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637 Series Autoswitch GL

Liquid primary, high pressure reserve switchover with brass internals for industrial gas applications
6373001-01-580 shown

The 637 Series AutoSwitch GL automatically switches from the primary side to the reserve side to provide an uninterrupted supply of industrial gas. This unit may be configured with or without the connections to connect to both high-pressure and liquid cylinders. The primary bank of the AutoSwitch system is configured for use with liquid cylinders with pressure up to 600 PSIG (41 bar). The reserve bank is configured for high pressure cylinders filled up to 3000 PSI (207 bar). The CONCOA 637 Series AutoSwitch GL can be configured to interface with an optional CONCOA Altos 2™ remote alarm and comes with a separate connector for its use.

  • 350 PSIG liquid cylinder primary with high pressure reserve lowers operating cost
  • Balanced main valve allows high flow capacity
  • Integral line regulator maintains stable line pressure during a changeover
  • Colored LED status lights provide visual indication of gas cylinder condition
  • Max inlet pressure: 3000 PSIG (210 BAR)
  • Temperature range: -40°F to 140°F (-40°C to 60°C)
  • Max flow: 1500 - 5000 SCFH (2360 LPM)
  • Inlet/Outlet connections: 1/2 in FNPT
  • Weight: 54 lbs (25 kg)
  • Line regulator bodies: Brass barstock
  • Diaphragms: Fabric-reinforced chloroprene
  • Enclosure: Powder-coated steel
  • Tubing and fittings: 316 stainless steel, brass, and copper
  • Internal seals: PTFE and chloroprene
  • Seats: EPDM, PCTFE, and FKM
  • Conformances: Cleanliness meets or exceeds CGA G-4.1; ANSI/ASME B40.1; CRN OF11809.2
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ID Number
637 Series AutoSwitch GL Catalog Page
637 Series AutoSwitch Systems Installation and Operation
CRN File OF11809

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