WTA® Change-Over Valves Types 11.7, 11.8, 11.75 & 11.85 -CRANE ChemPharma & Energy | Linquip

WTA® Change-Over Valves Types 11.7, 11.8, 11.75 & 11.85

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Download WTA® Change-Over Valves Types 11.7, 11.8, 11.75 & 11.85 PDF Catalog
WTA® Change Over Valves are used to connect two safety valves to a pressure system using one pipe point. Here, one safety valve is in operation and one safety valve is on stand-by. The stand-by valve can be removed during ongoing operation for service, while protection of the pressure system against inadmissible pressures is maintained. The use of change over valves allows essential maintenance work to be carried out on a safety valve, without interruption of the plant operation. This is realized by simply switching over to the relevant stand by safety valve, thus protecting the plant against excessive overpressure.
  • The three-way change over valves are ideal for environments where continuous plant operation is essential

  • Extremely low pressure loss coefficients (zeta values from 0,60 to 1,05) permit optimal flow rates to fulfill the legal requirement of less than 3% pressure loss

  • Two designs are available for use in chemical, petrochemical, pharmaceutical or refining services: one with packing sealing (11.7/11.75) and one with bellows sealing (11.8/11.85)

WTA® Change-Over Valves Types 11.7, 11.8, 11.75 & 11.85 Specifications:

  • Max. working pressure (bar)

    -0.001
  • Maximum Temperature (C)

    400
  • Minimum Temperature (C)

    -200
  • DN from

    15
  • DN to

    400
  • Pressure Nominal from (bar)

    10
  • Pressure Nominal to (bar)

    400
  • Class from

    150
  • Class to

    2500
  • NPS from

    0.5
  • NPS to
    16
  • Design standard
    Design in accordance with TA-Luft (11.8/11.85)
  • Flange Standard (Drilling)
    Flange design in accordance with EN 1092-1 and ASME B 16.5.
  • Body Material
    Carbon steel 1.0619 / WCB / WCC, Stainless steel 1.4408 / CF8M, Low temperature carbon steel 1.6220 / LCB / LCC
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