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Simplex or Duplex?

Simplex or Duplex?Q-VAC simplex vacuum priming systems incorporate just one vacuum pump to provide effective pump priming at the lowest cost and with the most compact dimensions.  For critical applications requiring redundancy, a duplex system should be considered. 

Q-VAC offers dependable simplex priming systems using a variety of vacuum pump technologies and configurations.  PLC controls are standard on many of our simplex systems.  PLC controls are available on all systems. 

Regardless of the vacuum technology employed, all standard simplex systems share the following features:

  • High quality vacuum pump with all necessary accessories for proper operation & long life
  • TEFC electric motor (IP55 typical)
  • Single point connections
  • Features to make installation and maintenance fast and easy
  • Stainless steel flex connector
  • Galvanized ASME code receiver tank (internal coating options available)
  • Fork truck lifting rails (larger systems)
  • Receiver sight level gauge
  • Flooded vacuum receiver alarm switch
  • Receiver drain valve
  • Vacuum release valve with silencer to facilitate easy maintenance
  • System isolation valve
  • Liquid filled vacuum gauge
  • NEMA 4 control panel enclosure (NEMA 4X available)
  • Automatic controls with alarm monitoring (PLC controls available)
  • Dry contacts for remote monitoring
  • UL / cUL 508 panel shop label
  • Uniform coating system on all external ferrous components

Q-VAC duplex priming systems have two vacuum pumps and are available with several vacuum technologies. 

A duplex system provides the security of built-in redundancy, lower cost operation, and advanced controls with lead-lag operation and automatic alternation.  Since two vacuum pumps operate together during initial priming, smaller vacuum pumps can be selected without sacrificing performance. However, to maximize efficiency after the initial prime, only one vacuum pump runs during normal operation to restore system vacuum. Not only does this reduce power consumption and operating costs, it also reduces the run time on each vacuum pump to extend maintenance intervals and maximize life.  PLC controls are standard on all duplex systems to provide increased safety, enhanced features, and the most reliable operation.

Simplex or Duplex?Regardless of the vacuum technology employed, all standard duplex systems share the following features:

  • High quality vacuum pumps with all necessary accessories for proper operation & long life
  • TEFC electric motors (IP55 typical)
  • Single point connections
  • Features to make installation and maintenance fast and easy
  • Stainless steel flex connectors
  • Galvanized ASME code receiver tank (internal coating options available)
  • Fork truck lifting rails (larger systems)
  • Receiver sight level gauge
  • Flooded vacuum receiver alarm switch
  • Receiver drain valve
  • Vacuum release valves with silencer to facilitate easy maintenance
  • System isolation valve
  • Liquid filled vacuum gauge
  • NEMA 4 (IP66) control panel enclosure (NEMA 4X / IP67 available)
  • PLC controls with alarm monitoring
  • Dry contacts for remote monitoring
  • UL / cUL 508 panel shop label
  • Uniform coating system on all external ferrous components
  • Full warranty on all components and accessories