Pressure Relief Device – Spring Orient F84/F85

Flow Safe, Inc.

Overpressure protection for gas/vapor service compliant with ASME Section XIII
Precision-machined components for high-quality performance
Plastic seat design that provides zero leakage
Available in various material configurations
Adjustable blowdown capabilities for precise control of reseat characteristics

The Flow Safe F80 Series safety valves are high-performance state-of-the-art, cost-efficient, high capacity, soft-seated valves designed to meet the critical needs of today’s industry. This series includes Models F84 (plastic seat) and F85 (O-ring seat), with a pressurized spring chamber and unbalanced against backpressure. Bubble-tight shutoff is achieved through the use of an elastomeric (F85) or plastic (F84) seat. The F80’s use a compression spring that opposes system inlet pressure acting on the valve’s effective seat area (F = P x A), to establish the set pressure. When system pressure overcomes the spring preload, an initial escape of fluid called “simmer” occurs past the seat. As simmer continues, there is a significant pressure buildup within the huddling chamber that eventually forces the valve to pop open.

Use Cases

Overpressure protection in industrial applications
Cryogenic applications
Applications requiring compliance with ASME Section XIII for gas/vapor service
Typically used in hydrogen and related industrial applications

Capabilities

Zero leakage due to plastic seat design
Reliable overpressure protection
Adjustable blowdown capabilities
Capacity-certified by the National Board
Suitable for various material configurations

Flow Safe, Inc. Flow Safe is a manufacturer of high-quality pressure relief valves and accessories, crucial for safe hydrogen handling in the energy transition. It operates in New York and Texas. Flow Safe supports the hydrogen economy by ensuring safe, efficient hydrogen transport and storage.

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