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 Iron
NPS 1-1/2, NPT
NPS 2 (DN 50), NPT or CL125 FF
Steel or Stainless Steel
NPS 1-1/2 or 2 (DN 40 or 50), NPT, SWE, CL150 RF, CL300 RF, or PN 16/25/40
Hastelloy® C
NPS 1-1/2 or 2 (DN 40 or 50), CL150 RF
Pressure Registration
Type Y692VB: Internal
Type Y692VBM: External
Maximum Allowable Inlet Pressure
1-3/16-inch (30 mm) Orifice: 13 psig (0,9 bar)
3/4-inch (19 mm) Orifice: 30 psig (2,1 bar)
Vacuum Control Pressure Ranges
1-inch w.c. to 3 psig (2 to 207 mbar) in six ranges
Temperature Capabilities
Nitrile (NBR): -40 to 180°F (-40 to 82°C)
Fluorocarbon (FKM): 40 to 300°F (4 to 149°C)
Perfluoroelastomer (FFKM): 0 to 300°F (-18 to 149°C)
Ethylenepropylene (EPDM): -20 to 275°F (-29 to 135°C)
Silicone (VMQ): -40 to 400°F (-40 to 204°C)
Additional Technical Data
For additional technical information, contact your Local Sales Office or refer to technical documentation.
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