97570 Combination Conservation Vent & Flame Arrester

The Shand and Jurs Model 97570 is a combination of our 94020 Conservation Vent and 94306 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 open or closed vent (pipe-away). Standard pressure and vacuum settings are 1/2 oz./sq. in.

The 94306 not only provides exceptional protection against fire from external ignition, but also offers maximum flow capacity. The unitized tube bank provides maximum flow while minimizing pressure drop. Standard construction includes light weight cast aluminum, cast iron, cast steel, 304 stainless steel and 316 stainless steel body materials suitable for most environments. Tube bank is available in aluminum, 304 stainless steel and 316 stainless steel as standard. For highly corrosive and severe conditions, special materials and coatings are available. A complete range of sizes from 2’’ through 12’’ are available with flat face or raised face flanges to match ANSI 150 lb. connections.

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.


  • Sizes 2” thru 12” ANSI and DIN
  • 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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