B
B
B62
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog MSG14-2500/US
General Description
Series PRM reducing valves are used to regulate
pressure in one area of a circuit below normal system
pressure. This style valve is well suited to perform this
function as it mounts directly below the directional
control valve.
Operation
These are "normally open" valves that allow ļ¬uid to
pass through the controlled port during typical opera-
tion. When downstream pressure rises above the
value set by an adjustable spring force, the control
pilot opens and allows the main spool to move from
a full open position. The main spool modulates to
maintain the desired "reduced pressure" downstream
of the valve. The PRM3 also has a relieving mode.
Features
ā¢
PRM sandwich style pressure reducing valves allow for
easy conļ¬guration of stack systems and can be used
to reduce pressure on the 'P' port, the 'A' port, or the 'B'
port.
ā¢
Four pressure adjustment options are available: slotted
screw, hexagon socket screw (PRM4), knob and locking
knob. (PRM6 only)
ā¢
Valve bodies are manufactured from steel which provide
extra strength and durability for longer life. Internal hard-
ened steel components also provide longer life.
Technical Information Series PRM
WARNING: This product can expose you to chemicals including Lead, Nickel (Metallic), or 1,3-Butadiene which are known to the State of California to
cause cancer, and Lead or 1,3-Butadiene which is known to the State of California to cause birth defects and other reproductive harm. For more information
go to www.P65Warnings.ca.gov.
Speciļ¬cations
PRM3 PRM4 PRM6
Mounting
Pattern
NFPA D05,
CETOP 5, NG 10
CETOP 07, NG 16
NFPA D08,
CETOP 8, NG 25
Minimum
Pressure
10 Bar (150 PSI) with rated ļ¬ow, 150 SSU oil, and ļ¬uid
temperature of 38Ā°C (100Ā°F).
1
Maximum
Pressure
345 Bar
(5000 PSI)
345 Bar
(5000 PSI)
345 Bar
(5000 PSI)
Minimum
Flow
3.78 LPM
(1 GPM)
3.78 LPM
(1 GPM)
Maximum
Flow
64 LPM
(17 GPM)
189 LPM
(50 GPM)
Pressure
Range
Code
07
17
25
35
Pressure Range
10 to 70 Bar (150 - 1000 PSI)
10 to 175 Bar (150-2500 PSI)
10 to 250 Bar (150 - 3500 PSI)
10 to 350 Bar (150 - 5000 PSI)
PRM3 / PRM4 / PRM6
Filtration
ISO 4406 (1999); 18/16/13 (meet NAS
1638:7)
Venting
Connecting the vent port to tank
allows the reducing valve to divert ļ¬ow
at minimum pressure.
Remote
Control
Remote control valve connected to the
vent port can be used to control the
pressure.
2
Drain
Line
Drain line from pilot valve is internally
connected to the tank port. Tank line
pressure is thus added to the valve
setting.
3
1
Change in ļ¬ow, temperature or ļ¬uid (SSU) rating will
affect valve minimum pressure.
2
Set main valve pressure 10 Bar (150 PSI) higher than
remote pilot.
3
It is important that the drain line connection be taken
into consideration when determining the minimum valve
setting.
B
B
B63
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog MSG14-2500/US
Code Description
3 NFPA D05
4 NFPA D07
6 NFPA D08
Code Description
07 10 to 70 Bar (150 to 1000 PSI)
17* 10 to 175 Bar (150 to 2500 PSI)
25 10 to 250 Bar (150 to 3500 PSI)
35** 10 to 345 Bar (150 to 5000 PSI)
* PRM3 and PRM6. ** PRM3 and PRM4.
Code Type
Omit* SAE
S** SAE
N** NPT
M** Metric
Gā 1/4 BSPP
* PRM4 only.
** PRM3 only.
ā PMR6 only.
Code Type
K* Turning Knob
L** Cylinder Lock
Sā Screw Adj.
* PRM3 and PRM6 only.
** PRM6 only.
ā PRM3 and PRM4 only.
Code Type
N* Nitrile
V Fluorocarbon
* PRM3 only.
Unit Weight:
PRM3 3.0 kg (6.6 lbs.)
