94470 Combination Conservation Vent and Deflagration Flame Arrester

The Shand and Jurs 94470 Combination Conservation Vent and Deflagration Flame Arrester is a single, easy to configure package providing for pressure and vacuum relief, as well as positive flame stop on low pressure tanks containing flammable liquids or solvents having a low flash point.

The conservation vent features cushion seated diaphragms constructed of FEP for reliability and extended service life. For high reliability, the pressure and vacuum pallets are both peripherally and center stem guided.

The unitized tube bank provides maximum flow while minimizing pressure drop. Both body and tube banks are available in numerous materials to meet the requirements of your site.

Temperature monitor device available. Consult Factory.

Shand & Jurs “Expanda-Seal” option is available on all pressure pallet assemblies. This feature significantly reduces leakage. The ballooning effect of the FEP diaphragm effectively seals the valve.

The “Expanda-Seal” feature ensures less than .5 SCFH of air at 95% of the set point.


  • ISO 16852 Approved
  • ATEX EN 12874 approved
  • Cost effective, dual purpose
  • Provides pressure & vacuum relief
  • Serves as a barrier between external flame and internal vapors
  • Provides protection against flame propagation
  • Open or closed vent configurations
  • Sizes 2” (50 mm) thru 12” (300 mm) ANSI, EN1092-1, JIS
L&J Technologies or any of it’s subsidiaries assume no responsibility and shall not be liable for any damage, injury or death caused by the mis-application or improper installation of the products that it provides. Installation shall be per manufacturer’s instructions in accordance to any applicable local, state or federal regulations. It is the responsibility of the purchaser to ensure these guidelines are followed and that the products are applied properly.

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