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.