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Corrosion resistance
WithCENTERLINEButterfly Valves Series VIA/RS only
2 parts of the valve come into contact with themedium.
Thismeans that neither the body nor mechanical parts
such as the shaft are subject to the danger of corrosion.
The only two parts in contact with themedium are the body
lining and the disc. These are available in a selection of
materials so that a suitable corrosion resistant combination
can be chosen for almost any application.
Permanently tight closure
CENTERLINEButterfly Valves seal absolutely liquid and
gas-tight in both flow directions due to their centric design.
The disc presseswith a defined, uniform compression into
the elastic body lining over the entire circumference of 360°.
The power transmission between shaft and disc is
accomplished by a square and enables axial movement and
automatic centering of the disc. Excess stress andwear of
the elastomer are avoided.
Elastic body lining
The replaceable body lining consists of a reinforced back-up
ring, onwhich the elastic seat material is vulcanized. When
mounting the valve between the pipe flanges this stable seat
cannot be displaced or pushed out. When the valve closes a
stretching and bulging of the elastomer in front of the closing
disc is avoided.
The fixed connection between elastomer and back-up ring
enables the application of the valve even under vacuum or
high flow velocities. The slightly protruding sealing lip of the
body lining constitutes at the same time the flange seal.
Design features
