Neon Controls - Series 44 Semi-Automatic Changeover Regulator

When the primary source bottle reaches the preset crossover point the secondary bottle automatically takes over. Turning the indicator knob so that the arrow points to the now-active source bottle allows replacing the original primary cylinder, which will then take over automatically when the secondary bottle is depleted. A wide variety of options such as pigtails, CGAs, check valves, pressure switches, and outlet valves allow you to customize this item to your specific requirements

The Series 44 semi-automatic changeover provides an uninterrupted supply of gas to your instrumentation or process. Incorporating two Neon Series 10 regulators into one body minimizes space requirements while providing the high purity construction of the Series 10. The outlet of this assembly feeds another Series 10 regulator to provide final regulation for your application.

Typical Applications:

  • Wherever a continuous supply of cylinder gas is required

Features & Benefits

  • Mountable Backing Plate
  • Compact, economical design with mounting bracket
  • Wide variety of construction materials, Cv values, outlet ranges, and other options
  • 2 year factory warranty

To Order: Choose Options and Use "Free Checkout" Option In Cart. A Formal Quote will be emailed to you with Pricing and Availability


Series #

Series 44

Operating Parameters

Pressure rating per criteria of CGA E-4; ASME B31; ASME BPVC

Maximum Inlet Pressure

6000 PSIG / 415 BAR

Maximum Outlet Pressure

  • 10, 25, 50, 100, 250, 500 PSIG
  • 70, 175, 345, 690, 1725, 3450 kPa
  • 0.7, 2, 4, 7, 20, 35 Bar

Design Proof Pressure

150% of Rated Pressure


Internal : Bubble Tight

External : Designed to meet < 2 x 10-8 atm/cc He

Operating Temperature

-40°F to 185°F / -40°C to 85

Flow Capacity

0.03, 0.07, 0.24, 0.3, 0.35, 0.58 Cv

Wetted Materials :

Body : Brass, 316L Stainless Steel, Monel, Electroless Nickel Plated Brass

Seat : Tefzel, Peek, PCTFE [standard], Vespel

Filter : 10 micron 316L Stainless Steel

Seal : Teflon, Viton

Diaphragm : 316L Stainless Steel with Tefzel Sealing Ring

Spring Housing : 316L Stainless Steel, Electroless Nickel Plated Aluminum, Black Anodized Aluminum

Remaining Parts : Inconel

Product Information Sheet

Series 44 Product Information Sheet

Special Order or Ordering Help

Please Email Us For Help


To Order: Choose Options and Use "Free Checkout" Option In Cart. A Formal Quote will be emailed to you with Pricing and Availability

Ship Time: 2-3 Weeks From Date of Order

Shipping Costs are Base Upon Delivery Location, Business or Residential. If You Have Any Questions or Are Unsure About Your Shipping Needs, Please Contact Us Before Purchasing

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Neon Controls - Series 44 Semi-Automatic Changeover Regulator

  • Brand: Neon Controls
  • Product Code: Series 44
  • Availability: In Stock
  • $0.00

Available Options

Tags: Neon Controls, Change Over Regulator, Regulator