximum operating pressure 420bar
Maximum flow rate 150l/min
Pressure drop Δp < 5 bar at 100l/min
Opening pressure: - standard
- optional
2.0 bar
0.4
1)
/ 1.0
1)
/ 3.0 / 6.0 / 7.5 / 13 bar
Hydraulic fluid HL and HLP hydraulic oils to DIN 51 524;
for other fluids, please consult Bucher
Hydraulic fluid temperature range -25°C… +80°C
Viscosity range 10 … 650mm
2
/s (cSt), recommended 15...250mm
2
/s (cSt)
Minimum fluid cleanliness level
Cleanliness class to ISO 4406:1999
class 20/18/15
1)
only recommended for use when the seated valve spool is not fitted with a seal.
12 Performance graphs
measured with oil viscosity 33 mm
2
/s (cSt)
Δp = f (Q) Pressure drop - Flow rate characteristic
P0008.ai
0
5
10
15
20
Q [l/min]1501251007550250
1
2
1 = cavity type DJ with annular groove
2 = cavity type DJ without annular groove
Attention:
The Δp characteristic is valid when the load
pressure in the A → B / B → A connection is higher
than the opening pressure. If the load pressure is
lower than the opening pressure, the load
pressure must first rise to overcome the opening
pressure before flow can occur.
400-P-140101-EN-01/05.2020
Series WL22SD…
3/5
13 Dimensions, sectional view
Typenbezeichnung
Model code
Ø 34
73
57 16
308
4
1
2
5
3
6
A
Z
B
M27 x 2
A
Z
=100 %
A
B
=50 %
A
A
=50 %
M
A
=150 [Nm] ±10 %
M
A
=60 [Nm] ±10 %
14 Installation information
Important:
No adjustments are necessary, since the
cartridges are set in the factory.
Attention:
Only qualified personnel with mechanical skills
may carry out any maintenance work. Generally,
the only work that should ever be needed is to
check and possibly replace the seals. When
changing seals, oil or grease the new seals
thoroughly before fitting them.
NBR seal kit no. DS-296-N
1)
Item Qty. Description
1 1 O-ring No.119 ∅23.47x2.62 N90
2 1 O-ring No.116 ∅18.72x2.62 N90
3 1 O-ring No.114 ∅15.54x2.62 N90
4 1 O-ring No. 016 ∅15.60x1.78 N90
5 2 Backup ring ∅17.1x2.0x1.4 FI0751
6 2 Backup ring ∅15.3x2.0x1.4 FI0751
IMPORTANT!
1)
Seal kit with FKM (Viton) seals, no. DS-296-V
15 Area- and pressure-ratios
B
A
Z
A
Z
A
B
A
A
Area A
Z
: Area A
A
= 2 : 1
Area A
Z
: Area A
B
= 2 : 1
Area A
A
: Area A
B
= 1 : 1
400-P-140101-EN-01/05.2020
Series WL22SD…
4/5
16 Adjuster types (optional)
Type ”E” adjuster (WL22S.E2D...)
Important
Can be used to limit the opening stroke, for
example, or to block the valve spool in the closed
position.
2)
52
9,5
24
16
5
M
A
=60 [Nm] ±10 %
”E” adjuster with ”P” tamper-proof cap (WL22S.P2D…)
Important
Valve settings can be sealed by fitting the tamper-
proof cap. To fit the cap, the snap ring
2)
has to be
removed. Subsequent adjustment is only
possible by destroying the tamper-proof cap.
58,5
2)
Snap ring (remove for ”P” model)
17 Application examples (active control)
Simplified symbol
B
AT
L
Application with seat valve
B
A
Ø 0,8
B
A
T
L
Z
V1
V3
V2
Logic valve application for lowest possible vented pressure
with a proportional throttle and bypass compensator
B
A
Z
PT
Ø 0,8
T
L
10 bar
V4
V5
V6
Advantage
When the logic cartridge valve is open (flow A → B / B → A), there is no continuous flow of pilot oil to Z.
V1
= logic cartridge valve
V2
= 3/2 seat valve
V3
= shuttle valve
V4
= proportional throttle cartridge
V5
= logic cartridge valve
V6
= bypass pressure compensator cartridge
400-P-140101-EN-01/05.2020
Series WL22SD…
5/5
18 Ordering code
_
10B2WL22
WL22 = 2/2 logic cartridge valve
SD = seat valve with spool seal (standard)
S (∗) = seat valve without spool seal
(blank) = non-adjustable (standard)
E = adjustable
P = adjustable; adjuster is sealed
2 = area ratio (main spool : seat = 2 : 1)
D1 = fixed orifice in port Z Ø 0.8 (standard)
D2 = orifice Ø 0.6
D3 = orifice Ø 1.5
D4 = orifice Ø 1.4
D5 = orifice Ø 1.3
D6 = orifice Ø 1.2 optional orifice in port Z (type G / M3)
D7 = orifice Ø 1.1
D8 = orifice Ø 1.0
D9 = orifice Ø 0.9
D0 = orifice Ø 0.7
(blank) = no orifice
1 (∗) = opening pressure 0.4 bar
2 (∗) = opening pressure 1.0 bar
3 = opening pressure 2.0 bar (standard)
4 = opening pressure 3.0 bar
5 = opening pressure 6.0 bar
6 = opening pressure 7.5 bar
7 = opening pressure 13 bar
B ... Q = standard model - see relevant data sheets
Z ... R = special features - please consult Bucher
10 = nominal size 10 mm
(blank) = Nitrile seals (standard)
V = Viton seals
(special seals - please consult Bucher)
1 ... 9 = design number (omit when ordering new units)
-Ex.
_
3D1SD
_
-
(∗) In applications with an opening pressure of less than 2 bar, valve type WL22S2 ... must be used.
I.e. the seal on the spool is omitted, and the valve is not leak-tight from A → B.
19 Related data sheets
Reference no. (Old no.) Description
400-P-040011 (i-32) The form-tool hire programme
400-P-060181 (i-45.11) Cavity type DJ
400-P-740131 (G-24.31) Line-mounting body, type GADJA (G3/4”)
400-P-010101 MTTF
D
values for hydraulic valves
E 2020 by Bucher Hydraulics AG Frutigen, CH-3714 Frutigen
www.bucherhydraulics.cominfo.ch@bucherhydraulics.com
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.
Classification: 430.300.-.305.320.335