Harris Model 425 Ethylene, Methane Single Stage Regulator 425-125-350 - 3000787

Harris Products Group
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Model 425 is a premium, single-stage, industrial regulator that is an ideal choice for most industrial applications.

This regulator incorporates a number of Harris features designed to make it a rugged, long-lasting performer, including an exclusive tamper-proof, self-reseating internal HP safety valve and a neoprene diaphragm.

The 425 is also available in a multitude of pressure ranges and for all standard industry gases.


  • Single-stage industrial regulator with premium features
  • Designed for rugged, long-lasting performance
  • Easy-to-operate brass "T" screw
  • Brass body and bonnet for longer service life
  • Neoprene diaphragm for better pressure control
  • 2.5" Brass dual scale easy-to-read gauges
  • One-piece encapsulated seat design with internal filter to protect the PTFE Teflon® seat from particulate contamination
  • UL® listed
  • Equipped with a tamper-proof, self-reseating internal safety valve


Adjusting Screw Brass "T" screw
Body Brass
Bonnet Brass
Certification CGA E-4
UL® listed
Cv 0.17
Delivery Pressure Gauge (PSIG) 200
Delivery Pressure Range (PSIG) 0 - 125
Equipped With Tamper proof, self-reseating internal high pressure safety valve
Gas / Gas Service Ethylene
Gauges 2.5" Brass dual scale
Hose Connection/Fittings 9/16" - 18 LH
Inlet Connection CGA 350
Maximum Inlet Pressure (PSIG) 3000
Outlet Connection 9/16" - 18 LH
Pressure Regulation PSIG/100 PSIG 0.20
Recommended Items/Accessories Steel Gauge Guard Red (Fuel) - PN 4300238
Steel Gauge Guard Green (Oxygen) - PN 4300239
Adapter: 9/16" - 18(F) x 5/8" - 18(F) PN 90000002
Seat PTFE Teflon®
Supply Pressure Gauge (PSIG) 4000


Warranty 7 Years

Custom Field

Series 425
Gas Ethylene
Gas Methane
Max Inlet PSIG 3000
Delivery Pressure 0 - 125
Inlet Connection CGA 350
Outlet Connection 9/16" - 18 LH

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