2/2 Logic Cartridge Valve, Size 16
Q
max
= 350l/min,p
max
= 420bar
Passive Control,Seated Design
Series WL22SDL…
1/4
Reference: 400-P-160121-EN-02
Issue: 05.2022
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 external parts are chromited and
are Cr VI-free
S Can be fitted in a line-mounting body
1 Description
Series WL22SDL...-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. All external parts of the cartridge are zinc-nickel
plated according to DIN EN ISO 19 598 and are thus suit-
able for use in the harshest operating environments. For
self-assembly, please refer to the section related data
sheets.
2 Symbol
2
1
3
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
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
400-P-160121-EN-02/05.2022
Series WL22SDL…
2/4
4 Performance graphs
measured with oil viscosity 33 mm
2
/s (cSt)
6
8
18
4
25 50 250 350
2
10
12
14
16
75 100 150 200 300
6
8
24
4
25 50 250 350
2
10
12
14
16
75 100 150 200 300
18
20
22
→ 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-160121-EN-02/05.2022
Series WL22SDL…
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-160121-EN-02/05.2022
Series WL22SDL…
4/4
9 Ordering code
_
WL22 = 2/2 logic cartridge valve
SD = seat valve with spool seal
L = passive control, no spool nose
1 = orifice Ø 0.8
2 = orifice Ø 0.5 (standard)
3 = orifice Ø 0.6
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)
D1 = orifice Ø 0.8
D3 = orifice Ø 1.5
D4 = orifice Ø 1.4
D5 = orifice Ø 1.3
D6 = orifice Ø 1.2 optional orifice in port 3 (type G / M3)
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)
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) = Nitrile seals (standard)
V = Viton seals
(special seals − please consult Bucher)
1 ... 9 = design number (omit when ordering new units)
16−A
Ex.
_
WL22 3D12SD L 2 −
optional orifice in valve spool* (Typ G / M5)
* Orifice in valve spool has to be at least 30% smaller than orifice in port ”3”.
10 Related data sheets
New no.
400-P-040011 The form-tool hire programme
400-P-080111 Cavity type EB to ISO 7789-42-06-0-07
400-P-160101 2/2 logic cartridge valve, series WL22SD...-16
400-P-160151 2/2 logic cartridge valve, series WL22SDUR...-16
400-P-750115 Line-mounting body, type GEBAA (G1”)
www.bucherhydraulics.cominfo.ch@bucherhydraulics.com
Classification: 4300.-.305.330.335
E 2022 by Bucher Hydraulics AG Frutigen, CH-3714 Frutigen
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.