MECHANICAL DIRECTIONAL 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
DF-CPD PILOT TO CLOSE CHECK VALVE, GUIDED BALL
HYDRAULIC SYMBOL
PERFORMANCE VALVE SPECIFICATIONS
DESCRIPTION
10 size, 7/8-14 thread, “Delta” series, pilot to close, ball check valve.
OPERATION
The DF-CPD allows free ow from (3) to (2), and blocks ow from (2) to (3). Flow will be blocked from (3) to (2)
when sufcient pressure is applied at (1). The cartridge has various “pilot ratios” (see options).
Example: 1/4 for 4:1 of the load pressure held at (3) is required at (1) to close the valve. The check is spring
biased to assure holding in static or no-load conditions.
FEATURES
• Hardened parts for long life.
• Industry common cavity.
Maximum Flow 10 GPM (38 LPM)
Rated Operating Pressure 3500 PSI (241 bar)
Typical Internal Leakage (150 SSU) 50 drops/min from (2) to (3)
5 drops/min from (3) to (2)
when port (1) is piloted
Pilot Ratio (see options)
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 .20 lbs (.09 kg)
Operating Fluid Media General Purpose Hydraulic Fluid
Cartridge Torque Requirements 30 ft-lbs (40.6 Nm)
Cavity DELTA 3W
Cavity Form Tool (Finishing) 40500001
Seal Kit 21191202
Actual Test Data (Cartridge Only)
0
50
100
150
200
0
250
4 62 8 10 12
Flow (GPM)
0
5
10
15
0 5 10
Pressure Drop (PSI)
15 20 25 30 35 4540
Flow (LPM)
Pressure Drop (bar)
Port 3 to 2 (4:1) Port 3 to 2 (6:1)
Consult chart for ow operation of each model.
Special higher bias spring values available.
Consult factory.
MECHANICAL DIRECTIONAL 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
DF-CPD – – –
OPTIONS BODIES
Buna, 4:1 Ratio 04 Blank Without Body
Buna, 6:1 Ratio 06 N 1/4” NPTF Ports
Viton, 4:1 Ratio V4 S #6 SAE Ports
Viton, 6:1 Ratio V6
CRACK RESSURE
0015 15 PSI
0025 25 PSI
0050 50 PSI
0075 75 PSI
0100 100 PSI
± 10%
Body Weight: .76 lbs (.35 kg)
