EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 B-100.A
An Eaton Brand
B
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
1 (Out)
2 (In)
PFR21H - Proportional Valve
Proportional bi-directional poppet, flow control valve
Up to 18L/min (5 USgmp) • 210 bar (3000 psi)
Description
This is a proportionally
operated 2 way poppet valve.
Ideal for use in lowering
circuits to give good control
to the operator. The valve will
compensate as the pressure
difference increases to
prevent speed increase due to
increasing load.
Operation
In the de-energised position
the valve is blocked in both
directions. As the current
to the coil is increased the
valve opens proportionally.
There is also an element of
compensation as the pressure
difference across the valve
increases. See performance
graphs.
Features
• High flow capacity with
reduced space requirements.
• Standard valve bodies and
common cavities.
• One-piece encapsulated coil
with minimal amperage draw.
• Oil immersed armature
solenoid.
.• Various coil terminals and
voltages.
• Coil interchangeability with
valves of same series.
• Manual override, seal
variations and other options
available.
• Sealed coil arrangement to
protect stem from corrosion.
• Reversible coil without
affecting performance.
Ratings and Specifications
Performance data is typical with fluid at 32 cSt (150 SSU)
Max inlet pressure 210 bar (3000 psi)
Max regulated flow at rated current @ 50 bar 20 L/min (5.3 USgpm) @100%,
15 L/min (3.9 USgpm) @85%, 11 L/min (2.9 USgpm) @75%
Frequency 200 to 400 Hz - 200 recommended
Dead band 38-60% of rated current
Response time 80ms
Internal leakage Up to 0.67 ml/min (10dpi) 210 bar differential at 32 centistrokes
Temperature range (oil) -30° to 120°C (-22° to 248°F)
Cavity A6701 (see Section M)
Electrical data See coil data sheet
Torque cartridge into cavity 30 Nm (22 lbs ft)
Mounting position Unrestricted
Fluids Most general purpose hydraulics fluids
Seal material Standard nitrile with PTFE back up rings
Filtration BS5540/4 Class 16/13 (25 micron or better)
Nominal viscosity range 15 to 250 cSt
Standard housing materials Aluminium
Coil model code C16-*-*/29
Voltage available 12, 24 VDC
Coil weight .3 kg (.6 lbs)
Weight .2 kg (.44 lbs)
Seal kit SK1138 (Nitrile) SK1138V (Viton
®
)
Viton is a registered trademark of E.I. DuPont
Performance Data
Sectional View
Pressure Drop
Viscosity = 32 cSt (150 SSU)
PFR21H @ 100%
Performance Curves
Flow - L/min
Pressure - psi
Pressure - bar
Flow - US gpm
0
300
200
100
0
21
14
7
0
2.5 7.55
0 10 3020
Flow - L/min
Flow - US gpm
10
7.5
5
2.5
0
% related amps
50
bar
210
bar
0 25 7550 100
40
30
20
10
0
Pressure differential - bar
Flow - L/min
Flow - US gpm
10
7.5
5
2.5
0
0 20001000 3000
40
30
20
10
0
0 14070 210
Pressure differential - psi
100% of
rated amps
83% of
rated amps
62% of
rated amps
2
1
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 B-101.A
An Eaton Brand
B
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
PFR21H - Proportional Valve
Proportional bi-directional poppet, flow control valve
Up to 18L/min (5 USgmp) • 210 bar (3000 psi)
Model Code
1
Function
PFR21H - Normally closed
2
Seal Material
N - Nitrile
V - Viton
3
Manual Override
6 - Screw
2
3
4 5
1
PFR21H N H6 24
Code Port Size Housing Number
Blank Cartridge only
2W 1/4" BSP A12592
3W 3/8" BSP A7450
6T 3/8" SAE A19355
6
Port Size
4
Coil Termination
H - DIN43650
F - Flying Lead
DM - Deutsch moulded
Other terminations available
on request.
5
Voltage
12 - 12 VDC
24 - 24 VDC
6
3W
Dimensions
mm (inch)
Installation
Drawing
Cartridge
Only
–
48.0 (1.89)
22.0
(0.87)
98.0
(3.86)
24 A/F
3/4”-16-UNF-2A
Ø15.8
(0.62)
26.50
(1.04)
35.50 (1.40)
M/O plate
tted by
customer
50.0
(1.97)
18.9
(0.74)
1
2
50.0 (1.97)
16.0
(0.63)
2 holes
Ø6.8 (0.27)
thro’
22.0
(0.87)
6.0
(0.24)
6.0
(0.24)
12.8
(0.53)
15.9
(0.63)
50.8
(2.00)
31.8
(1.25)
19.0
(0.75)
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