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639 Series Switchover

Primary-reserve pressure differential switchover for high flow industrial laser process gases
6397003-01-42 shown

The 639 Series Switchover provides a continuous supply of laser assist gas from two high pressure sources. The 639 Series pressure differential switchover may be purchased with inlet options such as open ports or flexible pigtails, with or without an Altos 2 remote alarm, 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. The CONCOA 639 Series primary-reserve switchover system comes pre-mounted on a stainless steel panel, complete with flexible hoses for connections to bulk high pressure sources.

  • Dome-loaded pressure control ensures steady, high flow service
  • Primary and reserve bank automatically switches to reserve when depleted
  • Cartridge sensor provides precise pressure control
  • Optional Altos 2™ alarm provides visual and audible notification for continuous system operation
  • Optional line regulator maintains constant line pressure during changeover
  • Max inlet pressure: 3000 PSIG (210 BAR) PTFE; 4500 PSIG (310 BAR) PCTFE
  • Temperature range: -40°F to 140°F (-40°C to 60°C)
  • Gauges: 2 in (50 mm) diameter brass
  • Inlet/Outlet connections: 1/4 in FNPT
  • Cv: 0.2
  • Weight: 124 lbs (56 kg)
  • Regulator bodies: Brass barstock
  • Bonnets: Brass barstock
  • Internal seals: PTFE and FKM
  • Seats: PTFE and PCTFE
  • Filter: 40-micron sintered bronze
  • Pressure gauges: Brass (socket); Bronze (bourdon tube); Brass (case)
  • Flexible hoses (optional): Armor-case stainless steel lined
  • Conformances: Cleanliness meets or exceeds CGA G-4.1; ANSI/ASME B40.1; CRN OH5216.5; CRN OC17947.5
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See catalog page for ordering information.

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ID Number
639 Series Switchovers Catalog Page
639 Series 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