Parker Sandwich.indd, dd
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog HY14-2500/US
B36
B
B
Technical Information Series RM
General Description
Series RM relief valves limit system pressure by
opening to tank when system pressure reaches the
valve setting. With D03 size, they can also be conļ¬g-
ured to limit the 'A' or 'B' work port pressures indepen-
dently.
Features
ā€¢
RM sandwich style relief valves can be used to limit pres-
sure in the 'P' port, 'A' port, or 'B' port.
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.
ā€¢
Three pressure adjustment options are available: slotted
screw, knob and locking knob.
ā€¢
SAE Gage Port
Speciļ¬cations
RM2 RM3 RM6
Mounting NFPA D03, NFPA D05, NFPA D08,
Pattern CETOP 3, CETOP 5, CETOP 8,
NG 6 NG 10 NG 25
Minimum 10 Bar (150 PSI) with rated ļ¬‚ow, 150 SSU
Pressure oil, and ļ¬‚uid temperature of 38Ā°C (100Ā°F).
1
Maximum 350 Bar 350 Bar 350 Bar
Pressure (5000 PSI) (5000 PSI) (5000 PSI)
Minimum 3.78 LPM 3.78 LPM 3.78 LPM
Flow (1 GPM) (1 GPM) (1 GPM)
Maximum 53 LPM 76 LPM 341 LPM
Flow (14 GPM) (20 GPM) (90 GPM)
Pressure
Code Pressure Range
Range 07 10 to 70 Bar (150 - 1000 PSI)
17 10 to 175 Bar (150 - 2500 PSI)
25 10 to 250 Bar (150 - 3500 PSI)
35 10 to 350 Bar (150 - 5000 PSI)
Filtration ISO 4406 (1999); 18/16/13
(meet NAS 1638:7)
Venting Connecting the vent port to tank allows
the relief valve to divert ļ¬‚ow at minimum
pressure.
2
Remote Remote control valve connected to the vent
Control port can be used to control the pressure.
3
1
Change in ļ¬‚ow, temperature or ļ¬‚uid (SSU) rating will affect valve
minimum pressure.
2
Not available on Model RM2.
3
Set main valve pressure 10 Bar (150 PSI) higher than remote
pilot.
Performance Curves
0
0
18.9
5
68
136
1000
2000
2053000
2734000
341
Bar
5000
PSI
37.9
10
56.8
15
LPM
GPM
Flow
Pressure
RM2 Override Characteristics
35 spring
25 spring
17 spring
07 spring
Min setting
VISCOSITY CORRECTION FACTOR
Viscosity (SSU) 75 150 200 250 300 350 400
% of āˆ†P (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.
Parker Sandwich.indd, dd
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog HY14-2500/US
B37
B
B
Series RMOrdering Information
Code Description
2 NFPA D03
Subplate Mounting
3 NFPA D05
Subplate Mounting
6 NFPA D08
Subplate Mounting
Schematics
AT Option BT Option PT Option
Code Type
K Knob
L Locking Knob
S Slotted Screw
with Jam Nut
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 350 Bar (150 to 5000 PSI)
Code Description
PT Relief P to T
AT* Relief A to T
BT* Relief B to T
* RM2 only.
Bolt Kits
Size "2"
Sandwich
No. of & Valve Bolt Bolt Length
Sandwich Combination Kit mm (in)
1 Sandwich & D1 BK243 73.2 (2.88)
2 Sandwich & D1 BK225 111.3 (4.38)
3 Sandwich & D1 BK244 152.4 (6.00)
4 Sandwich & D1 BK245 190.5 (7.50)
Size "3"
Sandwich D3W-30
No. of & Valve D3DW & Bolt Length
Sandwich 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)
Unit Weight:
RM2 .95 kg (2.1 lbs.)
RM3 3.0 kg (6.6 lbs.)
RM6 5.9 kg (13.0 lbs.)
Design
Series
NOTE:
Not required
when ordering.
RM
Relief Valve Size Port
Option
Pressure
Range
Adjustment Seal
*
Size "6"
No. of Sandwich & Valve Bolt Bolt Length
Sandwich Combination Kit 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 must be ordered separately.
* D31VW with internal pilot and internal drain only.
Bold: Designates Tier I products and options.
Non-Bold: Designates Tier II products and options. These products will have longer lead times.
Code Type
N Nitrile
V Fluorocarbon
Parker Sandwich.indd, dd
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog HY14-2500/US
B38
B
B
Performance Curves Series RM
0
0
18.9
5
68
136
1000
2000
2053000
BarPSI
37.9
10
56.8
15
75.7
20
LPM
GPM
Flow
Pressure
RM3 Override Characteristics
17 spring
25 spring
07 spring
Min setting
0
0
95
25
68
136
1000
2000
2053000
BarPSI
189
50
284
75
379
100
LPM
GPM
Flow
Pressure
RM6 Override Characteristics
17 spring
25 spring
07 spring
Min setting
0
0
18.9
5
1.4
.7
2.7
2.1
20
10
40
30
4.1
4.8
3.4
60
70
50
BarPSI
37.9
10
56.8
15
LPM
GPM
Flow
Pressure
RM3 Vent Flow
RM6 Vent Press vs. Flow
0
0
25
25
3.4
6.8
50
100
10.2150
BarPSI
189
50
284
75
379
100
LPM
GPM
Flow
Pressure
VISCOSITY CORRECTION FACTOR
Viscosity (SSU) 75 150 200 250 300 350 400
% of āˆ†P (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.
Parker Sandwich.indd, dd
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog HY14-2500/US
B39
B
B
Series RM2Dimensions
Inch equivalents for millimeter dimensions are shown in (**)
Top View
Bottom View
Face View
End View
169.4
(6.49)
9.0
(0.35)
T
A
B
P
7.0
(0.28)
3.5
(0.14)
41.4
(1.63)
@Low Pressure
34.8
(1.37)
PT Body Shown
Gage Port Location
Varies from AT Body
and BT Body
3.2
(0.13)
ī€Ÿ3.2
(0.13)
128.0
(5.04)
170.3 (6.70) @ Max. Pressure
177.0 (6.97) @ Low Pressure
40.0
(1.57)
45.0
(1.77)
Pilot Cartridge Is Located
On The Right Side
For PT Body And BT Body
88.0
(3.46)
45.2 (1.78)
Needed for
key removal
26.2
(1.31)
P
A
B
T
SAE 4
@Max. Pressure
Parker Sandwich.indd, dd
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog HY14-2500/US
B40
B
B
Dimensions Series RM3
Inch equivalents for millimeter dimensions are shown in (**)
End View
Top View
Face View
Bottom View
Back View
@ Low Pressure
@ Max.
Pressure
T
B
A
T
P
186.6
(7.35)
72.2
(2.84)
11.9
(0.47)
15.9
(0.63)
50.0
(1.97)
145.3
(5.71)
26.2
(1.31)
88.0
(3.46)
93.7
(3.69)
19.8
(0.78)
45.2 (1.78)
Needed for
key removal
187.6 (7.39) @Max. Pressure
194.2 (7.65) @Low Pressure
27.8
(1.09)
21.4
(0.84)
45.6
(1.80)
69.9
(2.75)
41.4
(1.63)
34.8
(1.37)
VENT
GAGE
SAE 4
Parker Sandwich.indd, dd
Parker Hanniļ¬n Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Sandwich Valves
Catalog HY14-2500/US
B41
B
B
Dimensions Series RM6
Inch equivalents for millimeter dimensions are shown in (**)
End View
Bottom View
Top View
Face View