Cartridge Valves & Manifolds - HYDAC USA

Proportional Valves
PDB10P-01
Pressure Relief, Pilot Operated, Spool Type
31 gpm (120 l/min) • 5000 psi (350 bar)
Hydraulic Symbol
1
Description
A screw-in cartridge, pilot operated, spool type, pressure relief valve, intended
for use as a pressure limiting device. This valve can be infinitely adjusted across
a specified range using a variable electric input. Pressure output is proportional
to DC current input.
2
Operation
The PDB10P-01 blocks flow from port 1 to port 2 until sufficient pressure is
reached at port 1 to open the pilot stage by offsetting the electrically induced
solenoid force. The pilot stage opens and allows flow from the back of the main
piston to port 2. The resulting pressure imbalance causes the main spool to move
against the return spring and allows flow from port 1 to port 2.
Electrical current increase will increase the relief pressure setting. With no current
applied to the solenoid, the valve will relieve at approximately 75 psi.
Features
• Excellent stability throughout flow range
• 12 and 24 volt proportional waterproof coils
• Screen on pilot orifice to enhance safety
• Manual override option
Performance
% of Maximum Relieving Pressure
125
100
75
50
25
1
2
Measured at 158 SUS (34 cSt)
= 115°F (46°C)
T Oil
0
10 20 30 40 50 60 70 80 90 100
% of Maximum Control Current
Specifications
Operating Pressure 5000 psi (350 bar) max at port 2
Nominal Flow
31 gpm (120 l/min)
Maximum Pilot Flow
3.75 cu in/min. (0.5 l/min)
Relieving Pressure Ranges
(0 to maximum control current)
75 to 870 psi (5 to 60 bar)
75 to 3300 psi (5 to 230 bar)
75 to 5000 psi (5 to 350 bar)
Maximum Control Current 2.1 amps for 12VDC coil (2.2 Ohms)
1.05 amps for 24VDC coil (8.8 Ohms)
Dither Frequency
160 to 250 Hz
Hysteresis With Dither
2-4% of maximum control current
Typical Step Response Time ON: approx 50 ms, OFF: approx. 30 ms
Repeatability