Harris Model 355-2 Carbon Dioxide (AR) Flowmeter Regulator 355-2-CD-320 - 3100201

Harris Products Group
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Model 355-2 incorporates a regulator and flowmeter into one compact unit. It is pressure compensated to 20 psig. The flow tube and float are easily changed for different gases. The flow tube has dual calibration. It includes a sensitive needle valve for fingertip control and durable, easy-to-read, flow tube and cover. The regulator features a brass body, 1.5” steel dual scale gauge and one-piece encapsulated seat design with internal filter and PTFE Teflon® seat. This flowmeter regulator is UL® listed. The outlet connection is 5/8" - 18" (F). For vertical mounting only.


  • Compact, pressure compensated to 20 psig UL® listed flowmeter regulator in one unit
  • Brass body and bonnet for longer service life
  • Neoprene diaphragm for better pressure control
  • 1.5" Steel dual scale easy-to-read gauge
  • One-piece encapsulated seat design with internal filter to protect the PTFE Teflon® seat from particulate contamination
  • Dual calibration on flow tube
  • Dual calibration on Argon/Carbon Dioxide flow tube
  • Sensitive needle valve for fingertip control permits highly accurate flow settings
  • Flow tube and float are easily changed for different gases
  • Vertical mounting only

General Equipment

Body Brass
Bonnet Brass
Capacity Up to 140 SCFH
Certification CGA E-4
UL® listed
Diaphragm Neoprene
Gas / Gas Service Carbon Dioxide (Argon - Ar)
Gauges 1.5" Steel dual scale
Inlet Connection CGA 320
Maximum Inlet Pressure (PSIG) 3000
Recommended Items/Accessories Inert Gas Hose 3/16" x 10' Single B&B R-Grade Black - PN 4300138
Seat PTFE Teflon®
Supply Pressure Gauge (PSIG) 0 - 4000

Gas Regulation

Compensated PSIG 20
Outlet Connection 5/8" - 18 RH (F)
Scale Range SCFH 10 - 70* (10 - 70) - * On maximum continuous duty cycle, CO2 flows to 20 SCFH


Warranty 7 Years

Custom Field

Gas Argon
Gas CO2
Compensated PSIG 20
Max Inlet PSIG 3000
Inlet Connection CGA 320
Outlet Connection 5 /8" - 18 (F)

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