EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 B-270.A
An Eaton Brand
B
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
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PDR21A - Proportional Valve
Proportional relief
1.5 L/min (.3 USgpm) • 350 bar (5000 psi)
Description
This is a proportional poppet
style pilot relief cartridge. The
pressure setting is directly
proportional to changes in DC
current input. The valve is ideal
for the control of larger valves
for the control of a pressure
within a system.
Operation
The poppet is held on the
seat by a light spring. The
force is increased by the
application of magnetic force
due to the increase in current.
This increases the pressure
required to lift the poppet of
the seat thus controlling the
pressure.
Features
• High flow capacity with
reduced space requirements.
• No dynamic seals.
• 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.
Ratings and Specifications
Performance data is typical with fluid at 21,8 cST (105 SUS) and 49°C (120°F)
Max inlet pressure 350 bar (5000 psi)
Pressure range 10 = 5-107 bar (72-1550 psi), 20 = 14-220 bar (200-3200 psi),
35 = 22-350 bar (320-5000 psi)
Max press port 2 100 bar (1450 psi)
Max flow 1.5 L/min (.3 US GPM)
Hystersis <12.5% without PWM
Dead band 10% approx
Response time 10 = 2-193 ms, 20 = 3-395 ms, 35 = 2-358 ms
Internal leakage <5 ml/min
Temperature range -30° to 120°C (-22° to 248°F)
Cavity A879 (see Section M)
Electrical data See coil data sheet
Torque cartridge into cavity 40 Nm (29.5 lbs ft)
Mounting position For best results mount below reservoir oil level.
If this is not feasible mount horizontally
Fluids All general purpose hydraulics fluids such as: MIL-H-5606, SAE 10, SAE 20, etc
Seal material Standard nitrile with PTFE back up rings
Filtration BS5540/4 Class 18/13 (25 micron or better)
Nominal viscosity range 15 to 250 cSt
Standard housing materials Aluminium
Coil Model Code C16-*-*/19
Coil Weight .3 kg (.6 lbs)
Weight .25 kg (.55 lbs)
Voltage available 12/24 VDC
Seal kit SK1119 (Nitrile) SK1119V (Viton
®
)
Viton is a registered trademark of E.I. DuPont
Performance Data
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2
Sectional View
Performance Curves
Flow - L/min
Pressure - psi
Pressure - bar
Flow - US gpm
0
200
150
100
50
0
22-350 bar
14-220 bar
5-107 bar
0.40.30.20.1
0 1.51.10.750.4
14
10
7
3.5
0
% of rated current
Pressure - psi
Pressure - bar
0
5-107
bar
22-220
bar
22-350
bar
5000
4000
3000
2000
1000
0
350
280
210
140
70
0
20
40 60 80
100
Flow - L/min
Pressure - psi
Pressure - bar
Flow - US gpm
0
5000
4000
3000
2000
1000
0
22-350 bar
14-220 bar
5-107 bar
0.40.30.20.1
0 1.51.10.750.4
350
280
210
140
70
0
25%
25%
25%
50%
50%
50%
75%
75%
EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 B-271.A
An Eaton Brand
B
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
PDR21A - Proportional Valve
Proportional relief
1.5 L/min (.3 USgpm) • 350 bar (5000 psi)
Model Code
1
Function
PDR21A - Normally open
2
Seal Material
N - Nitrile
V - Viton
3
Pressure Range
10 - 5 to 120 bar
20 - 10 to 240 bar
4
Manual Override
6 - Screw
2 3 41
PDR21A N 20 6
7
3W
Code Port Size Housing Number
Aluminium Steel
0 Cartridge only
2W 1/4" BSP A1485 A14128
3W 3/8" BSP A1043 A14175
4T 1/4" SAE A14842 -
6T 3/8" SAE A15676 A14843
7
Port Size
5
Coil Termination
H - DIN43650
F - Flying Lead
DM - Deutsch moulded
Other terminations available
on request.
6
Voltage
12 - 12 VDC
24 - 24 VDC
6
24
5
H
– –––––
Dimensions
mm (inch)
Installation DrawingCartridge Only
T(2)
P(1)
50.00
(1.97)
24.0 A/F
49.00 (1.90)
35.50
(1.40)
21.00
(0.82)
101.00
(3.98)
29.00
(1.14)
Ø12.60
(0.50)
19.40
(0.76)
5.00 A/F
Man override
10.00 A/F
Man override
locknut
3/4”-16 UNF
50.0 (1.97)
44.0 (1.73)
31.0 (1.22)
16.0 (0.63)
50.8
(2.00)
44.8
(1.76)
12.7
(0.50)
28.8
(1.13)
2 holes
Ø6.8 (0.27) through
15.9
(0.63)
31.8
(1.25)
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