2/2 Logic Cartridge Valve, Size 10
Q
max
= 150l/min,p
max
= 420bar
Passive Control,Seated Design
Series WL22SDLN…, WL22SDRN…, WL22SDPN…
1/6
Reference: 400-P-140121-EN-02
Issue: 05.2022
S Passive control
S Area ratio 2 : 1
S Valve spool with 2 mm or 4 mm nose and notch
S High flow rates with low Dp
S Seat-valve shut-off from A " B and B " A
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
1 Description
Series WL22SDLN..., WL22SDRN..., and WL22SDPN
passively controlled 2/2 logic valves are size 10, high per
formance 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 reliev
ing or closing the pilot port Z. When the Z port is vented (A
→ B and B → A connection open), there is a continuous dis
charge of pilot oil through the spool orifice, the flow rate
being dependent on the Δp in A, B and Z. When port Z is
closed, the check valves that are incorporated in the valve
spool allows the pressure in Z to rise to the higher of the two
pressures in A and B. The area ratio AZ : AA = 2 : 1 results
in a net force on the valve spool, thus closing the A → B con
nection. If the same pressure exists at the A and B ports,
closing port Z will still cause the valve spool to close, but only
due to the ≥ 2 bar spring. The valve's opening and closing
switching times can be influenced by using suitable orifices
pairings (in the valve spool and in port Z) and spool nose
length (2 mm or 4 mm). 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 design
ing a line-mounting installation, please refer to the section
”Related data sheets”.
2 Symbol
WL22SDLN…,WL22SDRN…,WL22SDPN…
3 Technical data
General characteristics Description, value, unit
Designation 2/2 logic cartridge valve
Design passively 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
400-P-140121-EN-02/05.2022
Series WL22SDLN…, WL22SDRN…, WL22SDPN…
2/6
Description, value, unitGeneral characteristics
Ambient temperature range -25°C… +80°C
Flow direction A → B / B → A, see symbol
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 / 1.0 / 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
4 Performance graphs
measured with oil viscosity 33 mm
2
/s (cSt)
Δp = f (Q) Pressure drop - Flow rate characteristic
- WL22SDLN… (no spool nose)
- WL22SDRN… (with spool nose, 2 mm notch)
P0014.ai
0
5
10
15
20
Q[l/min]1501251007550250
p[bar]
1
2
1 = Cavity type DJ with annular groove
2 = Cavity type DJ without annular groove
Δp = f (Q) Pressure drop - Flow rate characteristic
- WL22SDPN... (with spool nose, 4 mm notch)
P0015.ai
0
5
10
15
20
Q[l/min]1501251007550250
p[bar]
1
2
Attention:
The Δp characteristic is valid when the load pres
sure 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-140121-EN-02/05.2022
Series WL22SDLN…, WL22SDRN…, WL22SDPN…
3/6
5 Dimensions, sectional view
Model with no nose on the valve spool (WL22SDLN…)
16
73
57
A
Z
=100 %
A
B
=50 %
A
A
=50 %
4
1
2
5
3
6
A
Z
B
M27 x 2
30
8
Typenbezeichnung
Model code
Ø34
M
A
=150 [Nm] ±10 %
M
A
=60 [Nm] ±10 %
I
1
= orifice in valve spool
I
2
= orifice in pilot port Z
I
3
= valve spool end with slot
I
4
= spool nose with 2 mm notch
I
5
= spool nose with 4 mm notch
I
6
= integral check valves
Model with nose and notch on the valve spool
- 2 mm nose (WL22SDRN…)
- 4 mm nose (WL22SDPN…)
M27 x 2
4
16
73
57
2
4
1
2
5
3
6
A
Z
B
A
Z
=100 %
A
B
=50 %
A
A
=50 %
8
Typenbezeichnung
Model code
I
5
I
1
I
2
I
3
I
4
I
6
30
Ø34
M
A
=150 [Nm] ±10 %
M
A
=60 [Nm] ±10 %
6 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-140121-EN-02/05.2022
Series WL22SDLN…, WL22SDRN…, WL22SDPN…
4/6
7 Adjuster types (optional)
Type ”E” adjuster (WL22S...E2D...)
Important
Can be used to limit the opening stroke, for exam
ple, or to block the valve spool in the closed posi
tion.
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 poss
ible by destroying the tamper-proof cap.
58,5
2)
Snap ring (remove for ”P” model)
8 Installation information
Important:
No adjustments are necessary, since the cartrid
ges 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 thor
oughly before fitting them.
NBR seal kit no. DS-296-N
1)
Item Pcs. 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
400-P-140121-EN-02/05.2022
Series WL22SDLN…, WL22SDRN…, WL22SDPN…
5/6
9 Application examples
Simplified symbol
B
P T
A
Simplified symbols
B
A
B
AT
L
T
L
Application with 4/3 spool valve
B
A
A
P
Z
B
B
A
Z
B
A
Z
B
A
Z
T
B
P
T
A
Ø 0,8
Ø 0,8
Ø 0,8
Ø 0,8
V1
V1 V1
V1
V2
Application with 2/2 seat valve
B
A
Z
V3
V4
Ø
0,8
Application with 2/2 spool valve
B
A
Z
V3
V5
Ø
0,8
Passively controlled
In the open condition (flow A → B / B → A), there is a continuous flow of pilot oil.
V1
= logic cartridge valve
V2
= 4/3 spool valve (pilot stage)
V3
= logic cartridge valve
V4
= 2/2 seat valve (pilot stage)
V5
= 2/2 spool valve (pilot stage)
10 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-140121-EN-02/05.2022
Series WL22SDLN…, WL22SDRN…, WL22SDPN…
6/6
11 Ordering code
_
WL22 = 2/2 logic cartridge valve
SD = seat valve with spool seal
P = passive control, with 4 mm spool nose (length)
N = with slot in the valve spool (standard)
1 = orifice Ø 0.8 (standard)
2 = orifice Ø 0.6
3 = orifice Ø 1.5
4 = orifice Ø 1.4
5 = orifice Ø 1.3
7 = orifice Ø 1.1
8 = orifice Ø 1.0
9 = orifice Ø 0.9
0 = orifice Ø 0.7
(blank)
E
= non−adjustable (standard)
= adjustable
2 = area ratio (main spool : seat = 2 : 1)
D3 = orifice Ø 1.5
D4 = orifice Ø 1.4
D5 = orifice Ø 1.3
D6 = orifice Ø 1.2
D7 = orifice Ø 1.1
D8 = orifice Ø 1.0
D9 = orifice Ø 0.9
(blank) = no orifice
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
B ... Q =
10 = nominal size 10 mm
(blank) = Nitrile seals (standard)
V = Viton seals
1 ... 9 = design number (omit when ordering new units)
10−BEx.
_
WL22 3D12SD
_
L 1
_
−
* Orifice in valve spool has to be at least 30% smaller than orifice in port ”Z”.
L = passive control, no spool nose
R = passive control, with 2 mm spool nose (length)
E 2022 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