Quality Assured Industrial Services Ltd

For over 20 years Quality Assured have been providing plant servicing and support in the UK, primarily London and Home Counties. We have become a trusted supplier by continuing to provide exceptional service and Technical Support, from supply through to installation (encompassing pipework installation) and ongoing maintenance. We have always offered emergency breakdown cover 24/7 and continue to do so.

Our clients rely on our knowledge and expertise to deliver solutions that optimise their compressed air system performance – both in product and energy efficiency, reducing operational costs and increasing profitability. 

  • Plant Maintenance
  • Energy Management
  • Compressor Supply
  • Air Treatment Equipment
  • Control Systems
  • Installation Services
  • Vacuum Systems
  • Breathable Air Systems & Testing
  • F-Gas Regulations
  • System Components
  • Tube & Fittings


Variable Speed

  • 5.5 to 30kW Screw Compressors
  • 37 to 160kW Screw Compressors

Variable Speed Oil Free

  • 37-160kW Screw Compressors

Fixed Speed

  • 37-160kW Screw Compressors

Fixed Speed Oil Free

  • 37-160kW Screw Compressors

Reciprocating Compressors

  • New Lunair range


  • Line filters

Compressed Air Dryers

  • Refrigerated Thermal Mass Dryers
  • Refrigerated Direct Expansion
  • Desiccant Dryers
Compressed Air Dryers

System Controls

  • Air system Controller
  • Pressure Controller

Condensate Management


  • Electronic Non-loss
  • Pneumatic Non-loss
  • Polysep
Condensate Management


  • Blower overview

Parker Domnick Hunter

  • Oil-X Evolution high efficiency filtration
  • Polestar series refrigerated dryers
  • Pneudri range high effciency desiccant dryers
  • Autodrains
  • Oil/water separators
  • Nitrogen generators
Parker Domnick Hunter


  • Hose and tubing
  • Fittings
  • Valves
  • Pneumatics
  • Couplings
  • Many other products
  • Spare Parts

Pre-owned Equipment

  • Second Hand plant


  • Compressor control systems
  • Retrofit Inverters
  • Auditing

Energy Saving Projects

There are many ways to reduce energy consumption including:

  • Inverter driven compressors, for instance the Ingersoll Rand Nirvana series.
  • Installation of a ‘retrofit’ inverter to an existing fixed speed compressor.
  • Coordination of control of compressed air plant.
  • Reduction in system pressure.
  • Correct specification of air treatment equipment.

See our website for details of case studies.

Energy Saving Projects

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Quality Assured Industrial Services Ltd Overview