PL..M
Pressure compensator priority
on demand valves
PL..M
Pressure compensator priority
on demand valves
DESCRIPTION:
Walvoil has launched the new PL cartridge valve series, with priority on demand and
pressure compensator with static or dynamic load sense.
An external orice denes the ow to the valve and it provides the prioritary ow on
demand, regardless of pressure, while the exceeding ow can be used for auxiliary
functions.
The PL valve series is available in SAE 10, 12 & 16 size and dierent pressure ranges; it can
be used to supply steering control units and have the required ow for additional auxiliary
functions.
OPERATION:
In neutral position all input ow at port 3 is sent to the priority port 4 and exceeding ow is
sent to the port 2 to supply the auxiliary function. When the function at port 2 requires the
ows, the priority ow is supplied before any other function in the system.
The ow on port 4 is not subject to variation and remains constant under all working
conditions, even if ports 4 and 2 are at dierent pressure level.
Working condition
PL10M PL12M PL16M
Nominal ow
port 3
50 l/min
(13.2 US gpm)
100 l/min
(26.4 US gpm)
160 l/min
(42.2 US gpm)
max. on port 4
40 l/min
(10.5 US gpm)
80 l/min
(21.1 US gpm)
140 l/min
(36.9 US gpm)
Max. pressure
350 bar
(5100 psi)
Stand-by
PL..M/..AB
5 bar
(72.5 psi) 5 bar (72.5 psi) 5.5 bar (79.7 psi)
PL..M/..BB
10 bar
(145 psi) 7.5 bar (108 psi)
11 bar (159 psi)
PL..M/..CB -
10 bar
(145 psi) 22 bar (319 psi)
Fluid mineral based oil
Viscosity 10-200 cSt
Max level of
contamination
18/16/13 ISO4406
Fluid temperature
with NBR seals
from -20°C
(-4°F) to 80°C (176°F)
with FPM seals
from -20°C
(-4°F) to 100°C (212°F)
Environmental temp.
for working conditions
from -20°C
(-4°F) to 60°C (140°F)
Cavity SAE 10/4 SAE 12/4 SAE 16/4
Note - For dierent conditions, please contact Walvoil Sales Department.
□ Priority on-demand
□ Static and dynamic load sense
□ Priority ow rate independent
from the load
□ Zinc-plated and corrosion-proof
external components
□ Hardened parts to ensure
minimal wear and long life
□ Spool prole optimized through
CFD analysis
□ Industry common cavities
□ Heavy duty polyurethane seals
Technical specications and diagrams are measured with mineral oil of 46 cSt viscosity at
40°C (104°F) temperature.
Dimensions and hydraulic circuits
____________________________________________________________________
27
50 Nm
(
36.8 lbft)
32
80 Nm
(
59 lbft)
36
100 Nm
(
73.7 lbft)
1
2
3
4
PL12M valve
1”1/16-12 UNF
(SAE12)
35
1.37
81.9
3.22
116.9
4.60
1
2
3
4
PL10M valve
7/8-14 UNF
(SAE10)
32.8
1.29
62.4
2.45
95.2
3.74
1
2
3
4
PL16M valve
Static circuitDynamic circuit
1”5/16-12 UNF
(SAE16)
37.6
1.48
102.5
4.03
140.1
5.51
CF
P
EF
1
2
3
4
G2
LS
G1
VERSIONE DINAMICA
CF
P
EF
1
2
3
4
LS
G1
VERSIONE STATICA
Walvoil S.P.A. • 42124 Reggio Emilia • Italy • Via Adige, 13/D • Tel. +39.0522.932411 • Fax +39.0522.300984
www.walvoil.com
D1WWCI03E - 1
nd
edition October 2021
Performance data
_________________________________________________________________________________________
PL10M
Pressure drop vs. ow
PL10M
Priority ow vs. Load
(inlet ow 45 l/min -
11.8 US gpm)
PL12M
Priority ow vs. Load
(inlet ow 100 l/min - 26.4 US gpm)
(US gpm)0 2.50
2.50
5
5
7.50
7.50
10
10
12.5
12.5
(psi)
(US gpm)
0
20002000 40004000 0
5
10
15
20
25
(psi)
(US gpm)
0
20002000 40004000 0
(psi)
0
(psi)
105
210
315
420
pressure drop vs flow
(bar)
(l/min)
3->2
0
0
0 10
10
20
30
40
50
20 30 40 50
5
10
15
20
25
30
Priority flow vs load 45 lpm
PL10M
(bar)
(l/min)
0100 100200 200300 300
0
20
40
60
80
100
Priority flow vs load 100 lpm
PL12M
(bar)
(l/min)
0100 100200 200300 300
Flow
Pressure
Flow
Pressure
Flow
Pressure
(US gpm)0 2.50
2.50
5
5
7.50
7.50
10
10
12.5
12.5
(psi)
(US gpm)
0
20002000 40004000 0
5
10
15
20
25
(psi)
(US gpm)
0
20002000 40004000 0
(psi)
0
(psi)
105
210
315
420
pressure drop vs flow
(bar)
(l/min)
3->2
0
0
0 10
10
20
30
40
50
20 30 40 50
5
10
15
20
25
30
Priority flow vs load 45 lpm
PL10M
(bar)
(l/min)
0100 100200 200300 300
0
20
40
60
80
100
Priority flow vs load 100 lpm
PL12M
(bar)
(l/min)
0100 100200 200300 300
Flow
Pressure
Flow
Pressure
Flow
Pressure
(US gpm)0 2.50
2.50
5
5
7.50
7.50
10
10
12.5
12.5
(psi)
(US gpm)
0
20002000 40004000 0
5
10
15
20
25
(psi)
(US gpm)
0
20002000 40004000 0
(psi)
0
(psi)
105
210
315
420
pressure drop vs flow
(bar)
(l/min)
3->2
0 0
0 10
10
20
30
40
50
20 30 40 50
5
10
15
20
25
30
Priority flow vs load 45 lpm
PL10M
(bar)
(l/min)
0100 100200 200300 300
0
20
40
60
80
100
Priority flow vs load 100 lpm
PL12M
(bar)
(l/min)
0100 100200 200300 300
Flow
Pressure
Flow
Pressure
Flow
Pressure