Difference between Resilient Seated Butterfly Valve and Metal Seated Butterfly Valve
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.
Triple offset butterfly valve
Both sealing surfaces of valve are metal material or other hard material, which has not so good sealing performance, but has good mechanical properties, such as being high temperature resistant and anti-wear.
Generally speaking, there are the following differences for butterfly valves of two different seats.
<1> Different Structure
Central line design for resilient seated butterfly valve while double or triple eccentric design for metal seated butterfly valve.
<2> Different suitable temperature
we use resilient seated butterfly valve in normal temperature,while Metal seated butterfly valve is used in low,normal and high temperature.
<3> Different pressure
Resilient seated butterfly valve are suitable for low and normal pressure and Metal seated butterfly valve can also suit the medium of middle-high pressure.
<4> Different sealing performance
Resilient seated butterfly valve and Metal seated butterfly valve have comparative good sealing performance. The later can seal well in high pressure and temperature.
Post time: Jan-18-2021