Pressure Reducing and Desuperheating Stations

The Worcot UK, Pressure Reducing and Desuperheating stations (PRDS) represent the most universal and compact solution for pressure reduction and desuperheating of turbine by-pass lines, discharging both to intermediate or low pressure sections of power stations. The spherical body shape design, together with the high quality of construction materials, allow a more uniform wall thickness than the conventional ones, fabricated by welding bodies, reducing pressure and temperature fatigue effects and improving welded joints quality.

Features

  • Designed to handle high pressure drops
  • Body fully machined forgings and casting with welded inlet connection and integral downstream injection chamber
  • Can be supplied as a combined unit for pressure/temperature control

Pressure reduction

  • Multi-Stage, Cage-guided unbalanced and balanced plug with pilot
  • First pressure reduction stage is performed by a specially drilled cage.
  • Seat ring is welded to the body through an easily removable tension free lip-seal
  • Quick change seat ring is available on request as special construction.
  • Labyrinth Disk Stack according to service conditions

Desuperheating

  • Precisely matched to load case
  • Downstream pressurized atomization
  • Integrated injection

Pressure classes

  • ASME 150 – 4500

Sizes

  • 2” – 36” (50mm – 900mm)
  • according to service conditions

Materials

  • Body Globe and Angle according to customized
  • A216-WCB/WCC, A217-WC6, A217-WC9, A217-C12A
  • A182 F11/F12, A182 F22, A182 F91, other materials under request

Leakage class (according to FCI-70.2)

  • up to ANSI class V both for balanced and unbalanced plug.

Actuator

  • Spring-diaphragm
  • Pneumatic Cylinder
  • Electrical Motorized
  • Electro-Hydraulic

Advantages

  • Closed control of pressure and temperature, flexible plant systematization will save energy, good conditioned steam reduces cost in control system.
  • Piping arrangement simplified, reduces components and eventually overall cost.
  • Shortens pipeline enabling easy piping arrangement. Eliminates auxiliary steam line saving energy.
  • Easy maintenance, Fewer components reduce maintenance cost.
  • Environment improved, Noise generated may be attenuated to offer quiet environment.
  • Valve vibration is eliminated to assure safe operation.

Industries

  • Power Plant