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-RWD DIFFERENTIAL AREA RELIEF VALVE
DESCRIPTION
10 size, 7/8-14 thread, “Delta” series, differential area relief valve.
OPERATION
The DE-RWD 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).
FEATURES
• Hardened parts for long life.
• Industry common cavity.
VALVE SPECIFICATIONS
Nominal Flow 15 GPM (57 LPM)
Rated Operating Pressure 4000 PSI (276 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 .55 lbs (.25 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
0
500
1000
1500
2000
2500
3000
3500
4000
0 2
4500
4 6 8 10 12 14 16
Flow (GPM)
0
50
100
150
200
250
Pressure Drop (PSI)
0
300
5 10 15 20 25 30 35 40 45 50 55 60
Flow (LPM)
Pressure Drop (bar)
Port 1 to 2 Port 1 to 2 Port 1 to 2
HYDRAULIC SYMBOL
PERFORMANCE
Actual Test Data (Cartridge Only)
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
DIMENSIONS
ORDERING INFORMATION
DE-RWD – – –
OPTIONS BODIES
Buna, External Adj. W/Locknut 00 Blank Without Body
Viton, External Adj. W/Locknut V0 N 3/8” NPTF Ports
Buna, Knob 0K S #8 SAE Ports
Viton, Knob VK
Buna, Internal Adjust 0I
Viton, Internal Adjust VI
Buna, Tamper Proof 0T PRESSURE RANGE/SETTING
Viton, Tamper Proof VT Ext./Int. Adjustable
1000 100 - 1000 PSI
3000 100 - 3000 PSI
4000 3000 - 4000 PSI
Tamper Proof
Fill in 4 Digit Pressure Setting
Example: 0500 - 500 PSI
Body Weight: .47 lbs (.21 kg)
Note: aluminum NOT durability rated for
4000 PSI. Consult factory for options.
