97571 Combination Conservation Vent & Flame Arrester

The Shand and Jurs Model 97571 is a combination of our 94020 Conservation Vent and 94309 Flame Arrester in 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.

Continued design improvements provide the 94020 conservation vent with high efficiency, maximum flow capacity and minimum leakage. Standard materials of construction are low copper aluminum, cast iron, ductile iron, cast steel and 316 stainless steel for body materials. The conservation vent features cushion seated diaphragms constructed of FEP Teflon for reliability, and extended service life. For high reliability, the pressure and vacuum pallets are both peripherally and center stem guided. Conservation Vents are available in a full range of sizes and configurations, such as closed vent hoods (pipe-away), cryogenic hoods and flame snuffers. Standard pressure and vacuum settings are 1/2 oz./sq. in.

The Shand & Jurs 94309 Flame Arrester is designed to provide maximum flow of vapor or gas with minimal pressure drop. The extensive arrester element surface area also provides for superior burn capability. The 94309 incorporates an advanced design, which ensures precise manufacturing of the arrester components that are critical to providing superior safety products for industry. The 94309 design is completely passive which allows for flame quenching capabilities without any operational interfaces typical of active safety devices or systems. The removable tube bank provides maximum flow while minimizing pressure drop. Both body and extensible arrester element are available in numerous materials to meet the requirements of your site.

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

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


  • Cost effective, dual purpose
  • Provides pressure & vacuum relief
  • Serves as a barrier between external flame and internal vapors
  • Provides protection against flame propagation
  • Optional “all weather” coating and insulation jackets available
  • Open or closed vent configurations

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97570 Combination Conservation Vent And Flame Arrester