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Shand & Jurs Expanda-Seal™

Shand & Jurs Expanda-Seal™
Shand & Jurs offers a uniquely designed seal, named Expanda-Seal™, which uses tank pressure to inflate the gasket. This design actually uses the internal vessel pressure to create a tighter seal the closer the pressure gets to the set point.

Shand & Jurs 94020 Conservation Vent (Pressure/Vacuum) with Expanda-Seal™ Pallet

To reduce emissions, Shand & Jurs designed and patented a high performance valve sealing technology called Expanda-Seal™, which offers reduced tank emissions and odors for every process environment imaginable. This innovative design actually uses the internal vessel pressure to create a tighter seal the closer the pressure gets to the set point. Expanda-Seal™ ensures less than 0.5 SCFH air at 95% of the set point; the end result is a nearly bubble-tight seal.

Features and Benefits
  • Significantly Reduces Emissions and Odors Patented Unique Design
  • Less Than .5 SCFH @ 95% of Set Point
  • Best Available Control
  • Technology for Low Pressure
  • Retains Valuable Product
 
When pressure inside the tank is below the set point, the deflated diaphragm rests on the seat ring in a typical manner, as with any normal valve, retaining internal pressure.
 
As the pressure approaches set point, the Expanda-Seal™, diaphragm inflates and wraps around the mating seat to achieve this unique sealing effect.
 
When the pressure in the tank is at or above set point, the valve lifts to relieve the overpressure.

Specific requirements for refinery fugitive emissions are identified in:
  • EPA Fugitive Emissions Clean Air Act
  • 40 CFR Part 60
  • 40 CFR Parts 61 and 63
  • New Source Performance Standards (NSPS)
  • National Emission Standards for Hazardous Air Pollutants (NESHAP)
  • API 653
  • API 2521
  • API 2000
  • OSHA Section 1910, NFPA 30
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