Pressure Relief Valves & Flame Arresters

Elmac Technologies’ Flame Arresters are static devices that allow flow into or between enclosures whilst preventing flame transmission, thus protecting processes from the potentially catastrophic effects of an explosion. Different types of Flame Arresters are required depending on installation positioning, operating conditions and Explosion Groups.

The Elmac range of Flame Arresters comprises three main types:

• In-line Deflagration Arresters
• End-of-line Deflagration Arresters
• In-line Unstable Detonation Arresters – used to prevent worst-case scenario explosions

Flame Arresters are installed by contractors, OEMs and Operators in order to provide protection against explosions in a wide range of applications including: oil & gas, petrochemicals, pharmaceuticals, bio-fuels and distilleries. Our range of ATEX accredited flame arresters and pressure relief valves is designed and manufactured in the UK and have been independently flame and explosion type-tested and certified. All flame arresters and pressure relief valves are tested to the latest EN ISO 16852, the European Standard for flame arresters which provides for a significant safety margin in typical operating conditions.

Pressure Protection

Elmac Technologies’ Low-Pressure Protection Equipment is designed to protect tanks from rupture or implosion during filling and/or emptying cycles. Pressure/Vacuum Relief Valves limit product loss and environmental discharges whilst also protecting tanks during thermal changes. Adequate pressure protection is required to stop the catastrophic failure of a tank or vessel.

The filling and emptying cycles of tanks and vessels causes change to the liquid volume and vapour space, and this together with fluctuating operating temperatures and pressures, result in the need for pressure protection equipment. Situations where a tank or vessel may be vulnerable to engulfment by fire could result in the need for large volumes of vapour to be rapidly vented in order to protect the tank and its environment. Safety devices, such as high level alarms or control systems, can malfunction, leading to catastrophic failure of the tank. This can result in critical injuries, loss of product and severe environmental damage. Accordingly, fail-safe devices, such as Pressure/Vacuum Relief Valves, Emergency Relief Vents, and/or other venting relief devices such as Bursting Discs should be fitted in addition to Flame Arresters where these may be required.