Selecting The Right Product

Which product do you need?

To help you choose the product you need, the tables below list Elmac Technologies^® product ranges and show which general functions and features they provide.

End-of-Line Deflagration Arresters

End-of-line deflagration arresters are designed to be installed at the end of a pipeline or exit vent from a vessel, where the ignition source is external, to provide protection against atmospheric deflagration.

In-Line Deflagration and Detonation Arresters

In-line deflagration arresters are designed to prevent propagation of flames in gas or vapour mixtures. By locating the arrester in close proximity to the potential source of ignition, any flame or explosion is confined to the immediate area.

Unstable detonation arresters are designed to prevent propagation of detonations in gas or vapour mixtures. Detonation arresters are specifically designed for pipelines with a significant distance between the ignition source and the arrester, or for use where the pipe is rough, bent, obstructed or has section changes.

End of Line Deflagration Arrester for use with Pressure/Vacuum Relief Valves

FE-IE series end-of-line deflagration arresters are designed to be used in conjunction with pressure/vacuum relief valves, to prevent propagation of flames in gas or vapour mixtures. FE-IE arresters are specifically designed to be located below the inlet of a pressure/vacuum relief valve, thereby providing an extra layer of tank protection.

Pressure/Vacuum Relief Valves (Breather Valves)

Pressure / vacuum relief valves (also known as breather valves, conservation vents, or safety vents) are used extensively on bulk storage tanks, including fixed roof tanks with floating covers, to minimise evaporation loss. The valves prevent the build up of excessive pressure or vacuum which can unbalance the system or damage the storage vessel.

Emergency Relief Vents & Access Manways

Emergency relief vents permit access to low pressure storage tanks and provide emergency venting in the event of fire. Non-sparking, low pressure access manways offer easy entry to low-pressure storage tanks for maintenance and cleaning.

Table 5. Emergency Relief Vents & Access Manways - Size Ranges

Gauge Hatches

Gauge hatches allow easy access to atmospheric liquid storage tanks for manual level measurement (dipping), temperature measurement and sampling. Gauges can also be combined with a pressure/vacuum relief mechanism, or free vent to offer various levels of pressure relief protection.

Table 6. Gauge Hatches - Size Ranges

Free Vents

Free vents are designed for use on any atmospheric tank to prevent the build-up of internal pressure, by allowing atmospheres and vapours to flow freely in tanks or vent riser pipes.

Table 7. Vent - Size Ranges

Tank Blanketing Valves

Tank blanketing valves offer complete protection to the storage tank product against contamination and to the storage tank itself against rupture or damage. In addition to preventing outside air and moisture from entering the storage vessel, a blanket gas pressure reduces the evaporation of the stored product to a negligable amount.

Table 8. Tank Blanketing Valves - Size Ranges

Arrester Elements

Spare arrester elements are available for many of the Elmac Technologies^® end-of-line and in-line deflagration and detonation arresters. Although it is hoped that an element never need be replaced due to a deflagration or detonation event, it is often useful to have a spare element for times such as routine maintenance, when elements can be easily swapped out to minimise plant down-time.

Bursting Discs

Bursting Discs (or rupture discs) are used to protect plant, pipework, and vessels from high levels of overpressure and vacuum. Elmac Technologies offers a range of bursting discs for different applications and mountings.

Disc types available include forward acting, reverse acting, scored, inverted, insulated, and dual-pressure rated. Product selection is based upon a number of contributing factors. Go to the bursting disc product page for more information.

Pressure & Temperature Sensors

Monitoring flow conditions (temperature, pressure etc.) within a flame arrester can not only provide a source of useful process information, but data streams can also be incorporated into safety systems to detect possible element blockages (indicated by unexpected pressure differentials) or stabilised burning conditons (indicated by unexpected temperature rises).

Elmac in-line deflgration and detonation arresters have options for the inclusion of process monitoring equipment such as thermocouples and pressure transducers.

Still not sure which product you need?

Our Customer Services team is just a phone call away.

If you are still not sure which product you need, or have a query about specific options or requirements, or would like some more advice, please do not hesitate to get in touch with our Customer Services team. Details are shown on the left of this page.