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Hi Lo HL3500 FabMaster Elite High Pressure 300bar Inert Regulator

  • Handle demanding applications with ease
  • Optimise safety and control with crystal-clear gauges
  • Rugged construction ensures long-lasting performance
  • Manufactured under the highest quality standards
  • Available in standard and nevoc fittings


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Over 50 years welding expertise
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Master high-pressure inert gas applications with the Hi-Lo HL3500 FabMaster Elite, the industry’s elite regulator for unparalleled precision and control.

Engineered for professionals who demand the best, the HL3500 tames even the most demanding inert gases with its robust design and exceptional performance. Whether you’re a seasoned welder, a fabrication specialist, or a critical flow application manager, the HL3500 delivers the unwavering performance you can trust.

The Hi-Lo HL3500 FabMaster Elite: Take command of your inert gas applications and experience the difference that precision control delivers.


  • Unmatched Pressure Handling: The HL3500 boasts a maximum inlet pressure of 300 bar (4350 psi), making it ideal for high-pressure inert gas applications
  • Crystal-Clear Monitoring: Dual pressure gauges conforming to BS EN ISO 2503 provide unparalleled readability for optimal safety and control during operation
  • Rugged Durability: Constructed from high-strength brass bar stock, the HL3500 is built to endure harsh environments and rigorous daily use
  • Confidence in Every Application: Manufactured under BS EN ISO 9001 standards, the HL3500 meets the most stringent international quality requirements
  • Available in Standard and Nevoc Fittings: The HL3500 offers the flexibility you need to match your specific application requirements. Choose from standard or nevoc fittings to ensure seamless compatibility with your existing gas delivery system


  • High-Pressure Welding: Maintain precise inert gas flow for TIG welding, ensuring optimal weld quality and minimal contamination
  • Chemical Processing: Deliver inert gas with pinpoint accuracy for critical chemical processes, safeguarding product integrity
  • Inert Gas Purging: Effectively purge systems with inert gas to prevent oxidation and ensure optimal performance
  • High-Pressure Transfer: Safely and efficiently transfer high-pressure inert gas with confidence



Part No. Description
HL050169 Standard Fitting
HL050167SEN Nevoc Fitting


Inlet connection: G5/8 BSP RH

Outlet connection: G3/8 BSP RH

Pressure gauges conforms to BS EN 5171

Manufactured under BS EN ISO 9001



Additional information
Brand Hi Lo
Entry Side
Fuel Type Argon , Argon/CO2 , Helium , Inert , Nitrogen
No. of Gauges 2 Gauges
Fitting NEVOC , Standard

Click and Collect:
Free Click and Collect with no minimum spend from our warehouse on the Empress Park, Southampton with on-site parking. Once your order has been processed, we will advise you when it is ready for pickup.  Just want advice?  No problem.  Feel free to call in to speak to one of our friendly experts.

EWS Fleet Coverage Areas: 
Southampton | Eastleigh | Winchester | Alton | Farnham | Petersfield | Havant | Hayling Island | Waterlooville | Fareham | Portsmouth | Gosport | Chichester | Arun | Worthing | New Forest | Christchurch | Salisbury | Wiltshire | Test Valley | Basingstoke and Deane | West Berkshire | Reading | Hart | Waverley | East Hampshire | East Dorset | Hampshire | Bournemouth | Poole | Lymington | Ringwood | Verwood | East Preston | Goring-by-Sea | Lancing | Shoreham-by-Sea | Steyning | Bramber | Horsham | Adur

Nationwide Delivery (all items excluding gas cylinders):
Free UK mainland (England, Scotland and Wales) delivery on orders over £85 inc. VAT.
UK mainland delivery is £7.50 inc. VAT on orders under £85 inc. VAT.
UK islands and Northern Ireland shipping costs may vary.

UK Delivery for Gas Cylinders:
Shipping costs for gas cylinders are calculated at checkout once the delivery postcode is entered.

International Delivery:
Please contact us for an accurate delivery quote.

Hi Lo HL3500 FabMaster Elite High Pressure 300bar Regulator

Hi Lo HL3500 FabMaster Elite High Pressure 300bar Inert Regulator

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