Compact, Self-Closing Vacuum Breakers - Normally Closed

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 avoids critical system downtime.
• Patented diaphragm design assures dependable, repetitive, bubble-tight sealing.

For corrosive or ultra-pure liquid applications. Protect against hazards, damage and financial losses caused by vacuum.

Materials Of Construction: Series VBM Vacuum Breakers are molded of type 1, grade 1, PVC (Polyvinyl Chloride), Glassfilled Polypropylene in sizes 1/2", 3/4" and 1" and Kynar/ PVDF in 1/2". A machined version, Series VB is available in PTFE in sizes 3/4" and 1". Diaphragms are of Buna-N, EPDM, or Viton. VBS Vacuum Breakers are available in standard PVC (Polyvinyl Chloride), Natural Polypropylene, and Kynar PVDF in sizes 1 1/2", 2", and 3". Standard dust caps on PVDF models are natural polypropylene; PVDF is optional. Seals are Buna-N, EPDM, or Viton. Threaded connections are standard on all models. Socket end connectors are available on Series VBM models in PVC and all VBS designs.

Design:The Plast-O-Matic VBM Vacuum Breakers have only one moving part - the patented selfsealing diaphragm, and this provides both design simplicity and maximum operating dependability. This normally-closed design seals in the identical location every time producing a very dependable, long-life seal. Series VBS Vacuum Breakers feature a corrosion resistant PTFE PFA encapsulated spring which acts on a poppet seal that neither sticks nor chatters. Maximum working pressure is 100 PSI at 75°F (6.9 bar at 24°C).