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Information about different types of butterfly valve
2011-03-01
A
butterfly valve is a kind of valve that is primarily used to isolate or
regulate the flow. In this type of valve, a disk like mechanism is used
to do the closing. Though the operation conducted by butterfly valve is
quite similar to ball valve, but it is generally a more preferred
option due to its low cost and it is lighter in weight. The metal disc,
which is held by the rod is called the butterfly and the disc is turned
when the valve closes thereby completely blocking the passageway. Lists different types of butterfly valves
There are undoubtedly different types of butterfly valves where each of
the types are meant to cater to different pressures and serve
distinctive purposes. Concentric Butterfly valves are a kind of valves
that feature a strong and a robust rubber seat with a metallic disc.
Double Eccentric Butterfly valves are also known as high performance butterfly valves and in preparing this type of valves different kinds of materials are used for both the disc and the seat.
The
third type of valve is called Triple Eccentric Butterfly Valves that
are also known as Triple Offset Butterfly Valves and in this kind of
valve the seats consists of metal or are laminated. The butterfly valves
feature different kinds of mounting methods such as wafer-style
butterfly valves and lug-style butterfly valve. In the first instance,
the butterfly is designed in a manner that it maintains a seal against
the bi-directional pressure to avoid backflow. In the second instance
the valves contain threaded inserts at both the sides of the valve body.
Materials and features of Butterfly Valve The kind of
materials used in creating butterfly valves are extremely important
because that would determine the kind of performance it would deliver.
Therefore
butterfly valve manufacturers in India such as GM Engineering take
special care to ensure the right kinds of materials are used to create
these valves. GM Engineering uses C.I. WCB, CF8 and CF8M ETC materials
to develop the body of the butterfly valve. The body liner is made from
Nitrile, EPDM, VITON and PTFE and the disc contains 13% cr., ss 304, ss
316.
Application of Butterfly Valve Butterfly valve is
used quite extensively in various different fields. Butterfly valves are
extensively used in most gas, air, steam and liquid applications.
Butterfly valve distributors realize the advantages of using this type
of valve as it is not only economically priced but is also lightweight,
bi-directional and bubble-tight.
