Difference between Resilient Seated Butterfly Valve and Metal ...

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

If you want to learn more, please visit our website Disai.

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.

U type butterfly valve pneumatic

Because the resilient seated butterfly valve has rubber lined body and seat,the tightness is excellent and always zero leakage.

but it&#;s not suitable for high temperature and easy to wear,which results in shorter life,compared to the Metal seated butterfly valves.

And it&#;s not suitable for high pressure medium.

The metal seated butterfly valve,is usually designed with triple offset.it&#;s including the wafer triple offset,lug triple offset,flanged triple offset and buttweld triple offset.

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.

May 18,

For more information, please visit Metal Seated Gate Valve.

Before the resilient seated gate valve was introduced to the market, gate valves with a metal seated wedge were widely used. The conical wedge design and angular sealing devices of a metal seated wedge require a depression in the valve bottom to ensure a tight closure. Herewith, sand and pebbles are embedded in the bore. The pipe system will never be completely free from impurities regardless of how thoroughly the pipe is flushed upon installation or repair. Thus, any metal wedge will eventually lose its ability to be drop-tight.

A resilient seated gate valve has a plain valve bottom allowing free passage for sand and pebbles in the valve. If impurities pass as the valve closes, the rubber surface will close around the impurities while the valve is closed. A high-quality rubber compound absorbs the impurities as the valve closes, and the impurities will be flushed away when the valve is opened again. The rubber surface will regain its original shape securing a drop-tight sealing.

The vast majority of FEIDAVALVE's gate valves are resilient seated, however metal seated gate valves are still requested in some markets, so they are still part of our range for water supply and wastewater treatment.

FEID AVALVE is the top ranking China double offset butterfly valve manufacture. The annual output of high performance butterfly valve is more than 100,000,000 set.

The API 607 fire safe high performance butterfly valve is also in FEIDA VALVE product range. Our fire safe butterfly valve is certificated by American Petroleum Institute (API) according to API 607 standards.

FEIDA also build up a dustless workshop to produce ultra-clean valve for some critical working condition such as nuclear industry, semiconductor industry etc.

In the dustless workshop, FEIDA also produce the food-grade valves. FEIDA food-grade valve is certificated by Food and Drug Administration United States (FDA).

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