Directional poppet valves ATEX WVHX-4B

BIERI directional poppet valves out of series WVHX-4B are directly operated, poppet tight valves of size NG4, suitable for constant pressure ranges up to 700 bar with mineral oils. These electrically operated valves are suitable in in hazardous areas, in which devices of the marking CE Ex II 2G IIC T4 Gb and CE Ex II 2D IIIC T115°C Db are needed.

Max. operating pressure 700 bar
Max. flow rate 12 l/min
Porting NG 4 according to Bieri standard

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[Translate to EN:] Wege-Sitzventile WVMX / WVHX
Features Advantages
Surface mount body NG4, 700 bar, -20°C 2/2-, 3/2- and 4/2- seat tight way functions with defined pattern
Explosion proof marking of solenoid coil
CE Ex II 2G IIC T4 Gb and CE Ex II 2D IIIC T115°C Db 		Maximum wear resistance and insensitiveness against contamination
Patented, complete pressure compensation, leveraged magnetic force and strong return spring Safe and fast switching at all pressure at all pressure constallations
Ceramic valve balls and high-grade hardend seats out of special steel High corrosion resistance
4x 90° turnable and exchangeable plug-in coil Four positions of solenoid coil, replacement of coils without opening of the pressure tight spaces

Application

  • Hydraulic systems in hazardous areas
  • Lifting and transport systems
  • Hydraulic tools
  • Test benches and systems
  • Construction

Design

  • With hardened closing elements as cone or ball seat
  • Solenoids coil turnable (90° steps) and replaceable
  • Mounting on single subplates as “stand-alone” valves or in valve banks
    with subplates (see technical data sheets EAP-4B and APH/X-4B)
  • As 2/2, 3/2 or 4/2 (pilot-operated) valve with solenoid actuation
  • With sealed emergency manual override

Technical Data

Hydraulic fluid mineral oil according to DIN 51524 with ignition temperatures up to 185 °C (other fluids on request)
Fluid temperature range -20 to 80 °C (supply and drain sides)
Ambient temperature range -20 to 55 °C (valve banks with min. clearance 14 mm)
-20 to 65 °C ("stand-alone" valve)
Viscosity range 5 bis 400 mm²/s
Porting NG 4 according to Bieri standard
Max. operating pressure 700 bar
observe pressure difference from P to A, B to T (pp ≥ pA (pB) ≥ pT)
Max. flow rate 12 l/min
Filtration (recommendation) according NAS 1638 class 6 resp. ISO/DIN 4406 17/15/12
Duty cycle DC 100%
Solenoid voltage (nominal power) 24 VDC (17W)
Voltage tolerance +/- 10%
Switching time 40 - 120 ms
Degree of protection IP 63 according to EN 60529 / DIN 40050 (solenoid IP 66)
Weight see technical data sheet
Material corrosion-resistant steel and aluminium
(coil housing: ZnNi - corrosion protection)