Catalog HY15-3502/US
Direct Acting Relief Valve
Series RDH042
PC7
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
General Description
Direct Acting Ball-Type Relief Valve. For additional
information see Technical Tips on pages PC1-PC6.
Features
•
Hardened, precision ground parts for durability
•
Compact size for reduced space requirements
•
Low leakage design
•
Fast response
•
All external parts zinc plated
Rated Flow 3.8 LPM (1 GPM)
Maximum Inlet 380 Bar (5500 PSI)
Pressure
Maximum 350 Bar (5000 PSI)
Pressure Setting
Maximum Tank 350 Bar (5000 PSI)
Pressure
Reseat Pressure 80% of crack pressure
Leakage at 10 drops/min. (.66 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 .03 kg (.07 lbs.)
Cavity C04-2
(See BC Section for more details)
Form Tool Rougher None
Finisher NFT04-2F
Performance Curve
Flow vs. Inlet Pressure
(Pressure rise through cartridge only)
(1)
(2)
(2)
(1)
Flow (Q)
2.8
.75
1.0
.25
1.9
.5
LPM
GPM
0
3.8
1.0
Hydraulic Oil 150 SSU @ 100°F (32 cSt)
0
1000
138
207
69
2764000
3455000
4146000
PSI Bar
2000
3000
Pressure