Resilient Sealed Butterfly Valves vs. Metal Sealed Butterfly Valves

Resilient Sealed Butterfly Valves vs. Metal Sealed Butterfly Valves

Lug Type Butterfly Valve

For metal-seated butterfly valves, both sealing surfaces of the valve are metal materials or other hard materials that do not seal well, but have good mechanical properties, such as high temperature resistance and resistance to wear. While one sealing surface of resilient seat butterfly valve is metal material, and the other sealing surface is non-metallic resilient material. The resilient seat has good sealing performance, but has poor mechanical properties, such as not high temperature resistance and easy wear.

Resilient seal butterfly valve has good sealing performance and can reach zero leakage, but has poor thermal adaptability and short service life. Hard seal butterfly valve has bad sealing performance and can't reach zero leakage, although some manufacturers claim that their products can do it. Metal sealed butterfly valves can be used for some corrosive media, while resilient sealed butterfly valves cannot. The two different seats can complement each other under different working conditions.

Generally speaking, the two different butterfly valves with different seats have the following differences.

1. Different structure

The resilient seat butterfly valve is of midline design, while the metal seat butterfly valve is of single eccentric, double eccentric or triple eccentric design.

2. Different sealing performance

Resilient seat butterfly valve and metal seat butterfly valve have better sealing performance. The latter can seal well under high pressure and high temperature.

3. Different pressure

Resilient-seated butterfly valves are used for low pressure and atmospheric pressure, while metal-seated butterfly valves can also be used for medium and high pressure.

4. Different suitable temperature

The resilient seat butterfly valve is used for normal temperature, and metal seat butterfly valve is used for low temperature, normal temperature and high temperature.

 

If you have any questions or concerns about butterfly valves, please contact KXC group to determine the correct valve for your application.

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