Catalog HY15-3502/US
Differential Area Relief Valve
Series RDH083
PC27
Check
Valves
Shuttle
Valves
Load/Motor
Controls
Flow
Controls
Pressure
Controls
Logic
Elements
Directional
Controls
Manual
Valves
Solenoid
Valves
Proportional
Valves
Coils &
Electronics
Bodies &
Cavities
Technical
Data
SH
CV
LM
FC
PC
LE
DC
MV
SV
PV
CE
BC
TD
Parker Hannifin Corporation
Hydraulic Cartridge Systems
Technical Information
Specifications
Rated Flow 45 LPM (12 GPM)
Maximum Inlet 380 Bar (5500 PSI)
Pressure
Maximum 350 Bar (5000 PSI)
Pressure Setting
Maximum Tank 350 Bar (5000 PSI)
Pressure
Reseat Pressure 75% of crack pressure
Leakage at 10 drops/min. (.67 cc/min.)
150 SSU (32 cSt) @75% of crack pressure
Cartridge Material All parts steel. All operating
parts hardened steel.
Operating Temp. -40°C to +93.3°C (Nitrile)
Range/Seals (-40°F to +200°F)
-31.7°C to +121.1°C (Fluorocarbon)
(-25°F to +250°F)
Fluid Mineral-based or synthetic with
Compatibility/ lubricating properties at viscosities
Viscosity of 45 to 2000 SSU (6 to 420 cSt)
Filtration ISO Code 16/13,
SAE Class 4 or better
Approx. Weight .19 kg (.43 lbs.)
Cavity C08-2
(See BC Section for more details)
Form Tool Rougher None
Finisher NFT08-2F
Performance Curve
Flow vs. Inlet Pressure
(Pressure rise through cartridge only)
General Description
Differential Area Relief Valve. For additional
information see Technical Tips on pages PC1-PC6.
Features
•
Hardened, precision ground parts for durability
•
Spherical poppets for low leakage
•
High flow capacity
•
Internal mechanical stop limits poppet travel eliminating
spring solidification
•
All external parts have yellow zinc dichromate. This
coating is ideal for salt spray applications.
(1)
(2)
(1)
(2)
Flow (Q)
45
12
15
4
23
6
8
2
30
8
38
10
LPM
GPM
0
53
14
Hydraulic Oil 150 SSU @ 100°F (32 cSt)
0
1000
2000
3000
345
414
276
69
138
207
Pressure, PSI
5000
6000
PSI Bar
4000
Differential Area Relief Valve
Series RDH083
Catalog HY15-3502/US
PC28
Check
Valves
Shuttle
Valves
Load/Motor
Controls
Flow
Controls
Pressure
Controls
Logic
Elements
Directional
Controls
Manual
Valves
Proportional
Valves
Coils &
Electronics
Technical
Data
SH
CV
LM
FC
PC
LE
DC
MV
SV
PV
CE
BC
TD
Bodies &
Cavities
Solenoid
Valves
Parker Hannifin Corporation
Hydraulic Cartridge Systems
Technical Information
Dimensions
Millimeters (Inches)
Ordering Information
THIRD-ANGLE
PROJECTION
SealsPressure
Range
Adjustment
Style
Body
Material
Port
Size
Optional
Pressure
Setting
RDH083
08 Size
Differential Area
Relief Valve
* Add “A” for aluminum, omit for steel.
Code Port Size Body Part No.
Omit Cartridge Only
4P 1/4″ NPTF (B08-2-*4P)
6P 3/8″ NPTF (B08-2-*6P)
4T SAE-4 (B08-2-*4T)
6T SAE-6 (B08-2-*6T)
6B 3/8″ BSPG (B08-2-*6B)
Code Seals / Kit No.
Omit Nitrile / (SK08-2N)
V Fluorocarbon / (SK08-2V)
Code Pressure Range
15 6.9 - 103 Bar (100 - 1500 PSI)
Standard Setting:
51.7 Bar (750 PSI) @ crack pressure
approximately .95 LPM (.25 GPM)
30 69 - 207 Bar (1000 - 3000 PSI)
Standard Setting:
103 Bar (1500 PSI) @ crack pressure
approximately .95 LPM (.25 GPM)
50 138 - 345 Bar (2000 - 5000 PSI)
Standard Setting:
172.4 Bar (2500 PSI) @ crack pressure
approximately .95 LPM (.25 GPM)
Code Body Material
Omit Steel
A Aluminum
Code Adjustment Style / Kit No.
F Fixed style, preset at factory.
K Knob Adjust (717784-10)
S Screw Adjust
T Tamper Resistant Cap (718083)
Optional Pressure Setting
Pressure ÷ 10
i.e. 235 = 2350 PSI
(Omit if standard setting is used)
Setting Range:
100 to 5000 PSI
All settings at crack pressure,
approximately .95 LPM (.25 GPM)
75.3
(2.96)
27.7
(1.09)
Ø 12.7
(.50)
74.6
(2.94)
22.4 (.88) Hex.
31 N.m.
(276 In.-Lbs.)
Torque
Fixed Cap/Tamper Resistant Version
71.7
(2.82)
72.8
(2.86)
(2)
(1)
25.4 (1.00)
Dia. Knob
Screw/Knob Version
For applications over 210 Bar
(3000 PSI), Thread Lock
Compound is recommended.
*
3/4
16UNF-2A Thread
*
