PROPORTIONAL CONTROLS
Delta Power Company
4484 Boeing Drive - Rockford, IL 61109
WARNING: The specifications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described
(herein). Any specific application should not be undertaken without independent study, evaluation, and testing for suitability.
Phone: (815) 397-6628 Fax: (815) 397-2526 E-mail: delta@delta-power.com
ES-PRZ Proportional Pressure Reducing Control Valve
DESCRIPTION
12 size, 1 1/16-12 thread, “Tecnord” series, solenoid operated, proportional pressure reducing control valve
OPERATION
When de-energized the ES-PRZ allows flow from (2) to (1) and blocks flow at (3).
As current is increased, fluid pressure is proportionally controlled at the regulated port 2. On attainment of
proportionally determined pressure at 2, the cartridge shifts to block flow at 3, thereby regulating pressure at
2. In this mode, the valve also will relieve 2 to 1 at a variable value over the set reducing pressure.
FEATURES
x Efficient wet-armature construction.
x Cartridges are voltage interchangeable.
x Unitized, molded coil design.
x Continuous duty rated solenoid.
x Optional coil voltages and terminations.
HYDRAULIC SYMBOL
Note: Low Wattage & I coils are available. Consult Factory for
Performance curves.
Tank Pressure level above zero is additive to the valves
expected reduced pressure value.
PERFORMANCE
Actual Test Data (Cartridge Only)
VALVE SPECIFICATIONS
Pressure vs Current Graph for ESPRZ at 300 psi inlet
0
60
120
180
240
300
0 20406080100
% of Maximum Control Current
Pressure (PSI)
0
5
10
15
20
Pressure (BAR)
Nominal Flow 30 GPM (114 LPM)
Max System Pressure 450 PSI (27.5 bar)
Viscosity Range 36 to 3000 SSU (3 to 647 cSt)
Filtration ISO 18/16/13
Media Operating
Temperature Range
-40q to 250q F (-40q to 120 q C)
Weight .67 lbs. (.3 kg)
Operating Fluid Media General Purpose Hydraulic Fluid
Cartridge Torque
Requirements
25 ft-lbs (33.9 Nm)
Coil Nut Torque
Requirements
4 – 6 ft-lbs (5.4 – 8.1 Nm)
Cavity 40200043
Seal Kit
COIL SPECIFICATIONS
Current Supply
Characteristics
PWM (Pulse Width Modulation)
Rated Current Range
100-900mA (12Volt)
50-450mA (24 Volt)
PWM or Superimposed
Dither Frequency
150-400 Hz
Coil Resistance (12 VDC)
Coil Resistance (24 VDC)
7.5 Ohm +/- 5% @ 68F (20C)
30.5 Ohm +/- 5% @ 68F (20C)
1
2
3
Page 536
PROPORTIONAL CONTROLS
Delta Power Company
4484 Boeing Drive - Rockford, IL 61109
WARNING: The specifications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described
(herein). Any specific application should not be undertaken without independent study, evaluation, and testing for suitability.
Phone: (815) 397-6628 Fax: (815) 397-2526 E-mail: delta@delta-power.com
DIMENSIONS
ORDERING INFORMATION
ES-PRZ - - -
OPTIONS BODIES
Buna Standard 00
Blank
Without Body
Viton Standard V0 * Consult Factory
VOLTAGE
12 12 VDC (.825 Amps Max.)
24 24 VDC (.412 Amps Max.)
“P” COIL TERMINATION
(All DC Except as Noted)
DL Double Lead SS Single Spade
DT Deutsch on Leads DT04-2P DS Double Spade
ML Metri-Pack on Leads HC DIN 43650 (Hirschman) – (DC)
PL Packard on Leads DI Deutsch – Integral DT04-2P
WL Weatherpack on Leads
Approximate Coil Weight: .42 lbs. (.19 kg.)
Note: Optional Pilot Supply Port.
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