What Is The Difference Between A Wafer And A Flanged Check Valve?
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A wafer check valve and a flanged check valve are both types of valves used to prevent the reverse flow of fluid in a piping system. However, they differ in several key aspects
1. Design and Construction
Wafer Check Valve:
Compact and lightweight, with a short face-to-face dimension.
Often has a butterfly-style disc that can close quickly.
Designed for easy installation in confined spaces due to its flat, wafer-like shape.
Flanged Check Valve:
Larger and more robust, with flanges on both ends for connection to piping systems.
Discs can vary in design, including tilting, swing, or dual-plate styles.
Provides a more secure connection due to the use of flanges and bolts.
2. Connection Method
Wafer Check Valve:
Typically connected using wafer connections, which are clamped between two flanges or piping segments.
May also be used with other types of connections, such as threaded or welded, depending on the specific design.
Flanged Check Valve:
Connected using flanges and bolts, providing a strong and reliable connection.
Standards such as ANSI, DIN, or JIS may be followed for flange dimensions and bolt patterns.
3. Application and Usage
Wafer Check Valve:
Often used in horizontal or vertical piping systems where space is limited.
Suitable for a wide range of media, including water, oil, and other fluids.
Available in various sizes and pressure ratings to meet specific application requirements.
Flanged Check Valve:
Used in larger piping systems where a more secure and robust connection is required.
Suitable for high-pressure and high-temperature applications.
Often found in industrial settings, such as refineries, chemical plants, and power stations.
4. Performance Characteristics
Wafer Check Valve:
Generally has a lower pressure rating compared to flanged check valves.
Quick-closing action helps to prevent backflow and reduce water hammer.
Flanged Check Valve:
Offers higher pressure and temperature ratings.
More durable and suitable for harsh environments.
Can provide a tight seal even under extreme conditions.
