Z&J Technologies GmbH

Z&J Technologies GmbH

Wedge Gate Valves



Metal to metal seating. Rising stem (O&Y type). Design as a round, oval or flat type valve. In accordance with German, ANSI or other standards. Suitable for any kind of operator. With flanges or butt-weld ends. Materials according to operating conditions. Rating up to 600 lbs. Operating temp. up to 1900°F (1050°C). Sizes up to ND 120 inch

The double disc arrangement with the internal wedge mechanism ensures

  • No jamming of the discs, not even under most stringent operating conditions. When actuating the non-selflocking wedges the discs collapse and are free to be moved.
  • Tightness and flexibility given by pressing of the discs via central ball between the internal wedges.
  • Minimum wear due to short travel contacts on the sealing seats.
  • Double Block and Purge or Bleed
  • Under low differential pressure seat surfaces free of wear due to axial pressing in closed position.
Operating conditions

  • High temperature
  • Temperature operational variation
  • Temperature operational differences
  • High differential pressure
  • Line Stresses
  • High frequency of operating
  • Quick closing and opening time

  • Catofin/MTBE plants to HOUDRY-process
  • Isosiv / TIP-units to UOP-process
  • Cyclic Powerformer Units
  • Ethylene plants
  • Fluidized catalytic cracking units (FCCU)
  • Coal gasification plants
  • Cupola furnace units
  • Zinc melting furnaces
  • Waste heat boilers

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