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AVA Series - End Of Line Deflagration Flame Arrestors

Home » Products » End of Line Arrestors » AVA End of Line Flame Arrestor

End of line flame arrestor AVA Series

End of Line Deflagration Arrestor with Replaceable Element

Application

The Elmac Technologies® AVA series end-of-line deflagration arrestors 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.

Principle of Operation

A flame arrestor uses an element with small apertures which allows gas or vapour to pass. If the apertures are smaller than the maximum experimental safe gap (MESG) for the gas or vapour then a flame cannot pass through the arrestor, and is subsequently contained or extinguished.

Benefits

  • Large variety of sizes and materials to suit a wide range of applications
  • Variants available for different operating temperature ranges
  • Options available for sour environments
  • Optional weatherhood
  • Replaceable elements
  • The Elmac technical team can advise on specific location queries

Gas Groups

Elmac flame arrestors in the AVA range are for use with gases in Groups I and IIA.

General Layout

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  1. Weatherhood
  2. Element housing
  3. Element core
  4. Gasket
  5. Body Ring
  6. Fasteners
  7. Reducer
  8. Fixing flange

Material Specifications

Table 1. AVA Series Material Specifications
RefCarbon Steel ModelsLow Temp Carbon Steel ModelsStainless Steel ModelsHastelloy Models
1Stainless or Mild SteelStainless SteelStainless SteelHastelloy
2Carbon SteelLow Temp Carbon SteelStainless SteelHastelloy
3Stainless SteelStainless SteelStainless SteelHastelloy
4Klingersil C4400Klingersil C4400Klingersil C4400Klingersil C4400
5Carbon SteelLow Temp Carbon SteelStainless SteelHastelloy
6Carbon SteelStainless SteelStainless SteelHastelloy
7Carbon SteelLow Temp Carbon SteelStainless SteelHastelloy
8Carbon SteelLow Temp Carbon SteelStainless SteelHastelloy

Dimensions

Table 2. AVA Series Unit Dimensions
NB (mm)1520253240506580100125150200250300350400
Ø Element (mm)109109109140140166193220280349401508612716826926
Ø A (mm)17817817822322325525530037045051065080095011001240
B (mm)137139133156156175219223259306337544726767852927
Approx Wt (kg)2.62.63.54.15.06.69.514233243120170285393445

Operating Limits

Table 3. AVA Series Operating Limits
NB (mm)Gas GroupMin Service Temp (°C)Max Service Temp (°C)
15 to 200IIA-20+150
250 to 400IIA-20+60

Pressure Drop & Flow Curves

Pressure drop information and flow curve charts for the AVA Series arrestors can be found in the AVA product datasheet in the Data Centre.

Variations

The AVA series of end of line flame arrestors has the following options:

  • Flange fixing (ANSI 150, or PN16)
  • Female fixing (BSP/NPT)
  • Male fixing (BSP/NPT)
  • Optional weatherhood
end of line variations jpg

Standards Compliance

All flame arrestors have been tested and certified in accordance with national or international standards. Actual device performance is verified in the Elmac Technologies "state of the art" in-house test facility.

Elmac Technologies has been independently assessed by a notified body against the requirements of the ATEX Directive 94/9/EC. Elmac flame arrestors meet the criteria and are supplied with CE and EX markings, an EC Declaration of Conformity and an EC Type Examination Certificate.

standards jpg

Quick Links:

AVA Series Data Sheet (in data centre)
End of Line Flame Arrestors
Elmac Expertise
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Elmac Technologies specialises in the manufacture of Flame Arresters and supply of Pressure Relief Equipment.
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