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
DESCRIPTION
10 size, 7/8-14 thread, “Delta” series, direct acting check valve with thermal relief.
OPERATION
The DE-CVT allows free ow passage from (2) to (1), and blocks ow from (1) to (2). If the pressure at (1)
exceeds the thermal relief valve setting, a small amount of oil will be allowed to pass from (1) to (2), preventing
cylinder damage from excessive pressure. The cartridge has a fully guided poppet, which is spring biased closed
until sufcient pressure is applied at (2) to open to (1).
Note: the relief valve feature is not intended for use in dynamic pressure limiting applications. Consult factory.
FEATURES
• Hardened parts for long life.
• Optional bias springs for backpressure application exibility.
• Fully guided poppet assembly.
• Industry common cavity.
DE-CVT DIRECT ACTING CHECK VALVE THERMAL RELIEF, POPPET
PERFORMANCE
Actual Test Data (Cartridge Only)
0
500
1000
1500
2000
2500
3000
3500
0.0 0.1 0.2 0.3 0.4 0.5
Flow (GPM)
0
50
100
150
0
200
10.5
Pressure Drop (PSI)
1.5
Flow (LPM)
Pressure Drop (bar)
Port 1 to 2
0
25
50
75
100
0
125
5 10 15 20
Flow (GP M)
0
5
0 25 50 75
Pressure Drop (PSI)
Flo w (LPM )
Pressure Drop (bar)
Po rt 2 to 1
Nominal ow rating is 15 GPM for free ow port (2) to (1).
Consult chart for free ow dierential pressure.
Thermal relief is cyclic rated to 0.1 GPM. Port (1) to (2)
chart demonstrates override characteristics for a typical
thermal relief application.
HYDRAULIC SYMBOL
VALVE SPECIFICATIONS
Nominal Flow 15 GPM (57 LPM)
Rated Operating Pressure 4000 PSI (276 bar)
Typical Internal Leakage (150 SSU) 0-10 drops/min
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 .31 lbs (.14 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
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
Body Weight: .47 lbs (.21 kg)
DE-CVT – – – –
OPTIONS BODIES
Buna Standard 00 Blank Without Body
Viton Standard V0 N 3/8” NPTF Ports
S #8 SAE Ports
PRESSURE SETTING
1000 PSI 1 VOLTAGE
2000 PSI 2 0020 20 PSI
3000 PSI 3 0100 100 PSI
4000 PSI 4 ± 10%
WARNING
DO NOT USE ALUMINUM BODY
HIGH PRESSURE (4000 PSI) PRODUCT
