MECHANICAL PRESSURE CONTROLS
4484 Boeing Drive Rockford, IL 61109 • USA • Phone +1 (815) 397-6628 • Fax +1 (815) 397-2526
mail: delta@delta-power.com • www.delta-power.com
WARNING: the specications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described (herein). Any specic application should not be undertaken
without independent study, evaluation, and testing for suitability.
W 51 / 12-2022
DE-RCD DIFFERENTIAL AREA RELIEF VALVE
HYDRAULIC SYMBOL
PERFORMANCE VALVE SPECIFICATIONS
DESCRIPTION
10 size, 7/8-14 thread, “Delta” series, differential area relief valve.
OPERATION
The DE-RCD blocks ow from (1) to (2) until sufcient pressure is present at (1) to force the poppet to open and
allow metered ow from (1) to (2). The cartridge offers smooth transition in response to load changes in common
hydraulic circuits.
FEATURES
• Hardened parts for long life.
• Industry common cavity.
Nominal Flow 15 GPM (57 LPM)
Rated Operating Pressure 3500 PSI (241 bar)
Viscosity Range 36 to 3000 SSU (3 to 647 cSt)
Filtration ISO 18/16/13
Media Operating Temp. Range -40° to 250°F (-40° to 120°C)
Weight .37 lbs (.17 kg)
Operating Fluid Media General Purpose Hydraulic Fluid
Cartridge Torque Requirements 30 ft-lbs (40.6 Nm)
Cavity DELTA 2W
Cavity Form Tool (Finishing) 40500000
Seal Kit 21191200
Actual Test Data (Cartridge Only)
0
500
1000
1500
2000
2500
3000
3500
0 2
4000
4 6 8 10 12 14 16
Flow (GPM)
0
50
100
150
200
0 5
250
Pressure Drop (PSI)
10 15 20 25 30 35 40 45 50 55 60
Flow (LPM)
2500
Pressure Drop (bar)
3500
Installation Space Saving Product. Cannot be eld
adjusted. Not recommended for crossover relief
valve applications, use DE-RWD.