Butterfly valves,have compact structure,simple design,good performance,and easy maintenance.

They are one of the most popular industrial valves.

We normally have resilient seated butterfly valves,or rubber lined butterfly valves. In this catagory, we have wafer rubber lined butterfly valves,lug rubber lined butterfly valves,U type rubber lined butterfly valves and double flange rubber lined butterfly valves.

In the process of opening and closing, the ball valve operates under the holding force of the valve seats at both ends. Compared with the semi-ball valve, the ball valve has larger opening and closing torque. And the larger the nominal diameter, the more obvious the difference of opening and closing torque. The opening and closing of the butterfly valve is realized by overcoming the deformation of rubber. However, it takes a long time to operate gate valves and globe valves and it is also laborious to do that.

Ball valve and plug valve are of the same type. only the ball valve has a hollow ball to control flow through it. Ball valves are mainly used to cut off, distribute and change the flow direction of the medium in pipelines.

What Are Resilient Seated Butterfly Valve and Metal Seated Butterfly Valve?

For a butterfly valve with a metal seat, both sealing surfaces of the china valve are metal material or other hard material. They do have not such a good sealing performance but have good mechanical properties, such as being high temperature resistant and anti-wear. While, for resilient seated butterfly valve, one sealing surface is made of metal material and the other sealing surface is made of non-metal resilient material. The resilient seat has good sealing performance, but poor mechanical properties, such as not being high temperature resistant and easy to wear.

The butterfly valve has good sealing performance and can reach zero leakage, but it has poor thermal adaptability and serves a short life. The hard seated butterfly valve has not had good sealing performance and can’t reach zero leakage. Though some manufacturers declare that their products can do. Metal seated butterfly valve can be used in part corrosive medium, but Resilient seated butterfly valve can't. The two different seats can complement each other in different working conditions.

Good Quality Ductile Iron Resilient Seat OS&Y Gate Valve

Differences between Resilient Seated Butterfly Valve and Metal Seated Butterfly Valve

1. Different pressure

It is used in low and normal pressure. A Metal seated butterfly valve can also be used in middle-high pressure.

2. Different sealing performance

It is a metal seated butterfly valve that has comparative good sealing performance. The latter can seal well in high pressure and temperature.

3. Different Structure

The butterfly valve with resilient seats is of the central line design and the Metal seated butterfly valve is of a single, double or triple eccentric design.

4. Different suitable temperature

A resilient seated butterfly valve is used in average temperatures. While a Metal seated butterfly valve is used in low, normal, and high temperatures.