QUALITROL 141/146/148 and AKM 35600/47500 Pressure or vacuum switches

Tested and certified for accurate notification of pressure change

QUALITROL 141/146/148 and AKM 35600/47500 Pressure or vacuum switches
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
  • Numerous configurations available for many applications
  • Available with cut off valve for field testing of switches

Tested and certified to be reliable 

  • Reliable snap-action switch resets automatically - no manual reset is required
  • The single pole single throw (SPST) and single pole double throw (SPDT) switches are UL and CSA listed
  • Repeatability of ±5% or ± 0.4 PSI (3 kPa) of the switch set points provides safe and reliable alarm functions
  • AKM 35600 models have been verified to react in less than 15 milliseconds when pressure changes at a rate between 29 - 72.5 KPSI (20-50 MPa) per second past switch settings, for fast detection of pressure changes

Wide array of options allow for perfect solution to almost any application 

  • Optional indication dial is available on 141 and 148 models for accurate monitoring of pressure
  • 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
  • AKM 35600 is available with 3 way lockable test valve for isolation of pressure switch during operation testing

Rugged designs withstand harsh environments 

  • For outdoor applications, select models come with a deep gasketed enclosure, rated at IP55 (NEMA 4)
  • AKM 35600 comes standard with a weather proof case (IP55) for surviving in weather exposed installations
  • AKM 35600 has passed life tests of 6 million cycles (switch actuations)

Compact design is easy to install 

  • Compact 146 series of switches mount in any orientation inside control panel as an integral components
  • Electrical connection options include standard quick connect, screw or solder terminals for a variety of applications
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  • Operating pressure or vacuum and operation on rising or falling pressure/vacuum
  • Up to 3 switches, switch testing port
  • Mounting style 
For pressure and/or vacuum alarming on transformers equipped with nitrogen blanket systems and other related electrical apparatus.

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