Flowmeter 355-2AR-580 Regulator

Model 355-2Ar-580 Pressure Compensated Flowmeter Regulator


Model 355-2Ar-580 compact pressure compensated flowmeter regulator for use with Argon (CO2)


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
  • Durable cover and easy-to-read flow tube provide accurate flow-control up to 140 SCFH
  • Dual calibration on 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


Warning -

Cancer and Reproductive Harm -


What's Included

  • Model 355-2Ar-580 Compact Pressure Compensated Flowmeter Regulator

Warranty Information

  • 7 Years



Body Brass
Bonnet Brass
Capacity Up to 140 SCFH
Certification CGA E-4
UL® listed
Compensated PSIG 20
Diaphragm Neoprene
Gas / Gas Service Argon (Carbon Dioxide - CO2)
Gauges 1.5" Steel dual scale
Inlet Connection CGA 580
Maximum Inlet Pressure (PSIG) 3000
Outlet Connection 5/8" - 18 RH (F)
Recommended Items/Accessories Inert Gas Hose 3/16" x 10' Single B&B R-Grade Black - PN 4300138
Scale Range SCFH 10 - 70 (10 - 70)
Seat PTFE Teflon®
Supply Pressure Gauge (PSIG) 0 - 4000


Warranty 7 Years