Features/Benefits with Proper Installation:
•  Designed to protect enclosed tanks from collapse or structural damage during draining.
•  Eliminates siphoning of dangerous fluids.
•  Prevents vacuum which can cause damage to sensitive instruments and filters.
•  Normally-closed design prevents fugitive emissions from leaving system.
•  Insurance against replacement of damaged expensive equipment and avoids critical system downtime.
•  Patented diaphragm design assures dependable, repetitive, bubble-tight sealing in VBM and VB; PFA encapsulated spring and special poppet provide identical performance in VBS design.
•  For corrosive or ultra-pure liquid applications.
Sizes: ½", ¾", 1", 1½", 2" and 3".