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522 Series AutoSwitch

Enclosed pressure differential switchover with brass internals for high purity gas applications
5223004-01-001 shown

The 522 Series AutoSwitch is a continuous gas delivery system for critical purity applications typically in the laboratory or process plant. The 522 AutoSwitch features integral line regulation that automatically changes cylinder or bank priority from the primary source to a reserve supply without transmitting pressure fluctuations to the use line. The system may be used with one cylinder per side or with manifolds for increased storage capacity. Available options for the 522 Series AutoSwitch include internal pressure switches with warning lights for cylinder depletion or internal pressure transducers without warning lights. Both may be used with the CONCOA Altos 2™ remote alarm.

  • Metal-to-metal seal prevents the possibility of gas contamination
  • Integral line regulator provides stable line pressure during a changeover
  • Variable line pressure permits on-site line pressure changes
  • User-friendly priority valve ensures uninterrupted cylinder priority changeover
  • Optional intrinsic safety barriers supports use in hazardous areas or with flammable gases
  • Optional manifold extension allows simple field expandability
  • Max inlet pressure: 3000 PSIG (210 BAR)
  • Temperature range: -40°F to 140°F (-40°C to 60°C)
  • Max flow at 100 PSIG (7 BAR): 600 SCFH (283 LPM)
  • Cv: 0.1
  • Inlet connections: 1/2 in FNPT
  • Outlet connections: 1/4 in stainless steel compression tube
  • Relief valve outlet: 1/2 in FNPT
  • Helium leak integrity: 1 x 10⁻⁸ scc/sec
  • Weight: 40 lbs (18 kg)
  • Priority valve: Brass barstock
  • Line regulator: Brass barstock
  • Diaphragms: 316L stainless steel
  • Enclosure: NEMA 12, powder-coated steel
  • Tube and connections: 316L stainless steel
  • Internal seals: PTFE
  • Seats: PTFE (line regulator); PCTFE (inlet regulators)
  • Gauges: Brass; bronze; and stainless steel
  • Pressure switches (optional): Field-settable on inlet gauge, dry contact (opens below set point)
  • Check valves: Brass with FKM seals
  • Standard transducers (optional): 0-6000 PSIG (4-20 mA output)
  • Intrinsically safe transducers (optional): 0-5000 PSIG (4-20 mA output)
  • Conformances: Cleanliness meets or exceeds CGA G-4.1; ANSI/ASME B40.1; PED 2014/68/EU; CRN OH5216.5; CRN: OH17950.5
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See catalog page for ordering information.

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ID Number
522 Series AutoSwitch Catalog Page
522 Series AutoSwitch Systems Installation and Operation
CRN File OH17950
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.

CAPSULE® is a registered trademark of Controls Corporation of America; Altos 2™ is a registered trademark of Controls Corporation of America