Parallelled Back-flow Safety Valve

AHN42F type valve applies to liquefied petroleum gas pump liquid return pipe, when the pump before the pressure exceeds a predetermined value, the valve opens and plays safe from reflux role in ensuring the safe operation of equipment and piping.

Key Features:

1. Parallel Slide Mechanism: The valve disc moves in a parallel direction to the flow, allowing for smooth operation and minimal wear. This design ensures a tight seal when closed and reduces the risk of leakage.

2. Backflow Prevention: The primary function of this valve is to prevent reverse flow, which can occur due to pressure changes or system malfunctions.

3. Spring-Loaded or Weight-Loaded: Depending on the application, the valve may use a spring-loaded or weight-loaded mechanism to ensure it closes automatically when flow reverses.

4. Compact and Durable: These valves are typically compact, robust, and designed for long-term use in demanding environments.

Working Principle:

• Under normal flow conditions, the valve remains open, allowing fluid or gas to pass through.

• If the flow reverses or backflow occurs, the valve disc is forced against the seat, creating a tight seal and preventing the reverse flow.

• The parallel slide design ensures minimal resistance to flow when the valve is open and a reliable seal when closed.

Applications:

• Commonly used in pipelines, water systems, steam systems, and industrial processes where backflow prevention is critical.

• Suitable for applications involving liquids, gases, or steam.

Advantages:

• Effective backflow prevention with a reliable sealing mechanism.

• Low resistance to flow when open, minimizing pressure drop.

• Durable construction for long-term performance in harsh conditions.

Limitations:

• Requires proper installation and maintenance to ensure optimal performance.

• May not be suitable for extremely high-pressure or high-temperature applications without specialized materials.