Triple Eccentric / Fire Safe Butterfly Valves

The Fouress Triple Eccentric Butterfly Valve is a high integrity Butterfly Valve, which is particularly suitable for a variety of arduous applications. Basically, such valves can be classified into three categories.

• Fire safe to API 607

• High temperature

• Other critical applications

A Triple Eccentric Fire Safe Butterfly Valve is not intended for use at high temperature during normal operation. It only has to withstand a fire and retain its sealing integrity after the fire, for a short period of time, after which the valve may be refurbished. The fire-safe testing in accordance with API 607 is a mandatory requirement for such critical applications. Conversely, a valve designed to operate continuously at elevated temperature need not necessarily conform to the fire-safe requirements. Fire-safe valves are normally installed in pipelines carrying hydro-carbons and other flammable liquids or gases. The line fluid is generally at temperature around ambient, an the function of the valve is to prevent leakage could fuel a fire external to the valve. One of the major difference between the Fouress design and the other types of fire-safe valves, is the valve remains intact even after being exposed to fire. It does not rely on components melting and disintegrating allowing secondary seals to come into use.

“High temperature” Butterfly valves are designed to suit specific applications and particular attention is given to the selection of the correct materials for the duty involved. The term “high temperature” in context of Butterfly Valves covers the range of temperature above which traditional resilient sealed valves operate (Maximum recommended operating temperature are aprox 1000C for Nitrile Rubber, and 2000C for Viton).

The third category of Butterfly Valves is for critical applications where for some specific reasons the use of resilient valve seals id precluded. Typical uses would be pipeline carrying solvents or other chemicals, and liquids or gases containing corrosive particles.

These high technology Triple Eccentric Butterfly Valves are designed and manufactured at our Bangalore Plant and have gone through the process of development over 5 years at our R & D dept. This product is breakthrough in butterfly Valve design, which is not only certified as fire – safe but can also be used continuously at elevated temperature up to 700°C.