Tank blanketing is a process used to maintain a gas blanket in the vapor space of a pressure-tight liquid storage vessel.
Anderson Greenwood Crosbyting is a process used to maintain a gas blanket in the vapor space of a pressure-tight liquid storage vessel. Gas blanketing is used to reduce fugitive emissions, eliminate combustion potential, and/or avoid product contamination. This process is usually accomplished using a high-pressure gas source and a valve to reduce the pressure to a lower value. The blanketing valve limits the minimum pressure of the blanket cover in order to prevent collapse of the vessel due to pump-out or atmospheric cooling, without admitting outside air. When pressure in the vessel exceeds the set point of the Anderson Greenwood Crosbyting valve, it shuts off. If the pressure continues to increase due to atmospheric thermal heating or pump-in of product, the safety relief vent opens and relieves the excess pressure.
Anderson Greenwood Crosbyting provides an inert gas blanket over the liquid in a liquid storage tank. The company's Trans-Zero Regulator is a pilot operated, dome-loaded diaphragm type regulator capable of reducing blanketing gas from 14 barg to 12.5 mm wc in a single step providing bubble-tight shut off and low maintenance costs.
- Connections: ½ in., 1 in., 2 in. threaded (NPT) and flanged ANSI 150, 300, 600
- Temperature Range: -20°F to +300°F [-29°C to +149°C]
- Maximum Inlet Pressure: 200 psig [14 barg]
- Blanket Pressure Range: 0.5 in. wc to 6 psig [12.7 mm wc to 0.4 barg]
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