Catalog HY15-3502/US
Differential Area Unloading Relief Valve
Series RU101
PC69
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 3.75 LPM (1 GPM)
Maximum .94 LPM (.25 GPM)
Pilot Flow
Maximum Inlet 245 Bar (3500 PSI)
Pressure
Maximum 210 Bar (3000 PSI)
Pressure Setting
Maximum Tank 210 Bar (3000 PSI)
Pressure
Leakage at Port 2 to 3
150 SSU (32 cSt) 10 drops/min. (0.66 cc/min.)
Port 1 to 2
60 drops/min. (3 cc/min.)
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 .23 kg (.50 lbs.)
Cavity C10-3
(See BC Section for more details)
Form Tool Rougher NFT10-3R
Finisher NFT10-3F
Performance Curve
Inlet Flow vs. Pressure Drop
Without pilot assist (Through cartridge only)
General Description
Differential Area Unloading Relief Valve. This valve is
best suited for low flow accumulator unloading circuits
or can be used as remote pilot valves. They provide a
fixed percentage between load and unload pressures.
For additional information see Technical Tips on pages
PC1-PC6.
Features
•
Low hysteresis
•
Cartridge design
•
All external parts zinc plated
(3)
(1)
(2)
Pilot
(1)
Pressure
(2)
Tank
(3)
Flow (Q)
2.8
.75
0.9
.25
1.9
.5
LPM
GPM
0
3.8
1
Hydraulic Oil 150 SSU @ 100°F (32 cSt)
0
25
50
5.2
6.9
1.7
3.5
75
100
PSI Bar
Pressure Drop ( P)
Differential Area Unloading Relief Valve
Series RU101
Catalog HY15-3502/US
PC70
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
ReloadPressure
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
4P 1/4″ NPTF (B10-3-*4P)
6P 3/8″ NPTF (B10-3-*6P)
8P 1/2″ NPTF (B10-3-*8P)
6T SAE-6 (B10-3-*6T)
8T SAE-8 (B10-3-*8T)
6B 3/8″ BSPG (B10-3-6B)†
8B 1/2″ BSPG (B10-3-*8B)
Code Reload
C 80% ±5% of
Pressure Setting
Code Pressure Range
10 6.9 - 69 Bar (100 - 1000 PSI)
Standard Setting:
34.5 Bar (500 PSI)
@ 1.1 LPM (.3 GPM)
20 10.3 - 138 Bar (150 - 2000 PSI)
Standard Setting:
69 Bar (1000 PSI)
@ 1.1 LPM (.3 GPM)
30 13.8 - 207 Bar (200 - 3000 PSI)
Standard Setting:
103.5 Bar (1500 PSI)
@ 1.1 LPM (.3 GPM)
Code Body Material
Omit Steel
A Aluminum
Code Adjustment Style / Kit No.
F Fixed style, preset at factory.
K Knob Adjust (840208K)
S Screw Adjust
Optional Pressure Setting
Pressure ÷ 10
i.e. 235 = 2350 PSI
(Omit if standard setting is used)
Setting Range:
100 to 3000 PSI
All settings at 1.1 LPM (0.3 GPM)
RU101
10 Size
Differential Area
Unloading Relief Valve
Seals
C
Code Seals / Kit No.
Omit Nitrile / (SK10-3N)
V Fluorocarbon / (SK10-3V)
Tank (3)
59.1
(2.33)
46.5
(1.83)
Pressure
Inlet (2)
Pilot
(1)
Fixed Cap Version
7/8-14 UNC-2A
Thread
1" Hex.
22 Nm
(16 lb. ft.)
Torque
Identify Valve
Per Spec. W-39
47.2
(1.86)
57.9
(2.28)
43.2
(1.70)
Ø 15.8 (.62)
Screw/Knob Version
Ø 17.4 (.68)
