Not everyone is really aware about the usage and importance of metallic expansion bellows. Being a highly technical term to the industry, Vallabh Engineers decided to unveil the mystery about metallic expansion bellows.

1. What are Expansion Bellows- The Mystery Unveiled
Not everyone is really aware about the usage and importance of metallic expansion bellows. Being a
highly technical term to the industry, Vallabh Engineers decided to unveil the mystery about metallic
expansion bellows.
What are expansion Bellows?
Metallic expansion bellows, or metallic expansion joint for pipe systems are most commonly
manufactured out of stainless steel. This is to ensure that they are highly durable, can take a lot of heat
and remain in good condition for a longer time. Expansion bellows are also made out of plastic, fiber or
rubber. The material ordinarily depends on the purpose of the expansion bellow.
How are Expansion Bellows made?
Wikipedia states “ A bellow is made up of a series of one or more convolutions, with the shape of the
convolution designed to withstand the internal pressures of the pipe, but flexible enough to accept the
axial, lateral, and/or angular deflections.” In simpler words, bellows are created in such a way that they
can handle the pressure on the inside of the pipe. Nonetheless, they should also be flexible enough to
move either way.
Why are Expansion Bellows used?
In most cases, expansion bellows are used to absorb movement and vibration in the process of transfer
of high temperature commodities like steam, exhaust gases etc. However, expansion bellows are also
used for other alternative purposes like noise absorption, anti-vibration, earthquake movement and
building settlement.
Expansion Bellows are auxiliary to any heavy duty, or high pressure processes. They are used in order to
minimize the by-products or the process.
Accessories for Expansion Bellows
Now that we know the what, how and why of metallic expansion bellows, let’s look a little deeper. What
are the accessories needed in order to efficiently use expansion bellows.
1. Liners: Internal liners are used and needed for reducing use based erosion of the bellow as well
as to reduce the turbulence across the bellows during use.
2. Covers: Temporary or permanent, covers are used to avoid damage to the bellows. They also
serve the purpose of insulating the bellows.
3. Particulate Barriers or Purge Connectors: Particulate Barriers are used to avoid ceramic fiber
from corroding the bellows. Particulate collection causes a restriction in the flexibility of the
bellows. This purpose is also met by the purge connectors. The purge connectors are often
included in the design of the liners.

2. 4. Limit Rods: As the name suggest, the limit rods are used to restrain the bellows from expanding
more than their capacity.
Vallabh Engineers only use the best raw material for the manufacturing of their metallic expansion
bellows and their accessories. One can rest assured that with Vallabh engineers, one will only receive
the best!
Visit For More information
www.vallabhengineers.com