Fisher™ Type ACE95 Tank Blanketing Valve

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Fisher ACE95 and ACE95Sr Tank Blanketing Valves
Tank blanketing is a process that uses an inert gas—commonly nitrogen—to maintain a slightly positive pressure inside an enclosed storage tank. This controlled pressure environment helps prevent product vapor loss, reduces combustibility, and protects the stored product from oxidation or contamination by minimizing exposure to air. Tank blanketing is critical in industries handling adhesives, pharmaceuticals, pesticides, fertilizers, fuels, inks, food additives, and other sensitive materials.

Precision Pressure Control for Blanketing Applications
The Fisher ACE95 and ACE95Sr valves are self-contained, fully balanced, pilot-operated devices specifically engineered to deliver accurate pressure regulation in tank blanketing systems. These valves help reduce emissions and protect product integrity by preventing exposure to ambient conditions.

Both types maintain positive internal tank pressure, thereby minimizing the risk of tank wall collapse during pump-out and preventing the vaporization of stored liquids. The ACE95Sr variant features an angled-body design available in 2" NPT, CL150 RF, or CL300 RF configurations and has a taller profile than the ACE95.

Features and Benefits
• Pilot-Operated Accuracy – Offers exceptional pressure control and response.
• Balanced Pilot Design – Maintains precise setpoints despite inlet pressure fluctuations.
• Large Actuator Diaphragm – Enhances responsiveness to slight changes in tank pressure.
• Rolling Diaphragm Pilot – Minimizes friction, improving control sensitivity and accuracy.
• Diagnostic Port – Allows in-field performance evaluation for efficient maintenance.
• Low-Temperature Construction – Available for applications down to –49°F (–45°C).
• Specialized Materials – Configurations available for sour gas service or other aggressive media.
• Sanitary Design Option – Models available with FDA/USP Class VI and ADI-free elastomers for hygienic applications (wetted parts only).

Optional Accessories
• Inlet Pressure Gauge – Displays incoming blanketing gas pressure.
• Control Pressure Gauge – Monitors tank (control) pressure at low ranges.
• Purge Meter (Rotameter) – Maintains minimal gas flow to prevent corrosive vapors from damaging upstream components.
• Pressure Switch – Enables integration of alarms for high or low tank pressure conditions.
• Outlet Check Valve – Prevents reverse flow of vapors into the blanketing system.
• Diagnostic Gauge – Facilitates real-time analysis of valve performance for simplified troubleshooting.
• Single Array Manifold (SAM) – Connects both sensing and main lines through one tank nozzle (not compatible with In-Line connections).

Operating Principle
The ACE95 and ACE95Sr regulate vapor space pressure above stored liquids. As liquid is removed from the tank or vapor condenses, internal pressure drops. This change is sensed by the large actuator diaphragm, which moves downward when pressure falls below the setpoint, opening the pilot valve. This allows loading pressure to enter the system, which in turn opens the main valve, introducing blanketing gas into the tank.

When tank pressure rises above the setpoint, the diaphragm moves upward, causing the pilot to close. The loading pressure then equalizes with the inlet pressure, prompting the main valve to shut off. The balanced pilot design ensures outlet pressure remains stable, unaffected by variations in inlet pressure.

Specifications

Body Sizes
• Angled Body: NPS 3/4 or 1 / DN 20 or 25
• In-Line Body: NPS 3/4 or 1 / DN 20 or 25 or NPS 1 x 2 / DN25 x 50

End Connections Styles
• NPT, CL150 RF, CL300 RF, PN16/25/40, Sanitary Flange

Maximum Inlet Pressure
• 200 psig / 13.8 bar

Outlet Pressure Ranges
• -5 inches w.c. to 1.5 psig / -12 to 0.10 bar

Pressure Registration
• External

Temperature Capabilities
• NBR: -20 to 180°F / -29 to 82°C
• FKM: 0 to 212°F / -18 to 100°C
• EPDM: -20 to 212°F / -29 to 100°C
• FFKM: -20 to 212°F / -29 to 100°C

Approximate Weight (with all accessorries)
• 40 Pounds / 18 kg

Additional Technical Data
• For additional technical information, contact your local Sales Office or refer to technical documentation.

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Data Sheets: ACE95 and ACE95Sr Tank Blanketing Valves Bulletin, Fisher-EN.pdf  

Data Sheets: Pressure Equipment Directive (PED) Classification Guide for Regulator Products Bulletin, Fisher-EN.pdf