PRESSURE CONTROLS
Delta Power Company
4484 Boeing Drive - Rockford, IL 61109
WARNING: The specifications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described
(herein). Any specific application should not be undertaken without independent study, evaluation, and testing for suitability.
Phone: (815) 397-6628 Fax: (815) 397-2526 E-mail: delta@delta-power.com
DF-PUV Pilot Operated Unloading Valve
DESCRIPTION
10 size, 7/8-14 thread, “Delta” series, pilot operated unloading valve
OPERATION
The DF-PUV blocks all ports until pressure at port (2) exceeds pressure setting, or pressure at port (3) is
above 80 % of pressure setting.
FEATURES
• Hardened parts for long life.
• Industry common cavity.
HYDRAULIC SYMBOL
Typical circuits require an orifice to be placed at ports (2) and (3).
PERFORMANCE
Actual Test Data (Cartridge Only)
VALVE SPECIFICATIONS
Nominal Flow
1 GPM (3.8 LPM)
Rated Operating Pressure 4000 PSI (276 bar)
Loading Pressure as % of
Unloading Pressure
80% (Ex. If the PUV cracks at 3000
PSI, it will reseat at 2400 PSI)
Viscosity Range 36 to 3000 SSU (3 to 647 cSt)
Filtration ISO 18/16/13
Media Operating
Temperature Range
-40° to 250° F (-40° to 120° C)
Weight .60 lbs. (.27 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 (min. pre-drill .563 dia.)
Seal Kit 21191206
0
5
10
15
20
0 0.25 0.5 0.75 1
Flow (GPM)
Pressure Drop (PSI)
0
0.25
0.5
0.75
1
1.25
0 0.05 0.1 0.15 0.2 0.25
Flow (LPM)
Pressure Drop (BAR)
Port 2 to 1 (full pilot pressue applied @ port 3)
2
1
3
Page 442
PRESSURE CONTROLS
Delta Power Company
4484 Boeing Drive - Rockford, IL 61109
WARNING: The specifications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described
(herein). Any specific application should not be undertaken without independent study, evaluation, and testing for suitability.
Phone: (815) 397-6628 Fax: (815) 397-2526 E-mail: delta@delta-power.com
DIMENSIONS
ORDERING INFORMATION
DF-PUV - - -
OPTIONS BODIES
Buna Standard 00 Blank Without Body
Viton Standard V0 N 1/4 NPTF Ports
Buna, Knob 0K S #6 SAE Ports
Viton, Knob VK
Internally Adj. Buna 0I PRESSURE RANGE/SETTING
Internally Adj. Viton VI Ext./Int. Adjustable
Tamper Proof Buna 0T 3000 300 – 3000 PSI
Tamper Proof Viton VT
Tamper Proof
Fill in 4 Digit Pressure Setting
Example: 0500 – 500 PSI
Page 443
