PC39
Parker Hannifin Corporation
Hydraulic Cartridge Systems
Catalog HY15-3502/US
Pilot Operated Relief Valve
Series RAH121
Check
Valves
Shuttle
Valves
Load/Motor
Controls
Flow
Controls
Pressure
Controls
Logic
Elements
Directional
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Cavities
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Data
SH
CV
LM
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TD
Specifications
Technical Information
Rated Flow 189.5 LPM (50 GPM)
Maximum Inlet 380 Bar (5500 PSI)
Pressure
Maximum 350 Bar (5000 PSI)
Pressure Setting
Reseat Pressure 80% of crack pressure
Leakage at 82 cc/min. (5 cu. in./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 .22 kg (.48 lbs.)
Cavity C12-2
Form Tool Rougher None
Finisher NFT12-2F
Performance Curve
Flow vs. Inlet Pressure
(Pressure rise through cartridge only)
General Description
Pilot Operated Spool-Type Relief Valve. For additional
information see Technical Tips on pages PC1-PC6.
Features
•
Low override curve
•
Ball-type pilot for added stability
•
High accuracy - pilot operated design
•
Hardened, precision ground parts for durability
•
Compact size for reduced space requirements
•
All external parts have yellow zinc dichromate. This
coating is ideal for salt spray applications.
Out
(2)
In
(1)
In
(1)
Out
(2)
Flow (Q)
113.7
30
37.9
10
75.8
20
LPM
GPM
0
151.6
40
189.5
50
Hydraulic Oil 150 SSU @ 100°F (32 cSt)
0
1000
2000
345
414
207
276
69
138
5000
6000
PSI Bar
3000
4000
Pressure