PLC series
Auxiliary Valves
Direct-acting Pressure Relief Valves
2
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Pressure relief valves
Catalogue HY17-8702/UK
Contents
List of contents Page
General Information ........................................................................................................3
PLC053 ...........................................................................................................................4
Single housing for PLC053 .............................................................................................5
PLC082 ...........................................................................................................................6
Single housing for PLC082 .............................................................................................7
Double housing for PLC082............................................................................................8
PLC182 ...........................................................................................................................9
PLC280 .........................................................................................................................10
Ordering .......................................................................................................................11
PLC series
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS
CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE.
This document and other information from Parker-Hannifin Corporation, its subsidiaries and authorized distributors provide
product or system options for further investigation by users having technical expertise.
The user, through its own analysis and testing, is solely responsible for making the final selection of the system and components
and assuring that all performance, endurance, maintenance, safety and warning requirements of the application are met. The
user must analyze all aspects of the application, follow applicable industry standards, and follow the information concerning
the product in the current product catalog and in any other materials provided from Parker or its subsidiaries or authorized
distributors.
To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or
specifications provided by the user, the user is responsible for determining that such data and specifications are suitable and
sufficient for all applications and reasonably foreseeable uses of the components or systems.
Offer of Sale
Please contact your Parker representation for a detailed ”Offer of Sale”.
WARNING – USER RESPONSIBILITY
Subject to alteration without prior notice. The curves and
diagrams in this catalogue are typical examples only. While the
contents of the catalogue are updated continuously, the validity
of the information given should always be confirmed. For more
detailed information, please contact Parker Hannifin.
3
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Pressure relief valves
Catalogue HY17-8702/UK
The PLC series auxiliary valves are direct-
acting, factory-set pressure relief valves of
the cartridge type that can be supplied with
or without a threaded plug. They can also
be supplied with housings to facilitate in-
line installation.
PLC valves are intended primarily to
act as combined pressure-relief and anti-
cavitation valves - otherwise known as port
relief valves - in the service ports of our
directional valves. However, they can also
be used to advantage in other situations
where pressure relief valves in this size
range are required. Indeed, PLC cartridge
valves are purchased in great quantities
by several of the world’s leading pump and
transmission manufacturers.
Construction and function
PLC pressure relief valves are made of
high-strength steel and consist of a seat,
poppet, spring and nut. After the pressure
setting has been made, the damper nut is
locked against the poppet by welding, in
order to prevent the factory-set opening
value from changing. When the cartridge is
supplied with a plug, a spring is included to
enable the cartridge to function as an anti-
cavitation valve. An anti-cavitation valve is
essentially a check valve that enables oil
to be sucked from the tank line in order to
prevent cavitation in a consumer. The plug
is fitted with an O-ring of nitrile rubber.
Poppets without a pressure relief func-
tion are also available. They are used when
only a ‘check valve’ is required to perform
an anti-cavitation function.
Technical data
Flow capacity
The flow capacities of the respective PLC
valves are dependent on the extent of
pressure increment that can be accepted,
and are illustrated in the typical graphs
that begin overleaf. The nominal flow
capacities , however, are as follows:
PLC053 50 l/min
PLC082 80 l/min
PLC182 180 l/min
PLC280 280 l/min
Pressure-setting flow
As standard, the desired pressure is set
with a flow of 20 l/min passing through the
pressure relief valve. The exception is the
PLC053, for which the pressure setting
is made with a flow of 10 l/min passing
through the valve.
Weights
PLC053 0,06 kg
PLC082 0,11 kg
PLC182 0,165 kg
PLC280 0,39 kg
The PLC valves are all supplied with a
threaded plug.
Housing for PLC082 cartridge
(inclusive of cartridge) 1,6 kg
Housing for two PLC082 cartridges
(inclusive of cartridges) 2,8 kg
Hydraulic fluids
Best performance is obtained using
mineral-base oil of high quality and clean-
ness in the hydraulic system.
Hydraulic fluids of type HLP (DIN
51524), oil for automatic gearboxes Type A
and engine oil type API CD can be used.
