Key Benefits and Advantages
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Accuracy of Control: The large diaphragm area provides extremely sensitive pressure control, ensuring the tank pressure is maintained within inches of water column, even at very low setpoints.
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Insensitive to Inlet Pressure Fluctuations: The balanced trim design ensures that variations in the supply pressure do not affect the regulated outlet pressure, providing a stable blanket.
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Fast Speed of Response: The direct-operated design reacts instantly to changes in tank pressure caused by liquid pump-out or thermal contraction, preventing vacuum damage.
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High Flow Capacities: Despite its precision at low pressures, the Y693 is capable of handling high flow rates to protect large tanks during rapid draw-down.
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Balanced Trim Design: This feature allows for the use of higher inlet pressures while maintaining excellent control sensitivity and reducing seat wear.
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In-Line Inspection and Maintenance: The top-entry design allows for quick inspection and replacement of internal parts without removing the regulator body from the pipeline, significantly reducing downtime.
Technical Properties
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Operation: Direct-operated pressure reducing regulator.
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Setpoint Range: Capable of controlling pressures as low as 0.5 inches w.c. (1.2 mbar).
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Material Options: Available in cast iron, steel, or stainless steel bodies to accommodate diverse chemical environments.
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Trim Materials: Various elastomer options (Nitrile, Fluorocarbon, EPDM) to ensure compatibility with a wide range of blanket gases and process vapors.
Field of Application
The Fisher Type Y693 is the preferred solution for tank padding in industries where volatile, flammable, or oxygen-sensitive liquids are stored. Its robust construction ensures reliable performance in corrosive atmospheric conditions.
Primary Industries:
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Oil and Gas: Blanketing of hydrocarbon storage tanks and process vessels.
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Chemical and Petrochemical: Protection of reactive chemicals and solvent storage.
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Pharmaceuticals: Maintaining sterile environments for ingredient storage.
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Food and Beverage: Preventing oxidation in edible oils and fruit juice silos.
