Catalog HY15-3502/US
Pilot Operated Relief Valve
Series RAH161
PC41
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
Maximum Flow 302.8 LPM (80 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 5 cc per 100 PSI (6.8 Bar) setting
150 SSU (32 cSt)
Cartridge Material All parts steel. All operating
parts hardened steel.
Operating Temp. -40°C to +93.3°C (Nitrile)
Range (Ambient) (-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 0.9 kg (2.0 lbs.)
Cavity C16-2
(See BC Section for more details)
Form Tool Rougher None
Finisher NFT16-2F
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)
Pressure
(1)
Tank
(2)
Hydraulic Oil 150 SSU @ 100°F (32 cSt)
Flow (Q)
151.6
40
75.8
20
LPM
GPM
0
227.4
60
303.2
80
0
1000
2000
345
414
207
276
69
138
5000
6000
PSI Bar
3000
4000
Pressure
Pilot Operated Relief Valve
Series RAH161
Catalog HY15-3502/US
PC42
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
THIRD-ANGLE
PROJECTION
Ordering Information
Dimensions
Millimeters (Inches)
SealsPressure
Range
Adjustment
Style
Body
Material
Port
Size
Optional
Pressure
Setting
* Add “A” for aluminum, omit for steel.
† Steel body only.
Code Port Size Body Part No.
Omit Cartridge Only
12P 3/4″ NPTF (B16-2-*12P)
16P 1″ NPTF (B16-2-*16P)
8T SAE-8 (B16-2-*8T)
12T SAE-12 (B16-2-*12T)
16T SAE-16 (B16-2-*16T)
12B 3/4″ BSPG (B16-2-12B)†
16B 1″ BSPG (B16-2-*16B)
Code Seals / Kit No.
Omit Nitrile / (SK16-2)
V Fluorocarbon / (SK16-2V)
Code Pressure Range
10 6.9 - 69 Bar (100 - 1000 PSI)
Standard Setting:
34.5 Bar (500 PSI)
@ 37.5 LPM (10 GPM)
20 13.8 - 138 Bar (200 - 2000 PSI)
Standard Setting:
69 Bar (1000 PSI)
@ 37.5 LPM (10 GPM)
30 20.7 - 207 Bar (300 - 3000 PSI)
Standard Setting:
103.5 Bar (1500 PSI)
@ 37.5 LPM (10 GPM)
50 34.5 - 345 Bar (500 - 5000 PSI)
Standard Setting:
172.4 Bar (2500 PSI)
@ 37.5 LPM (10 GPM)
Code Body Material
Omit Steel
A Aluminum
Code Adjustment Style / Kit No.
F Fixed style, preset at factory.
K Knob Adjust (717784-15)
S Screw Adjust
T Tamper Resistant Cap (717785)
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 37.5 LPM (10 GPM)
RAH161
16 Size
Pilot Operated
Relief Valve
Fixed Cap/Tamper Resistant Version
38.8
(1.53)
Ø 28.5
(1.12)
39.5
(1.55)
1-1/2" Hex.
76 Nm
(56 lb. ft.)
Torque
38.1 (1.50)
Dia. Knob
36.9
(1.45)
Pressure
(1)
Tank
(2)
44.5
(1.75)
36.4
(1.43)
1-5/16-12 UN-2A
Thread
Screw/Knob Version
