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Technologies
  • E-FLOW™
    E-FLOW™
    Elmac’s E-Flow™ stands for Enhanced-Flow, the technology that’s used in the majority of our end-of-line and in-line flame arresters. Read More
  • HEDS™
    HEDS™
    Elmac Technologies’ High Energy Dissipation System (HEDS™) is used on our globally renowned range of in-line detonation flame arresters. Read More

UCA Series Flame Arresters

Features & Benefits
  • Suitable for unstable detonation, stable detonation and deflagration
  • Offers comprehensive explosion protection solution without need for additional protection measures
  • Exceptional flow capacities with minimal pressure drop
  • Short-time burn capability
  • Bi-directional protection
  • High performance facilitates lower on-going operating costs
  • Lightweight for ease of installation and maintenance
  • Easy-clean, replaceable, crimped-ribbon elements
  • Sizes and materials to suit wide range of applications
  • End connections include flanged or threaded options
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Technologies
  • E-FLOW™
    E-FLOW™
    Elmac’s E-Flow™ stands for Enhanced-Flow, the technology that’s used in the majority of our end-of-line and in-line flame arresters. Read More
  • HEDS™
    HEDS™
    Elmac Technologies’ High Energy Dissipation System (HEDS™) is used on our globally renowned range of in-line detonation flame arresters. Read More

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Principles of Operation

The Elmac Technologies®  UCA Series of In-line Unstable Detonation Flame Arresters are designed to prevent the propagation of gas or vapour explosions in pipelines under the most severe condition of unstable detonation. This type of arrester is specified for use in pipeline systems where the distance between the source of ignition and arrester is significant and/or where detonations are possible.

The combination of our unique patent pending High Energy Dissipation System (HEDS™) design and E-Flow™ technology elements attenuate the shock wave and extinguish the flame, thus mitigating the effects of an explosion by preventing its propagation. The UCA Series Flame Arrester uses an optimised crimped ribbon element which allows gas or vapour to pass through with minimal pressure drop. Designed to withstand the extreme pressures that travel at supersonic velocities in a detonation event; the UCA Series has been developed in line with Elmac’s long-standing policy regarding the provision of the utmost safety, for the protection of both plant and personnel, whilst maintaining market leading flow performance.

Explosion Groups

Elmac UCA Series Unstable Detonation Flame Arresters are ATEX certified for gases in Explosion Groups IIA1 and IIA.

Standards Compliance

Elmac Flame Arresters are manufactured in accordance with EN ISO 16852 and approved to ATEX Directive 2014/34/EU.

Enviromental Management
Quality Management
EX
CE

General Layout

UCA Series Flame Arresters drawing

UCA Series - Dimensions & Operating Limits

 Maximum operating pressure
(bar(a))
Maximum operating temperature(°C)Size NB (mm)
≤ 506580100150200250300350400
Overall length
A (mm)
1.10+6064174913201385
+15013201385
1.20+604515755816399011035
1.40+150471585591649
1.50+60585591649
1.60+60471
Diameter
ØD (mm)
2292542793434835976988139281062
Centre to top of temperature probe(short-time burn models)
(mm)
285300315340340402585635
Approx Wt (kg)304457871532744206299771366
The UCA series flame arresters are short-time burn rated for protection against stabilised burning. Please contact Elmac with details of your requirement.

UCA Series - Options and Variations

FeatureStandard Fitting Options*
Arrester Housing MaterialsCarbon Steel or Stainless SteelLow Temperature Carbon Steel, Duplex Steel, Hastelloy
Element Material316L Stainless SteelHastelloy
ConnectionsANSI 150 Flange PN16 Flange, Female BSP/NPT, Male BSP/NPT
Arrester FinishPainted (Carbon Steel Arresters)Offshore Paint, PTFE Coated, Others on Request
Sensors (short-time burn option)Installed on one side (uni-directional) or both sides of element (bi-directional)Thermowell to protect sensor from process
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