2/2 Logic Cartridge Valve, Size 16
Q
max
= 350l/min,p
max
= 420bar
Passive Control, Seated Design, Soft Switching
Series WL22SDUR…
1/4
Reference: 400-P-160151-EN-02
Issue: 02.2020
S Area ratio 2 : 1
S High flow rates with low Δp
S Seat-valve shut-off from
1 → 2 and 2 → 1
S Glide seal on the seated valve spool
S Various opening pressures
S Orifice for pilot port is integrated in
the cartridge
S All exposed parts with zinc-nickel
plating
S Can be fitted in a line-mounting body
1 Description
Series WL22SDUR...-16 logic cartridges are 2/2, screw-in,
actively controlled valves with the 2 switched positions ”ON”
and ”OFF”, 2 main ports 1 and 2, a pilot port 3, and a closing
spring. A passive control system is integrated in the seated
valve spool. Spool damping has been incorporated to pro
vide soft-switching.
All external parts are chromited (Cr VI-free) and are thus sui
table for use in the harshest operating environments.
For customers who manufacture their own manifold blocks,
we offer form-tool sets for sale or hire. Use the GEBAA body
with threaded ports (G1”) for line-mounting applications.
2 Symbol
2
3
1
WL22SDUR ...
3 Main characteristics
Designation 2/2 logic cartridge valve
Design direct acting conical-seat type
Mounting method screw-in cartridge M42 x 2
Size nominal size 16 mm, cavity type EB
to ISO 7789-42-06-0-07
Weight kg 1.10
Mounting attitude unrestricted
Flow direction 1 → 2 / 2 → 1, see symbol
Operating pressure range in 1, 2 and 3 bar ... 420
Opening pressure: standard
as an option
bar
2.0
0.4 / 6 / 10 / 13
Flow rate Q
max.
l/min 350
Hydraulic fluid HL and HLP hydraulic oils to DIN 51 524;
for other fluids, please consult BUCHER
Fluid temperature range _C -25 ... +80
400-P-160151-EN-02/02.2020
Series WL22SDUR…
2/4
Ambient temperature
_C -25 ... +80
Viscosity range mm
2
/s
(cSt)
10 ... 650
recommended 15 ... 250
Minimum fluid cleanliness level 20/18/15 to ISO 4406 : 1999
4 Performance graphs
measured with oil viscosity 33 mm
2
/s (cSt)
8
40
4
25 50 250 350
12
16
75 100 150 200 300
20
24
28
32
36
8
4
25 50 250 350
12
28
75 100 150 200 300
16
20
24
32
→ Δp (bar)
→ Δp (bar)
→ Q (l/min) → Q (l/min)
Δp-Q characteristics
in cavity type EB with annular groove
(1 → 2 and 2 → 1 with p3 = 0 bar)
Δp-Q characteristics
in cavity type EB without annular groove
(1 → 2 and 2 → 1 with p3 = 0 bar)
The Δp characteristic is valid when the load pressure in the connection 1 → 2 / 2 → 1 is greater than the opening pressure.
If the load pressure is less than the opening pressure, the load pressure must first rise to overcome the opening pressure
before flow can occur.
5 Application examples
for passively controlled logic valves
Simplified symbol
Application with 4/3 directional valve
∅ 0.8
Passive control
2
1
A
P
2 bar
3
B
2
1
3
2
1
2 bar
3
2
1
3
T
∅ 0.8
∅ 0.8
∅ 0.8
2
1
3
B
P T
A
B
P
T
A
Passively controlled:
In the open condition (flow 1 → 2 / 2 → 1), there is a continuous consumption of pilot oil
400-P-160151-EN-02/02.2020
Series WL22SDUR…
3/4
6 Dimensions / schematic section
M42 x 2
5
24
19
38,5
74,5
98,5
22,5
8,5
ø 38
Model code
46 A/F hex.
for fitting the cartridge
tightening torque
MA = 200 Nm ±10 %
1
2
3
Cavity type EB
46 A/F hex.
Line-mounting body
type GEBAA
1
4
2
5
3
Area
A
3
Area
A
2
Area
A
1
3
2
1
Seal kit no. DS-359, comprising:
It. Qty. Description Size
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
4 2 Backup ring ∅ 32 x 2.0 x 1.4 FI0751
5 2 Backup ring ∅ 30 x 2.0 x 1.4 FI0751
7 Area- and pressure-relationships
3
2
1
Area A
3
Area A
2
Area A
1
A
3
: A
1
: A
2
= 2 : 1 : 1
8 Installation and servicing
All work must be carried out with care and by qualified per
sonnel only. When fitting the cartridge, ensure that the seals
are oiled or greased and use the specified tightening torque.
When changing seals, oil or grease the new seals tho
roughly before fitting them.
400-P-160151-EN-02/02.2020
Series WL22SDUR…
4/4
9 Ordering code
WL22 = 2/2 logic valve
SD = seat valve with spool seal
U = soft switching
R = passive control, soft switching
1 = orifice ∅ 0,8
2 = orifice ∅ 0,5 (standard)
3 = orifice ∅ 0,6
4 = orifice ∅ 1,4
5 = orifice ∅ 1,3
6 = orifice ∅ 1,2
7 = orifice ∅ 1,1
8 = orifice ∅ 1,0
9 = orifice ∅ 0,9
0 = orifice ∅ 0,7
2 = area ratio (main spool : seat = 2 : 1)
3 = opening pressure 2,0 bar (standard)
5 = opening pressure 6,0 bar
6 = opening pressure 10 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 mm
(blank) = Nitril seals (standard)
V = Viton seals
Special seals - consult Bucher
1 ... 9 = design number (omit when ordering new units)
-1
_
16-A2z.B. 3SDWL22 2U
Spool orifice
R
10 Related data sheets
Old no. New no.
i-32 400-P-040011-EN The form-tool hire programme
i-55.2 400-P-080111-EN Cavity type EB to ISO 7789-42-06-0-07
W-11.10 400-P-160101-EN 2/2 logic cartridge valve, series WL22SD...-16
W-11.15 400-P-160121-EN 2/2 logic cartridge valve, series WL22SDL...-16
G-29.22 400-P-750115-EN Line-mounting body, type GEBAA (G1”)
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: 450300.305.330.335