Full range of combined desuperheating and pressure reducing valves, also called steam conditioning stations. One common application of this type of equipment is to by-pass steam turbines.

Steam turbine by-pass

  • WELLAND & TUXHORN desuperheating and pressure reducing stations.
  • Optimum control of steam pressure and temperature; water absorbed throughout the operating range.
  • Motive steam desuperheating / atomising system. Part of the steam in the valve is exploited for re-injection at jet speed into the nozzles, thus helping to form steam mist and improving its absorption.
  • Maximum efficiency at low steam flow (low speeds) with shorter length of the required straight section of piping.
  • Custom designs for discharge conditions to the condenser via dump-tube.
  • Desuperheating at high and/or low pressures, output temperature control by calculating the balance of energy (enthalpy) during discharge to condenser.
  • In combination with an electrohydraulic system, it meets the DIN EN ISO 4126-5 safety standards for protection against line overpressure, as per TRD 421 TUV-approved system. This design allows for omission of the boiler safety valve given as the valve opens in cases of excessive HP line pressure.
  • Noise level guaranteed in accordance with VDMA 24422 regulations.
  • Complete hydraulic units and servo systems to control and operate the valves.
  • Supply of the complete set of auxiliary valves for regulation or isolation of steam and water injection.
  • Integrated solution for the turbine by-pass package: design and supply of equipment, control and legalisation philosophy.
  • Technical support for installation, start-up and maintenance.
  • Used by several main turbine manufacturers: SIEMENS, GE, ALSTOM, MAN, SKODA, HITACHI, MITSUBISHI, etc.