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Plast-O-Matic VBS Series PVC Vacuum Breaker Valve, For Corrosive and Ultra-Pure Liquids, , 3" NPT Female .

Plast-O-Matic VBS Series PVC Vacuum Breaker Valve, For Corrosive and Ultra-Pure Liquids, , 3" NPT Female?Compact, self-closing vacuum breakers protect against hazards, damage and financial losses caused by vacuum. 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. Insurance against replacement of damaged expensive equipment, avoids critical system downtime. Patented diaphragm design assures dependable, repetitive, bubbletight sealing in VBM; PFA encapsulated spring and special poppet provide identical performance in VBS design. For corrosive or ultra-pure liquid applications. VBS Vacuum Breakers feature a corrosion resistant PFA encapsulated spring which acts on a poppet seal that neither sticks nor chatters. Maximum working pressure is 100 PSI at 75 degree F. Threaded connections are standard on all models. Socket end connectors are available on all sizes and materials except PTFE VB. Outlet connection is shipped with standard dust cap. Cap is removable for applications where pipe connection is desired due to location, potential hazard, etc. The outlet connection is identical to the connection on the system side of the valve. These Vacuum Breakers will begin to break a vacuum at approximately 2" of mercury (1.0 PSI or 0.07 Bar negative pressure). Full vacuum is 29" of mercury. For applications either draining or pumping from enclosed tanks, the tanks must be able to withstand much more than 2" of mercury of vacuum, as illustrated in the chart below. The chart is based upon a 3.5 times safety factor, and it clearly shows that as the rate of liquid flow leaving the tank increases, the resulting vacuum in the tank also increases. Vacuum Breakers can be mounted in any position since they are self-sealing and do not rely on gravity to operate; however, upright is preferred.

Plast-O-Matic VBS Series PVC Vacuum Breaker Valve, For Corrosive and Ultra-Pure Liquids, , 3" NPT Female?

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