Synthetic, fire-resistant and environ-
mentally friendly oils can also be used. If in
doubt about the suitability of an oil, please
contact your nearest Parker representative
for advice.
For best function, oil viscosity should
be between 15 and 45 mm
2
/s (cSt).
PLC053 PLC082 PLC182 PLC280
Filtration
Filtration should be arranged so that
Target Contamination Class 20/18/14
according to ISO 4406 is not exceeded.
Temperature
Temperature range, fluid:
-20
o
C to +90
o
C
Temperature range, ambient:
-40
o
C to +60
o
C
Temperature shock resistance:
max. 100
o
C/second
General
The data given in this catalogue is appli-
cable at an oil temperature of 50
o
C and
viscosity of 30 mm
2
/s (cSt) using mineral-
base oil complying with DIN 51524, when
the cartridge valve is installed in a master
manifold.
Features and benefits
• Smalldimensions-easytoinstall
• Singleunit-facilitatesinstallation
• Verytight-nounnecessaryleakage
losses
• Goodcharacteristic–smallpressure
change between different flows
• Goodopeningandclosingcharacteris-
tics–distinctopeningandclosing
• Lowhysteresis–goodprecisionin
pressure maintenance
• Fastacting–reactsquicklytopressure
surges
• Settinglockedbywelding–prevents
undesirable changing of pressure
setting
General Information
PLC series
4
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Pressure relief valves
Catalogue HY17-8702/UK
10
50
20
60
30 40
10
0
0
20
30
R0,1-0,3
R1±0,2
2,7±0,2
0,5±0,1
(32,5±0,1)
32,5±0,1
R0,5 max
R0,6 max
R0,2 max
2,5
2,5
15°±1°
40°±1°
45°±5°
0,05 A
A
0,1
A
0,05 A
15 min
23
+0,2
-0,8
M18x1,5-6H
Ø20,3
0
-0,1
Ø13,8
+0,043
0
Ø0,1
4
4
Ø10
+0,04
-0,02
4
4
0,05
A
A
10
50
20
60
30 40
100
0
0
200
300
400
Diagram for PLC053 pressure relief valve
∆p (bar) Pressure override characteristic
q (l/min)
∆p (bar) Anti-cavitation characteristic
Seat embossed with Ø13 mm class III steel ball
Impact energy 9±2 Nm
Stated dimensions apply before embossing
Within
40 min
applies
Cavity drawing, PLC053
Machining tools can be purchased from Parker Hannifin.
Hydraulic symbol for
pressure relief valve
Anti-cavitation
valve (N)
Unless stated otherwise:
Edges broken 0.1-0.5 unless
indicated otherwise
6,3
Anti-cavitation valve (N)
Pressure relief valve
q (l/min)
T
P
PLC053 seriesTechnical Information
5
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Pressure relief valves
Catalogue HY17-8702/UK
P
T
~60
~30
~35
A
A
Y
Y
6
W
W
1
2
5
4
3
X
X
3
7
7
3
6
XXX/10
P
T
Single housing
Hydraulic symbol for single housing
Ordering
PLC053 mounted in single housing
The PLC053 mounted in a single housing can be ordered using
the ordering numbers below. Should you require a pressure
setting not listed in the table, please contact your Parker Hannifin
representative.
Pressure Ordering No
[bar]
50 3767317
63 3767318
80 3767319
100 3767320
125 3767321
140 3767322
160 3767323
175 3767324
190 3767325
210 3767326
230 3767327
240 3767328
250 3767329
260 3767330
270 3767331
280 3767332
10
20 30
100
0
0
200
300
400
Diagram for PLC053 pressure relief valve
∆p (bar) Pressure override characteristic
q (l/min)
PLC053 seriesTechnical Information
6
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Pressure relief valves
Catalogue HY17-8702/UK
Cavity drawing, PLC082
46,5 min
37±0,1
30 max
20,5 max
0,1
A
4
16 min
10±0,2
0,05
A
A
4
4
4 4
8 min
M24x1,5 - 6H
Ø30
+2
0
Ø18
+0,11
0
Ø13
+0,07
0
35°±1°
45°±5°
2,5
0,05 A
1±0,1
R0,4 max
R0,2±0,1
15°±1°
Ø25,3
0
-0,1
0,1
R1±0,2
2±0,2
A
2,5
30
25
5
15
10
20
0
0255075 100
300
500
400
100
200
0
0255075 100
Seat embossed with Ø16 mm class III steel ball
Impact energy 12±2 Nm
Stated dimensions apply before embossing
Inom
45 min
gäller
Machining tools can be purchased from Parker Hannifin.
