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Home | Regulators | Y690VB Series Vacuum Breaker

Process Gases Regulators

Y690VB Series Vacuum Breaker

Y690VB Series Vacuum Breaker The Y690VB Series vacuum breakers are used in applications where an increase in vacuum must be limited. When there is an increase in vacuum (decrease in pressure) beyond the setpoint on the diaphragm, it moves the disk away from the seat. This permits atmosphere or a positive pressure to enter the system and restore the controlled vacuum to its original vacuum pressure setting.

The Type Y690VBM has a control line connection and O-ring stem seal for external pressure registration.

  • Common Spare Parts
  • Tamper-Resistant Adjustment
  • Easy Conversion
  • Precision Control of Low-Pressure Settings
  • Corrosion Resistance
Body Sizes
NPS 3/4 or 1 (DN 20 or 25)

Maximum Allowable Inlet (Positive) Pressure
150 psig (10,3 bar)

Maximum Outlet (Casing) Pressure
Full Vacuum

Maximum Emergency Outlet Pressure to Avoid Internal Parts Damage
150 psig (10,3 bar)

Spring Case Connection
1/4 NPT

Orifice Size
1/4-inch (6,4 mm) or 1/2-inch (13 mm)

Pressure Registration
  • Type Y690VB: Internal
  • Type Y690VBM: External
Material Temperature Capabilities
  • Nitrile (NBR): -20 to 180°F (-29 to 82°C)
  • Fluorocarbon (FKM): 40 to 300°F (4 to 149°C)
  • Ethylenepropylene (EPDM): -20 to 275°F (-29 to 135°C)
  • Fluoroelastomer (FKM): -20 to 300°F (-29 to 149°C)
Approximate Weight
19 pounds (9 kg)

For general enquires contact us at (+64) 9 634 1391 or by email at sales@customcontrols.co.nz

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