The Y692VB Series vacuum breakers are used in applications where an increase in vacuum must be limited. An increase in vacuum (decrease in absolute pressure) beyond a certain value registers on the diaphragm of the Y692VB Series, moving the disk away form the seat. This permits atmosphere or a positive pressure to enter the system and restore the controlled vacuum to its original pressure setting.
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Body Sizes and End Connection Styles
Cast Iron1-1/2-inch (DN 40) body size NPT end connection
2-inch (DN 50) body size NPT or 125 FF end connections
Steel or Stainless Steel
1-1/2 or 2-inch (DN 40 or 50) body size NPT, SWE, 150 RF, 300 RF, or PN 16/25/40 end connections
Hastelloy C
1-1/2 or 2-inch (DN 40 or 50) body size 150 RF end connections
Vacuum Control Pressure Ranges
1-inch w.c. to 3 psig (2 to 207 mbar) in six ranges
Temperature Capabilities
Nitrile: -20 to 180°F (-29 to 82°C)
Fluoroelastomer (FKM): 40 to 300°F (4 to 149°C)
Perfluoroelastomer (FFKM): -20 to 300°F (-29 to 149°C)
Ethylenepropylene (EPDM): -20 to 275°F (-29 to 135°C)
Silicone: -40 to 300°F (-40 to 149°C)
Additional Technical Data
For additional technical information,
contact your Local Sales Office or refer to technical documentation.
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