Choosing
the wrong type of valve can be detrimental to your operation. There are a
few different types of butterfly valves on the market, including the offest/eccentric and concentric butterfly valve .
Center line butterfly valve is widely used in
water treatment and other industries, because of it’s advantages: light weight,
small size and easy for installation, low cost. But thanks to it’s design, it’s
limited in many cases, and offset/eccentric butterfly valve could help. Below
are some basic difference between center line butterfly valve and offset
butterfly valve.
3. The sealing of center
line is also simple, the disc touch the rubber seat directly, while eccentric
butterfly valve with a additional laminated disc seal touched with a meat body
seat.
4. Eccentric butterfly
valve seat is meat while center line butterfly is only soft seat, could be
integral body seat or replaceable welded seat.
Application.
2. Center line butterfly
valve can only reach a pressure of 150LB/PN25, while offset butterfly could up
to 600LB/PN100.
3. Temperature. Because of
the different design of the seal structure, the center line rubber seat can’t
bear a high temp, but offset butterfly valve could work with hard seal design.
The advantages and
disadvantages are apparently, and very easy to choose which one to use for a
real condition. When the pressure is high, or requires a high temperature, must
used a eccentric butterfly.
Our Variety triple eccentrice butterfly valves:
