DESCRIPTION
A pressure-compensated electrically-variable two-port fl ow regulator that is normally
closed when de-energized. This combination valve uses a PV72-33x proportional
cartridge and an EC12-30 compensator.
OPERATION
This proportional valve/compensator package will regulate fl ow out of port ➁
regardless of system working pressure. With an increasing current applied to the
solenoid, the PFR72-33x-L will increase output fl ow.
FEATURES
• Excellent linearity and hysteresis.
• Optional control orifi ce sizes.
• Hardened spool and cage for long life.
• Optional coil voltages and terminations.
• Effi cient wet armature construction.
RATINGS
Operating Pressure: 207 bar (3000 psi)
Internal Leakage: 492 cc/min. (30 cu. in./min.) fully closed at 207 bar (3000 psi) out
port
➁.
Electrical: 2 standard voltage ratings
2.408.1
USASI:
SYMBOLS
ISO:
PFR72-33x-L Proportional Flow Regulator, N.C.,
Max. Control
Current (mA)
1500 ± 100 mA
750 ± 100 mA
Coil Voltage
12 VDC
24 VDC
Operation of Manual Override:
To Engage: Turn clockwise approximately 1 turn to reach start point. Continue
another approximately 5 turns to full shift.
To Disengage: Turn counterclockwise approximately 6 turns until positive stop
is found.
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
PERFORMANCE CURVES Regulated Flow Delivered Out Port ➁:
24 Volt coil used; 100 Hz dither; PWM controller. For 12 volt coils, double the current (amp) values shown.
75.8/20
CURRENT amp
FLOW lpm/gpm
Flow vs. Current (207 bar/3000 psi Load)
PV72-33A with EC12-30
11 bar/160 psi spring ——
6.9 bar/100 psi spring - - - -
100 Hz Dither
.1
68.1/18
45.4/12
37.9/10
22.7/6
7.5/2
15.1/4
30.2/8
53.0/14
60.6/16
.2 .3 .4 .5 .6 .7 .8 .9 1.0
75.8/20
CURRENT amp
FLOW lpm/gpm
Flow vs. Current (207 bar/3000 psi Load)
PV72-33B with EC12-30
11 bar/160 psi spring ——
6.9 bar/100 psi spring - - - -
100 Hz Dither
.1
68.1/18
45.4/12
37.9/10
22.7/6
7.5/2
15.1/4
30.2/8
53.0/14
60.6/16
.2 .3 .4 .5 .6 .7 .8 .9 1.0
Attention Manifold Designers:
To obtain these high fl ow capabilities
using proportional fl ow controls and
compensators, optimized cavity drillings
are required. Please consult factory.
ELECTRO-PROPORTIONAL VALVES—FLOW CONTROLS
HYDRAFORCE
.com
®
• Cartridges voltage interchangeable.
• Unitized, molded coil design.
• Coil waterproofi ng standard.
• Screw-in manual override option.
Threshold
Current (mA)
300 ± 200 mA
150 ± 35 mA
Blue rectangles are links to other catalog pages.
DIMENSIONS
PFR72-33x-L
2.408.2
2-Port, Pressure Compensated
®
HYDRAFORCE
HYDRAFORCE
.com
®
Cartridge: Steel with hardened
work surfaces. Zinc-plated
exposed surfaces.
Buna N O-rings and
back-ups standard.
Standard Ported Body:
Anodized high-strength
6061 T6 aluminum alloy,
rated to 207 bar (3000 psi).
Ductile iron bodies available;
dimensions may differ.
Consult factory.
Coil: D-Coil: See page 3.200.1
E-Coil: See page 3.400.1
Package Weight: 3.18 kg.
(7 lbs.)
Seal Kit: SK12-3x-MM (PV)
SK12-3x-TB (EC)
MATERIALS TO ORDER
Override
Option
(Blank) None
M Screw Type
Voltage
0 Less Coil
12 12 VDC
24 24 VDC
*Compensator Spring
6.89 bar (100 psi) 100
11.03 bar (160 psi) 160
PFR72-33 __ - L __ - 12T - __ - __ __ __ __
*Select Orifi ce Range and
Compensator Spring by
referring to the Performance
Curves on the preceding
page.
*PV Orifi ce Range
Orifi ce Range A
Orifi ce Range B
Coils with internal diode are
available. Consult factory.
Seals
Buna N (Std.) N
Fluorocarbon V
NOTE: The normally
open PV72-35 may
not be substituted in
this manifold due
to port logic factors.
Terminations D-Coil
DS Dual Spades
DG DIN 43650
DL Leadwires (2)
DL/W Leads w/Weatherpak
®
Connectors
Terminations E-Coil
IP69K Rated
ER Deutsch DT04-2P
EY Metri-Pack
®
150
Blue rectangles are links to other catalog pages.
