Lined Swing Check Valves: Purpose, Types & Benefits

Understanding Lined Swing Check Valves: Purpose, Types, and Alternatives

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Understanding Lined Swing Check Valves: Purpose, Types, and Alternatives

18
August

Understanding Lined Swing Check Valves: Purpose, Types, and Alternatives

By : Transflow
Date : 18 August 2025

When working with aggressive or corrosive fluids, choosing the right check valve is critical. One of the most commonly used types in such applications is the Lined Swing Check Valve. But what exactly is its purpose, and how does it differ from other check valves?

Let’s explore the frequently asked questions to understand this essential valve better.

What is the Purpose of a Swing Check Valve?

A swing check valve allows fluid to flow in only one direction and automatically prevents backflow. It operates using a hinged disc that swings open when fluid flows forward and closes when the flow reverses.

What’s the Difference Between a Swing Check Valve and a Spring Check Valve?

Here are the key differences between a swing check valve and a spring (inline) check valve:

Mechanism

Swing Check Valve: Uses a hinged disc that swings open with forward flow and closes with reverse flow.

Flow Orientation

Swing Check Valve: Ideal for horizontal pipelines.

Closing Speed

Swing Check Valve: Closes slowly, which may result in water hammer (pressure surge).

Maintenance

Swing Check Valve: Simple design with fewer components, easy to maintain.

What is Another Name for a Swing Check Valve?

Swing check valves are also known as:

Wafer check valve
Non-return valves (NRVs)

These names are often used interchangeably depending on industry and region.

Why Choose a Lined Swing Check Valve from Transflow?

At Transflow, our Lined Swing Check Valves are specially designed to handle corrosive and abrasive media. The valve body is internally lined with PTFE or other corrosion-resistant materials, ensuring long life and chemical compatibility in demanding environments like:

Chemical processing
Pharmaceuticals
Water treatment
Food and beverage

Benefits of Transflow Lined Swing Check Valves:

Excellent resistance to corrosive chemicals
Smooth operation with minimal pressure drop
Easy maintenance and installation
Cost-effective for long-term use

Conclusion:

Whether you’re comparing swing check valves vs. inline check valves or trying to understand their purpose, choosing the right type for your application is crucial. For industries dealing with harsh chemicals, lined swing check valves offer unmatched protection and performance.