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677 Series Switchover

Stainless steel high flow pressure differential switchover for high purity gas applications
67749E2-01-001R shown

The 677 Series Switchover is designed to provide a continuous supply of high purity gas at high flow rates with relatively low static for optimal gas usage from the source. The 677 Series pressure differential switchover is suitable for use with high purity, non-corrosive gases such as nitrogen, argon, helium, hydrogen, methane, oxygen, or mixtures of these gases. It is available with special EPDM seats for use with carbon dioxide, nitrous oxide, and certain hydrocarbons that cannot be used with the standard FKM seats. The CONCOA 677 Series switchover may be purchased with open inlet ports or with inlet shut-off valves, with or without inlet purge valves, and with or without an integral line regulator. If constant regulated outlet pressure is required, either the integral line regulator option is required, or a regulator will need to be installed downstream after the switchover system.

  • 67S Series style regulators with FKM or EPDM seat allows customization and integration capabilities
  • 316L stainless steel internal filter limits the possibility of gas contamination
  • User-friendly priority valve facilitates cylinder priority changeover with no interruption in gas flow
  • Integral line regulator option provides stable line pressure during changeover
  • Easy integration with Altos 2™ alarm system delivers advance notification of switchover
  • Optional purge valve permits purging after cylinder changeover
  • Optional outlet valve enables isolation of pipeline
  • Max inlet pressure: 3000 PSIG (210 BAR)
  • Temperature range: -40°F to 140°F (-40°C to 60°C)
  • Gauges: 2 in (50 mm) diameter stainless steel
  • Outlet connections: 1/2 in MNPT (without line regulator); 1/2 in FNPT (with line regulator or outlet valve)
  • Standard transducers (optional): 0-6000 PSIG (4-20 mA output)
  • Intrinsically safe transducers (optional): 0-5000 PSIG (4-20 mA output)
  • Cv: 2.3
  • Weight: 37 lbs (16.8 kgs)
  • Regulator bodies: 316L stainless steel barstock
  • Bonnets: 316L stainless steel barstock
  • Seats: FKM or EPDM
  • Dynamic cartridges: 316L stainless steel barstock
  • Internal seals: PTFE and FKM
  • Filters: 40-micron 316L stainless steel
  • Conformances: Cleaned for oxygen service; PED 2014/68/EU; ANSI/ASME B40.1; CRN OH5216.5; CRN OC1797.5
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See catalog page for ordering information.

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ID Number
677 Series High Flow Switchovers Catalog Page
677 Series Stainless Steel High Flow Automatic Switchover Systems Installation and Operation
CRN File OC17947
CRN File OH5216

WARNING: This product can expose you to chemicals including Lead, Chromium, Nickel, and 1-3 Butadiene, which are known to the state of California to cause cancer, birth defects, or other reproductive harm. And, this product can expose you to chemicals including Bisphenol A (BPA) which is known to the State of California to cause female reproductive harm. For more information go to www.

Altos 2™ is a registered trademark of Controls Corporation of America