Diagram for PLC082 pressure relief valves
∆p (bar) Pressure override characteristic
q (l/min)
∆p (bar) Anti-cavitation characteristic
Hydraulic symbol for
pressure relief valve
Unless stated otherwise:
Edges broken 0.1-0.5 unless
indicated otherwise
6,3
q (l/min)
P
T
T
P
PLC082 seriesDimensions
7
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Pressure relief valves
Catalogue HY17-8702/UK
40
18
(18)
50
60
80
10
15
38
86
75
18
P
T
Connection T, Tank*
Single housing
Hydraulic symbol for single housing
Connection P (pressure)*
SW = 12, T = 80 Nm
Mounting hole Ø11 (2x)
Connection P (pressure)*
*) Thread dimension G ½ or G ¾.
See page 11.
SW = spanner width
T = tightening torque
PLC082 seriesDimensions
8
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Pressure relief valves
Catalogue HY17-8702/UK
32
11
40
106
6421
(32)
75
48
11,5
68
56
Connection T, Tank, plugged (G 3/4)
Mounting hole
Ø11 (3x)
Connection M2, pressure (2x)*
Connection M1, pressure (2x)*
M1
TM
2
Double housing
Hydraulsymbol för dubbelhus
*) Thread dimension G ½ or G ¾.
See page 11.
SW = spanner width
T = tightening torque
SW = 12, T = 80 Nm (2x)
PLC082 seriesDimensions
9
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Pressure relief valves
Catalogue HY17-8702/UK
M24x1,5-6H
0,1
A
A
0,05
4
2,5
Ø0,2 A
Ø20
+0,084
0
0
+0,07
Ø14
19,5 min
27 max
56±0,1
**68 min
***72 min
21,5 min
0,5
A
14 min
11,5±1,5
Ø4 min
(56)1±0,2
0,05
A
2,5
35°±1°
R0,4 max alt.
R0,2±0,1 alt.
0,4x45° max
0,2±0,1x45°
0,7±0,2
45°±5°
15°±1°
2,5
R1 max
2±0,2
0,1
A
Ø25,3
0
-0,1
25 12550 15075 175100 200
10
5
15
25
0
0
20
30
25 12550 15075 175100 200
100
0
0
200
300
400
500
Seat embossed with Ø16 mm class III steel ball
Impact energy 12±2 Nm
Stated dimensions apply before embossing
** applies to Ø14 + 0.07/0
*** applies to Ø14
Cavity drawing, PLC182
Diagram for PLC182 pressure relief valves
∆p (bar) Pressure override characteristic
q (l/min)
∆p (bar) Anti-cavitation characteristic
Machining tools can be purchased from Parker Hannifin.
Hydraulic symbol for
pressure relief valve
Unless stated otherwise:
Edges broken 0.1-0.5 unless
indicated otherwise
6,3
q (l/min)
P
T
T
P
PLC082 seriesTechnical Information
10
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Pressure relief valves
Catalogue HY17-8702/UK
26,5
a) 34 max
81,5 min
77,5 min
65,5±0,1
40 max
26 max
20 min
3,2
0,1
16,5 max
60°±2°
0
9
0
+0,2
2,5
Ø0,1
A
M
B
4
Ø25H11
M33x2-6H
Ø40,2H9
Ø44,8H11
A
Ø17H10
Ø0,1
0,05
0,05
B
2,5
A
2,5
3,7
+0,2
0
2xR1±0,1
0,5±0,2x45°
3,3±0,2
R1 max
Ø35,4
+0,1
0
0,1
A
2,5
R0,2±0,1 alt.
