Series Qualitrol 141/146/148 y Serie de interruptores de control de presión AKM 35600/47500


Designed to provide operating control, limit or alarm functions for transformers and load tap changers. Contacts can be factory set or adjusted as needed. The snap-action switch automatically resets when pressure returns to pre-set conditions. Pressure and/or vacuum switches can be combined on a common manifold and protected by optional enclosure. Optional pressure indicators (dial gauges) are available on select models.


  • Reliable alarming for rising or falling pressure
  • Compact design is easy to install
  • Numerous configurations available for many applications
  • Available with cut off valve for field testing of switches
  • Tested and certified to be reliable
  • El confiable interruptor de acción rápida se reinicia automáticamente – no se requiere rearme manual
  • The single pole single throw (SPST) and single pole double throw (SPDT) switches are UL and CSA listed
  • Switches may be applied on systems using steam, air and other non-combustible gases
  • Pressure settings can be factory-set and/or adjustable by equipment manufacturer on select models
  • The high electrical rating of the snap-action switch often saves on the need for expensive relays


  • Presión de funcionamiento o vacío y funcionamiento al aumentar o disminuir la presión/vacío
  • Up to 3 switches, switch testing port
  • Mounting style
  • AKM 35600 is available with 3 way lockable test valve for isolation of pressure switch during operation testing
  • Compact 146 series of switches mount in any orientation inside control panel as an integral components

Grupo Created with Sketch. Applications

For pressure and/or vacuum alarming on transformers equipped with nitrogen blanket systems and other related electrical apparatus.

Indicador de presión y vacío Qualitrol 050

Indicador de control de presión Qualitrol 050

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Purgadores de control de presión Qualitrol 070

Serie de purgadores de control de presión Qualitrol 070

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Manómetro de control de presión Qualitrol 141,146,148 y AKM 35600, 47500

Series Qualitrol 141/146/148 y Serie de interruptores de control de presión AKM 35600/47500

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