Harris Model 3500 Oxygen Single Stage Regulator 3500-125-540 - 3003500

By: Harris Products Group
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Model 3500 high-pressure, high-flow regulator is specifically designed to provide high gas flows from cylinders and to supply manifold gas systems. It is also ideal for special high-flow cylinder applications such as heavy cutting and heating. It has dual port outlets and a neoprene diaphragm. Includes a 3/8" NPT auxiliary port.


  • Operates on high pressure cylinders of up to 3000 psig
  • Ideal for special high flow cylinder applications
  • Easy-to-operate brass "T" screw bar adjusting handle
  • Brass body and bonnet for longer service life
  • Large 2.75" neoprene diaphragm for improved pressure control
  • 2.5" Brass dual scale easy-to-read gauges
  • One-piece encapsulated seat design with internal filter to protect the CTFE Kel-F® seat from particulate contamination
  • Equipped with a tamper-proof, self-reseating, internal high pressure safety relief valve
  • This model has dual outlet ports
  • Features 3/8" NPT outlet connection auxiliary port

General Equipment

Adjusting Screw Brass "T" screw bar
Body Brass
Bonnet Brass
Capacity High pressure
high flow
Certification CGA E-4
Cv 0.40
Delivery Pressure Gauge (PSIG) 200
Delivery Pressure Range (PSIG) 0 - 125
Diaphragm Neoprene
Equipped With Dual port outlets
3/8" NPT auxiliary port
Gas / Gas Service Oxygen
Gauges 2.5" Brass dual scale
Inlet Connection CGA 540
Maximum Inlet Pressure (PSIG) 3000
Recommended Items/Accessories Plug - Model 967 1/4" NPT - PN 9000306
Plug - Model 967 3/8" NPT Hex Socket - PN 9000373
Seat CTFE (Kel-F®)
Supply Pressure Gauge (PSIG) 4000

Gas Regulation

Outlet Connection 9/16" - 18 RH
Pressure Regulation PSIG/100 PSIG 0.90 psig


Warranty 1 Year