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Gas blanketing systems are used to prevent the escape of liquid vapors into the atmosphere or to prevent moisture from entering a tank and contaminating its contents. A tank blanketing valve maintains an inert gas blanket (usually nitrogen or carbon-dioxide) in the vapor space of a pressure-tight liquid storage vessel. This process is accomplished by utilizing a steady high-pressure gas source and the Shand & Jurs 94270 “VAPOR GUARD” so that flow is limited to a constant value when the tank pressure drops below the set point. The valve limits the minimum pressure of the gas blanketing to cope with outdoor temperature reductions or pump outs without in-breathing air.

When pressure inside the vessel exceeds the valves set point the main valve shuts off. If pressure increases due to outdoor thermal heating, or product pump- ins, the separate breather valve opens and relieves the excess pressure. One advantage of using the Shand & Jurs “VAPOR-GUARD” is that only one valve is needed to maintain precise blanketing regulation while conventional recovery systems require several regulators to achieve the same results.

FEATURES

• Lower maintenance cost due to fewer parts
• Compact/light weight design occupies less space with less stress to tank
• Eliminates the effects of valve leakage and waste of blanketing gas
• One valve system
• Horizontal or vertical mounting
• Set pressure is the only adjustment
• 316 SS trim and seats standard
• Pilot filter standard on 1” and 2’’ model
• Optional filter, check valve, pressure gauge

Website : www.ljtechnologies.com