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About Us

With over 70 years’ history, Elmac has established an enviable, global reputation for the design, manufacture and supply of process critical safety products. Our innovative flame arresters and low pressure venting equipment are utilised by discerning OEM’s and Operators in a wide range of industry sectors including: oil & gas, petrochemicals, bio-fuels, mining, pharmaceuticals, power generation, agrochemicals and distilleries.

Located in the UK, with state-of-the-art design, manufacturing, testing and commercial facilities, Elmac Technologies is rapidly developing a comprehensive range of enhanced in-line and end-of-line deflagration arresters and in-line unstable detonation arresters. These devices are suitable for use in explosion groups IIA, IIB3 and IIC having been rigorously tested in accordance with relevant international standards. The Elmac product range also incorporates a wide range of valves and other low pressure venting equipment designed to meet client-specific requirements.

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Our Vision & Values

The Elmac Technologies ethos is centred on a vision and corporate values with one core purpose: Protecting People, Property and our Planet. This guiding principle has defined our innovative R&D, efficient operations and unparalleled customer service throughout our 70 years’ history.

Established as world-renowned leaders in the design, manufacture and supply of innovative, ‘best-in-class’ Flame Arresters and low-pressure Tank Protection Solutions providing high stakeholder returns and exceptional customer service to industry-leading business partners.

  • Safety – Protecting People, Property and our Planet
  • Reliability – Taking pride in Exceeding Customer Expectations
  • Integrity – Openness and Honesty with each other
  • Quality – Doing the right things and paying attention to detail
  • Initiative – Adopting a ‘can do’ solutions-driven attitude
  • Innovation – Challenging and improving the ‘status quo’
  • Accountability – Say what we’ll do and do what we say
  • Success – Achieving exceptional results through teamwork
  • Discipline – Working through agreed processes



Acquired by KnitMesh to replace its range of knitted wire Flame Arresters


Introduced our first range of crimped-ribbon Flame Arresters


Invited to sit on the European (CEN) and International (ISO) Flame Arrester Committees


Launched an initial range of weight & spring-loaded Pressure & Vacuum Relief Valves


Elmac Technologies restructured and incorporated as a subsidiary of the Greenfield Group


State-of-the-art Flame Arrester test facility built at the plant in Greenfield, United Kingdom


Range extended to include Emergency Relief Manways, Free Vents and Gauge Hatches


Range extended further to include Bursting Discs, Tank Blanketing & Breather Valves


Recruited a network of international agents to serve the growing export customer base


Developed our ‘cowhorn’ combined Arrester/Valve arrangement for specialised use in the Biogas sector


Launched the new E-Flow™ range of high flow/low pressure-drop Deflagration Flame Arresters


Computational Fluid Dynamics utilised to develop our High Energy Dissipation System (HEDS™)


Launched the patented best-in-class range of UCA Unstable Detonation Arresters

Launched the patented lightweight range of ERB end-of-line Deflagration Flame Arresters


Patented our first Endurance Burn end-of-line ETB Deflagration Flame Arrester


Launched the patented best-in-class range of UCB Unstable Detonation Arresters

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