PRM4 5.0 kg (11.0 lbs.)
PRM6 5.6 kg (12.5 lbs.)
Schematics
PA Option AP Option
AA Option
āAā Port Reduced
BB Option
āBā Port Reduced
PP Option
āPā Port Reduced
VALVE SIDE
SUBPLATE SIDE SUBPLATE SIDE SUBPLATE SIDE
VALVE SIDE VALVE SIDE
PRM4
PRM6
PRM3
Design
Series
NOTE:
Not required
when ordering.
PRM
Pressure
Reducing
Valve
Size
Pressure
Reducing
Pressure
Range
Adjustment
Seal
*
Gauge Port Drain
Code Type
Omit Internal
Y* External
* PRM3 only.
Bold: Designates Tier I products and options.
Non-Bold: Designates Tier II products and options.
These products will have longer lead times.
Ordering Information Series PRM
Code Description
Available Models
PRM3 PRM4 PRM6
AA
A Port Only ā
AP Connection A
ā
BB
B Port Only ā
PA Connection P
ā
PA
Function in P,
Reduced Pressure in A
ā
PB
Function in P,
Reduced Pressure in B
ā
PP P Port Only
ā
PP
Function in P,
Reduced Pressure in P
ā
Size 6
No. of Sandwich D3W-30 Bolt
Sand- & Valve D3DW & Length
wich Combination D31*W* mm (in)
1 Sandwich & D6 BK121 133.4 (5.25)
2 Sandwich & D6 BK122 203.2 (8.00)
3 Sandwich & D6 BK123 273.1 (10.75)
4 Sandwich & D6 BK124 342.9 (13.5)
Bolt Kits
Size 3
No. of Sandwich D3W-30 Bolt
Sand- & Valve D3DW & Length
wich Combination D31*W* mm (in)
1 Sandwich & D3 BK141 88.9 (3.50)
2 Sandwich & D3 BK142 139.7 (5.50)
3 Sandwich & D3 BK143 190.5 (7.50)
Bolt Kits must be ordered separately.
* D31VW with internal pilot and
internal drain only.
Size 4
No. of Sandwich Bolt
Sand- & Valve Length
wich Combination mm
1 Sandwich & D4
4x M10 x 140
2x M6 x 135
2 Sandwich & D4
4x M10 x 220
2x M6 x 215
3 Sandwich & D4
4x M10 x 300
2x M10 x 295
Bolt Kits must be ordered separately.
B
B
B64
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog MSG14-2500/US
NOTE: Lowest pressure setting dependent upon system resistance.
Mode Flow Path
P ā P A ā A B ā B T ā T
PP 1 2 3 4
AA 1 2 3 5
BB 1 2 3 5
Viscosity Correction Factor
Viscosity (SSU) 75 150 200 250 300 350 400
% of āP (approx.) 93 111 119 126 132 137 141
Curves were generated using 100 SSU hydraulic oil.
For any other viscosity, pressure drop will change per chart.
Minimum
Setting
20
10
20
38
75
75
38
30
0
113
0
1000
100
3000
200
4000
5000
PSI
250
Bar
Pressure Drop
LPM
GPM
Flow Rate
RELIEVING
300
150
50
2000
Valve will not function in this region
10 0
REDUCING
Performance Curves Series PRM
All characteristic curves measured with HLP46 at 50Ā°C (122Ā°F).
B
B
B65
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog MSG14-2500/US
Dimensions Series PRM3
PRM3AA
Inch equivalents for millimeter dimensions are shown in (**)
B
B
B66
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog MSG14-2500/US
Dimensions Series PRM3
PRM3BB
Inch equivalents for millimeter dimensions are shown in (**)
B
B
B67
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog MSG14-2500/US
Dimensions
PRM3PP
Inch equivalents for millimeter dimensions are shown in (**)
Series PRM3
B
B
B68
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog MSG14-2500/US
Dimensions Series PRM4
PRM4
Inch equivalents for millimeter dimensions are shown in (**)
Top View
Face View
B
B
B69
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog MSG14-2500/US
Dimensions
Top View
Bottom View
Face View
End View
Series PRM6
PRM6
Inch equivalents for millimeter dimensions are shown in (**)
