Unloading valves DA700

BIERI cartridge directional poppet valve WS700 are compact, highly reliable and designed for high duty cycles and a long lifetime. The patented valve design is space saving and ready to use in tight installation conditions.

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

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[Translate to EN:] Druckabschaltventil Typ DA700
Features Advantages
Patented inline arrangement of cone / seat elements Poppet tight
Pressure compensated design of valve cones, high magnetic force and strong return spring Safe and fast switching, bidirectional flow on open shift position
Hardened seat elements (cone and seat) Long operating lifetime and reliability
Zinc nickel coated coils, valve body made of corrosion resistant heat-treatment steel Arbitrary position of solenoid coil, replacement of coils without opening of the pressure tight spaces
Check valves and orifices can be integrated High corrosion resistance
Plate mounted valve with drilling pattern according ISO 4401-03 360° turnable and exchangeable plug-in coil

Applications

  • Controlling of cylinders in higher pressure ranges as full replacement for spool valve technology (especially for poppet tight holding and bending)
  • Clamping technology & jig construction 
  • Machine tools - auxiliary functions
  • Forming technology - clamping
  • Small presses
  • Lifting and transport systems
  • Hydraulic tools
  • Test benches and systems
  • Construction
  • Recycling
  • Seat-tight pilot control of passive and/or active logic valves
  • Energy efficient circuits
  • Accumulator charging circuits

Design

  • Pressure compensated, hardened and specially grinded valve cones
  • Manual override
  • Available as 2/2-, 3/2-, 3/3-, 3/4-, 4/2-, 4/3- or 4/4-valve solenoid actuated
  • 360° turnable and exchangeable plug-in coil
  • Replacement of coils without opening of the pressure tight spaces (slip-in coils)
  • Integrated check valve and orificies available
  • Patented functional principle
  • Plate mounted valve with drilling pattern according to ISO 4401-03
  • Strong return springs

Technical data

Hydraulic fluid mineral oil according to DIN 51524 (other fluids on request)
Fluid temperature range – 20 to 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 700 bar
Max. operating pressure connection A, T 350 bar
Max. flow rate 25 l/min
Pilot pressure adjustable 25 bar up to 350 bar
Filtration (recommendation) according to NAS 1638 class 6 resp. ISO/DIN 4406 17/15/12
Weight 2.1 kg
Material valve body: steel, galvanized, chromated
cartridge body: steel corrosion resistant
adjusting knob: plastic