Proportional pressure relief valves PDV700

The BIERI PDV700 is a proportional pressure relief valve from the series NG6, 700 bar. It is available direct operated for small flow rates as well as – along with a main stage – pilot operated for higher flow rates and can be operated by various amplifiers which enable operations by «open loop» or «closed loop» control.

Operating pressure up to 700 bar
Max. flow rate 25 l/Min
Porting NG 6 Cartridge

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[Translate to EN:] Proportional-Druckbegrenzungsventile PDV700
Features Advantages
Available as 2/2 or 3/2 directional poppet cardridges with solenoid actuation Poppet tight (bidirectional)
Directly operated High operational safety and relieble switching
Hidden manual override High duty cycles and long lifetime
360° turnable and exchangeable plug-in coil High corrosion resistance
Patented valve design Replacement of coils without opening of the pressure tight spaces
Pressure compensated design of hardened and specially grinded valve cones All connections can be loaded to the maximum operating pressure

Applications

  • Portable power units
  • Control of cylinders as superior and space saving alternatives
    to spool valves which require additional leakage free shutoff valves
  • Forming technology - clamping
  • Presses, test benches and systems
  • Lifting and transport systems
  • Hydraulic tools
  • Accumulator charching systems
  • Seat-tight pilot control of passive and/or active logic valves

Design

  • Pressure compensated design of hardened and specially grinded valve cones
  • Available as 2/2 or 3/2 directional poppet valve cartridges with solenoid actuation
  • Strong return springs
  • 360° turnable and exchangeable plug-in-coil

Technical data

Hydraulic fluid mineral oil according to DIN 51524
(other fluids on request)
Fluid temperature range – 20 bis 80 °C
Ambient temperature range – 30 to 50 °C
Viscosity range 5 to 400 mm²/s
Porting NG 6 according to DIN 24340 / ISO 4401 / CETOP RP 121 H
Max. operating pressure connection P, A, B 700 bar
Max. operating pressure connection T 200 bar / recommended operating pressure T < 2 bar for optimum stability and full control range external T-connections are available
Max. flow rate direct operated: 2 l/min
pilot operated: 25 l/min
Filtration (recommendation) according to NAS 1638 class 6 or ISO/DIN 4406 17/15/12
Duty cycle DC 100%
Solenoid voltage (nominal resistance) 24 VDC (11 Ohm)
Degree of protection IP 65 nach EN 60529 / DIN 40050
Weight direct operated: 2.5 kg
pilot operated: 3.5 kg
Hysterese ≤ 5 % with optimal dither signal
Material housing: galvanized/black chromate
solenoid: galvanized