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
SL-CPD PILOT TO CLOSE CHECK VALVE, POPPET
HYDRAULIC SYMBOL
PERFORMANCE VALVE SPECIFICATIONS
DESCRIPTION
16 size, 1 5/16-12 thread, “SIXTEEN” series, pilot to close, poppet check valve.
OPERATION
The SL-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 a 2:1 pilot ratio, meaning that at least one half 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 seat for long life.
• Industry common cavity.
Nominal Flow 20 GPM (76 LPM)
Rated Operating Pressure 3500 PSI (241 bar)
Typical Internal Leakage (150 SSU) 5 drops/min
Pilot Ratio 2:1
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 .68 lbs (.31 kg)
Operating Fluid Media General Purpose Hydraulic Fluid
Cartridge Torque Requirements 90 ft-lbs (122 Nm)
Cavity SIXTEEN 3WS
Cavity Form Tool (Finishing) 40500021
Seal Kit 21191404
Actual Test Data (Cartridge Only)
0
50
100
150
200
250
300
350
400
0
450
5 1510 20 25 30 35 40
Flow (GPM)
0
5
10
15
20
25
30
0
Pressure Drop (PSI)
25 50 75 100 125 150
Flow (LPM)
Pressure Drop (bar)
Port 3 to 2
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
SL-CPD – – –
OPTIONS BODIES
Buna, 2:1 Ratio 02 Blank Without Body
Viton, 2:1 Ratio V2 S #12 SAE Ports
CRACK RESSURE
0015 15 PSI
0025 25 PSI
0050 50 PSI
0075 75 PSI
0100 100 PSI
± 10%
Body Weight: 1.89 lbs (.86 kg)
