Seated valves type WV700

The BIERI series WV700 are direct operated and leakage free seated valves out of the series NG6 700 bar, suitable for highest demands. The modular principle of the major components allows a great variety of symbols – 2/2-, 3/2-, 3/3-, 4/2-, 4/3- way functions with positive or negative overlap. Hence these valves are superior and space-saving alternatives to spool valves which require additional shutoff valves.

[Translate to EN:] Wege-Sitzventile Typ WV700
Features Advantages
Pressure compensated design of valve cones, high magnetic force and strong return spring: Safe and fast switching, bidirectional flow on open shift position and double tight, leakage free tightness in closed position
Hardened seat elements (cone and seat): Long operating lifetime and reliability
Zinc nickel coated coils are optional available, valve body made of zinc coated and black passivated heat-treated steel: High corrosion resistance

Applications

  • Test benches and systems 
  • System engineering
  • Presses
  • Lifting and transport systems
  • Construction – e.g.  bridge construction


Design

  • 1 up to 4 valve cartridges depending on valve type 
  • Valve cones of cartridges are either pushed on the saets by springs or lifted off the seats by actuation tappets 
  • Low switching capacity due to pressure balanced valve cones

Technical Data

Hydraulic fluid Mineral oil according to DIN 51524 (other fluids on request)
Fluid temperature range -20 up to 80 °C
Ambient temperature range -30 up to 55 °C
Viscosity range 5 up 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 350 bar
Max. flow rate 25 l/min
Filtration (recommendation) According to NAS 1638, class 6 resp. ISO/DIN 4406 class 17/15/12
Duty cycle ED 100%  
Solenoid power 12 VDC (30 W), 24 VDC (31 W), 107 VDC (37 W), 196 VDC (40 W)
Power tolerance +/- 10%
Switching time 40 - 120 ms
Degree of protection IP 54 according to DIN 40050 (on request IP 65)
Material/Surface finish Body: Steel galvanized, black chromated
Solenoid: Steel browned, aluminium