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AMOT Model 4109 Vibro-Guard Valve is a 2-way acceleration sensing valve with optional electric microswitch.
It is closed under normal conditions and trips open to vent when vibration or shock exceeds the set level. This venting action, when used in a pneumatic safety control system, can be used to sound a pneumatic alarm or shut down malfunctioning equipment, or both. Failing bearings, broken blades, cracked, broken or bent shafts, misfiring, and accumulated deposits are a few of the items which the Vibro-Guard can detect.


  • Anodized (Gulfproofed) finish
  • Pneumatic and electric versions available
  • Reliable repeatability
  • Pneumatic reset/override available