0,2±0,1x45°
R0,6 max alt.
R0,4 max alt.
0,6x45° max
0,4x45° max
15°±1°
45°±5°
45°±1°
0,05
A
2,5
1±0,1
0,5
+1
0
(65,5)
12,8 max
Ø5 min
2,5
Ø17H10
Ø25H11
Ø40H9
Ø44,8H11
+0,070
+0,062
+0,160
+0,130
0
0
0
0
A
A
A – A
15
20
10
0
0
5
50 100 150 200 250 300 350
300
400
100
200
500
0
050 100 150 200 250 300 350
Seat embossed with Ø25 mm class II steel ball
Impact energy 18±3 Nm
Stated dimensions apply before embossing
a) For emergency operation
SW = Spanner width
T = Tightening torque
Groove for
O-ring 39.2 x 3
2x Free from burns
H=0,2 max STD 5080,341
Cavity drawing, PLC280
Diagram for PLC280 pressure relief valve
∆p (bar) Pressure override characteristic
q (l/min)
∆p (bar) Anti-cavitation characteristic
Machining tools can be purchased from Parker Hannifin.
Without drainage of spring
chamber
With drainage of spring chamber
Unless stated otherwise:
Edges broken 0.1-0.5 unless
indicated otherwise
6,3
Hydraulic symbol for
pressure relief valve
q (l/min)
P
T
SW = 34 T = 150 Nm
PLC280 seriesTechnical Information
11
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Pressure relief valves
Catalogue HY17-8702/UK
PLC-series pressure relief valves can be ordered using the
ordering numbers in the table below.
Should you require a pressure setting not listed in the table, or require
the pressure setting to be made at a flow different to standard, please
contact your Parker Hannifin representative.
Pressure PLC053 PLC082 PLC182 PLC280
[bar] with plug
40 — 9120 0291 03 9120 0292 50 —
50 393000K176 9120 0291 04 9120 0292 51 —
63 393000K177 9120 0291 05 9120 0292 52 —
80 393000K178 9120 0291 06 9120 0292 53 —
100 393000K179 9120 0291 07 9120 0292 54 —
125 393000K180 9120 0291 08 9120 0292 55 —
140 393000K181 9120 0291 09 9120 0292 56 —
160 393000K182 9120 0291 10 9120 0292 57 —
175 393000K183 9120 0291 11 9120 0292 58 —
190 393000K184 9120 0291 12 9120 0292 59 —
210 393000K185 9120 0291 13 9120 0292 60 —
230 393000K186 9120 0291 14 9120 0292 61 20006727
250 393000K187 9120 0291 15 9120 0292 62 20004981
280 393000K189 9120 0291 16 9120 0292 63 20007439
290 9120 0291 49
300 393000K190 9120 0291 17 9120 0292 64 20005798
330 393000K191 9120 0291 18 9120 0292 65 —
350 393000K192 9120 0291 19 9120 0292 66 20000990
380 393000W018 9120 0291 20 9120 0292 67 20006115
400 — 9120 0291 21 9120 0292 68 —
420 393000U020 9120 0291 22 9120 0292 69 00153491
N* 393000K194 9120099686 — —
* Anti-cavitation valve without pressure-relief function
PLC082 mounted in single housing
The PLC082 mounted in a single housing can be ordered using the
ordering numbers below. Should you require a pressure setting not
listed in the table, please contact your Parker Hannifin representative.
Pressure G1/2 G3/4
[bar]
50 3766780 3766789
125 3766781 —
160 3766782 —
175 3766783 —
190 3766784 3766903
210 3766785 3766904
230 3766786 3766862
PLC082 mounted in double housing
Pressure G1/2 G3/4
[bar]
140 3766767 —
160 3766769 3766777
175 3766770 —
190 3766771 —
210 3766772 —
230 3766773 3766900
250 — 3766901
280 — 3766873
PLC seriesOrdering
© 2012 Parker Hannin Corporation. All rights reserved. Catalogue HY17-8702/UK, POD, 11/2012, ZZ
Ed. 2012-11-01
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