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.
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Body Sizes
3/4 or 1-inch (DN 20 or 25)
Material Temperature Capabilities
Nitrile (NBR): -20 to 180º F (-29 to 82ºC)
Fluoroelastomer (FKM): 40 to 300ºF (4 to 149ºC)
Ethylenepropylene (EPDM): -20 to 275ºF (-29 to 135ºC)
Perfluoroelastomer(FFKM): -20 to 300ºF (-29 to 149C)
Additional Technical Data
For additional technical information,
contact your Local Sales Office or refer to technical documentation.
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