Series 145 Vacuum Sentry
System Protection During Pump Failure

photo - Series 145 VACUUM SENTRY Safety Valve

MKS Series 145 Vacuum Sentry® is a patented safety valve that protects a vacuum system in the event of a power failure by isolating the vacuum system and venting the mechanical pump. The Vacuum Sentry protects vacuum systems from oil backstreaming via the pump. A small orifice vents the mechanical pump slowly to atmospheric pressure for easy restart when power returns.

Features & Benefits:

  • Protects vacuum system from oil backstreaming in the event of power failure
  • Enables quick system restarts by venting the pump to atmosphere
  • Operates up to 100,000 cycles
  • No external pressurized gas source required


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Part NumberPriceQTY
Series 145 VACUUM SENTRY® Safety ValveQuote Only

Need help?

Contact an Application Specialist by sending an email to MKS Instruments or call 303-449-9861.