2/2 Logic Cartridge Valve, Size 16
Q
max
= 350l/min,p
max
= 420bar
Active Control,Seated Design
Series WL22SD…
1/6
Reference: 400-P-160101-EN-03
Issue: 02.2023
S Active control
S Area ratio 2 : 1
S High flow rates with low Dp
S Seat-valve shut-off from 1 " 2 and 2 " 1
S No pilot oil consumption at 3
S With or without seal on the seated valve spool
S Various opening pressures
S With integral orifice for pilot port
S All exposed parts with zinc-nickel plating
S Can be fitted in a line-mounting body
1 Description
Series WL22SD... actively controlled 2/2 logic valves are
size 16, high performance screw-in cartridges with an M42
x 2 mounting thread. The conical-seat design ensures that
the cartridges are leak-tight from 1 → 2 and from 2 → 1.
When the same pressure exists at ports 1, 2 and 3, the valve
spool is held in its closed position by the ≥ 2bar compres
sion spring. The 1 → 2 and 2→1 connection is opened or
closed by relieving or pressurising the pilot port 3, bearing
in mind the corresponding area- and pressure-ratios. 2/2
logic cartridge valves can be used in both mobile and indus
trial applications. All external parts of the cartridge are zinc-
nickel plated according to DIN EN ISO 19 598 and are thus
suitable for use in the harshest operating environments. For
self-assembly, please refer to the section related data
sheets.
2 Symbol
WL22SD …
3 Technical data
General characteristics Description, value, unit
Designation 2/2 logic cartridge valve
Design actively controlled, conical-seat type
Mounting method screw-in cartridge M42x2
Tightening torque 200 Nm ± 10%
Size nominal 16mm, cavity type EB
Weight 1.10 kg
Mounting attitude unrestricted
Ambient temperature range -25°C… +80°C
400-P-160101-EN-03/02.2023
Series WL22SD…
2/6
Description, value, unitGeneral characteristics
Flow direction 1 → 2 / 2 → 1, 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 350l/min
Pressure drop Δp < 5 bar at 100l/min
Opening pressure: - standard
- optional
2.0 bar
0.4
1)
/ 6 / 10 / 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.
4 Performance graphs
measured with oil viscosity 33 mm
2
/s (cSt)
P0404.ai
0
5
10
20
25
Q [l/min]350250200150100500
1
2
300
15
Δp = f (Q) Pressure drop - Flow rate characteristic
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 1 → 2 / 2 → 1 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-160101-EN-03/02.2023
Series WL22SD…
3/6
5 Dimensions, sectional view
97.2
5.2
24.273
6kt SW46
M42X2
4
5
2
1
3
46
1
2
3
M
A
= 200 [Nm] ± 10 %
Ø 49
A
3
= 100 %
A
2
= 50 %
A
1
= 50 %
6 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-359-N
1)
Item Qty. Description
1 1 O-ring No.129 ∅39.34x2.62 N90
2 1 O-ring No.125 ∅32.99x2.62 N90
3 1 O-ring No.124 ∅31.42x2.62 N90
5 2 Backup ring ∅32.0x2.0x1.4 FI0751
6 2 Backup ring ∅30.0x2.0x1.4 FI0751
IMPORTANT!
1)
Seal kit with FKM (Viton) seals, no. DS-359-V
400-P-160101-EN-03/02.2023
Series WL22SD…
4/6
7 Area- and pressure-ratios
B
A
Z
A
Z
A
B
A
A
Area A
3
: Area A
1
= 2 : 1
Area A
3
: Area A
2
= 2 : 1
Area A
1
: Area A
2
= 1 : 1
8 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-160101-EN-03/02.2023
Series WL22SD…
5/6
9 Ordering code
_
WL22 = 2/2 logic cartridge valve
SD = seat valve with spool seal (standard)
1 = orifice Ø 0.8
2 = orifice Ø 0.5 (standard)
3 = orifice Ø 1.6
4 = orifice Ø 1.4
5 = orifice Ø 1.3
6 = orifice Ø 1.2
7 = orifice Ø 1.1
8 = orifice Ø 1.0
9 = orifice Ø 0.9
0 = orifice Ø 0.7
2 = area ratio (main spool : seat = 2 : 1)
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
5 = opening pressure 6.0 bar
7 = opening pressure 13 bar
A ... Q = standard model − see relevant data sheets
Z ... R = special features − please consult Bucher
16 = nominal size 16
(blank) = Nitrile seals (standard)
V = Viton seals
(special seals − please consult Bucher)
1 ... 9 = design number (omit when ordering)
16−AEx.
_
WL22 3D12SD
_
−
* Orifice in valve spool has to be at least 30% smaller than orifice in port ”3”.
_
_
S ** = seat valve without spool seal
(blank) = standard spool
U = soft−switching (only with R spool, active control)
_
R=
L = active control (no nose, not soft−switching)
(blank) = no nut, standard (nut at spool end only by L and R)
N = with nut
(blank) = no orifice
optional orifice in valve spool * (type G / M5)
D1 = orifice Ø 0,8
D3 = orifice Ø 1,5
optional orifice in port 3 (type G / M3)
1 ** = opening pressure 0.4 bar
3 = opening pressure 2.0 bar (standard)
6
=
opening pressure 10 bar
400-P-160101-EN-03/02.2023
Series WL22SD…
6/6
10 Related data sheets
Reference no. (Old no.) Description
400-P-040011 (i-32) The form-tool hire programme
400-P-080111 (i-55.2) Cavity type EB
400-P-750115 Line-mounting body, type GEBAA (G1”)
400-P-010101 MTTF
D
values for hydraulic valves
E 2023 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.-.305.330.335