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DUV Typ A

Steam Converting Valve (DUV Type A)

Hydraulic actuators – Made by Welland

Fewer interfaces, a perfectly matched valve and actuator system. Your single-source solution

Heavy-duty stem design for maximum durability and reliability

Heavy-duty yoke design for ultimate actuator stability.

Space-saving design – ideal for installations with limited space.

Water injection proportionally controlled by the valve stroke via an integrated cooling water lance

Minimal servicing effort

  • All wear parts interchangeable on site. Internals bolted or clamped, not welded!

First control stage designed as a perforated cage. This ensures lower susceptibility to erosion caused by wet steam.

The number of throttling stages is optimized to match the differential pressure, and all stages are fully interchangeable.

High-pressure injection into the core of the perforated cage ensures optimal evaporation of the cooling water, resulting in a rapid, low-lag phase change across the entire load range.

Design

  • Installation position: Vertical or horizontal
  • Body design: Angle pattern (Type S) or straight-way pattern (Type A)
  • Warm-up and drainage connections
  • Inlet and outlet diameters
  • Weld preparation shapes
  • Actuator type freely selectable: Hydraulic, pneumatic, or electric
  • Stroking times
  • Safety function via spring or accumulator tank
  • ASME / PED compliant
  • Bubble-tight shut-off compliant with DIN EN 12266-1, Leakage Rate A / ANSI FCI 70-2 Leakage Class V

Benefits

  • Hydraulic drive made by Welland:
    • Fewer interfaces
    • Coordinated valve and drive system
    • Single-source solution
  • Heavy-duty spindle design
  • Compact design
  • Heavy-duty yoke
  • Water injection regulated via the valve stroke by means of an integrated cooling water lance
  • Minimal maintenance required:
    • All wear parts replaceable on site
    • Internal parts bolted or plug-in, not welded
  • 1st control stage designed as a perforated cage
    • Thus less susceptible to erosion caused by wet steam
  • The number of control stages is optimally matched to the differential pressure, and all stages are fully replaceable.
  • High-pressure injection into the interior of the perforated cage ensures optimal evaporation of the cooling water, thereby guaranteeing a low-delay change of state across the entire load range.

Proven solutions in practice. Success across a wide range of applications.