Keil-im-Keil-AbsperrschieberWedge-within-Wedge Gate Valves楔型闸板阀Клиновые задвижки типа
ProductsPetrochemical and Refining IndustriesWedge-within-Wedge Gate Valves
Update time: 17.11.2009

Wedge-within-Wedge Gate Valves

Wedge-within-Wedge Gate Valves

Design features

  • 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

Typical application

  • 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