Harris Model 356-Ar-He-580 Dual Flowmeter Regulator 3100140

By: Harris Products Group
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Model 356 dual flowmeter regulator is capable of providing two separate independent flows from one common gas source. It is equipped with two Model 55-2 flowmeters that can be set at different flow rates. It is ideal for back purging, trail purging and/or other dual applications. This model features sensitive needle valves for fingertip control and durable, easy-to-read, flow tubes and covers. It is equipped with a tamper-proof, self-reseating, high pressure relief safety valve. The regulator features a brass body, 2" brass dual scale gauge and one-piece encapsulated steel design with internal filter and PTFE Teflon® seat. It has a 5/8" - 18" (F) outlet connection. This model is UL® listed.


  • Flowmeter is UL® listed® and provides two separate flows from one common gas source
  • Regulator is compensated at 20 PSIG
  • Brass body and painted zinc bonnet for longer service life
  • Neoprene diaphragm for better pressure control
  • 2" Brass 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
  • Provides accurate flow-control to 140 SCFH
  • Equipped with two Model 55 flowmeters that can be set at different flow rates
  • Sensitive needle valve for fingertip control permits highly accurate flow settings

General Equipment

Body Brass
Bonnet Painted Zinc
Certification CGA E-4
UL® listed
Diaphragm Neoprene
Duty Dual heavy
Equipped With Model 55-2Ar/He 70 RH 1/4" NPT (M) Flowmeter - PN 5400619
Model 55-2Ar/He 70 LH 1/4" NPT (M) Flowmeter - PN 5400620
Flow Capacity (SCFH) 10 - 45 (10 - 140)
Gas / Gas Service Argon (Ar)
Helium (He)
Gauges 2" Brass dual scale
Inlet Connection CGA 580
Maximum Inlet Pressure (PSIG) 3000
Recommended Items/Accessories Single Black Inert Gas Hose - 3/16" x 10' - PN 4300138
Seat PTFE Teflon®
Supply Pressure Gauge (PSIG) 4000

Gas Regulation

Compensated PSIG 20
Outlet Connection 5/8" - 18 (F)


Warranty 7 Years