Vacuum breakers protect enclosed tanks from collapse

Series VB/VBM vacuum breakers from Plast-O-Matic have a Patented diaphragm design said to assure dependable, repetitive, bubble-tight sealing to protect enclosed tanks from collapse or structural damage during draining.

The vacuum breaker units also eliminate siphoning of dangerous fluids, the company says, and prevent vacuum damage to sensitive instruments and filters.

Sizes include 1/2, 3/4 and 1 in. in a wide range of materials and connection types. The normally-closed design can be mounted in any position; however, upright is recommended. For enclosed tank applications, mounting should be at the highest point of the tank.

Series VBM vacuum breakers are molded of type 1, grade 1, PVC, glass-filled polypropylene, Kynar PVDF and Corzan CPVC. A machined version, series VB is available in PTFE in sizes 3/4 and 1 in. Threaded or socket connections are standard on all models.

Series VBS PFA encapsulated spring and special poppet provide performance identical to VB/VBM with same protection for tanks and piping systems against hazards, damage and financial losses caused by unwanted vacuum conditions.

Sizes from 1-1/2 to 4 in. are available in a wide range of materials and connection types.