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Home | Regulators | Y690A Series Gas Blanketing Regulators

Y690A Series Gas Blanketing Regulators

Y690A Series Gas Blanketing Regulators The Y690A Series Gas Blanketing Regulator System reduces a high-pressure gas, such as nitrogen, to maintain a protective environment above any liquid stored in a tank or vessel. The regulator system replaces the volume of vapors with a volume of blanketing gas to prevent the internal vessel pressure from decreasing, when liquid is being pumped out or when the vessel is suddenly cooled, causing vapors to contract. In both cases a slight positive vessel pressure prevents outside, air, moisture and other contaminants from entering the vessel. The Type Y690A is a direct-operated regulator used for accurate pressure control on very low-pressure blanketing systems. Downstream pressure is sensed through a pitot tube installed in the lower casing of the regulator, thus no external control line is required. The Type Y690AM uses a control line to more accurately control the pressure if the regulator is mounted away from the tank.

  • Easy Conversion Between Constructions
  • Sour Gas Service Capability
  • Inlet Pressure Equals Outlet Pressure
  • Corrosion Resistance
  • Multiple Applications
Body Sizes
NPS 3/4 or 1 (DN 20 or 25)

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

Maximum Outlet Pressure (Casing)
150 psig (10,3 bar)

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

Material Temperature Capabilities
  • Nitrile (NBR): -20 to 180º F (-29 to 82ºC)
  • Fluorocarbon (FKM): 40 to 300ºF (4 to 149ºC)
  • Ethylenepropylene (EPDM): -20 to 275ºF (-29 to 135ºC)
  • Perfluoroelastomer(FFKM): -20 to 300ºF (-29 to 149C)
Pressure Setting Adjustment
Adjusting Screw

Spring Case Connection
1/4 NPT

Diaphragm Case Connection
1/2 NPT

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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