●Description: A butterfly valve is a valve which can be
used for isolating or regulating flow. The closing mechanism takes the form of
a disk. Operation is similar to that of a ball valve, which allows for quick
shut off. Butterfly valves are generally favored because they are lower in cost
to other valve designs as well as being lighter in weight, meaning less support
is required. The disc is positioned in the center of the pipe, passing through
the disc is a rod connected to an actuator on the outside of the valve.
Rotating the actuator turns the disc either parallel or perpendicular to the
flow. Unlike a ball valve, the disc is always present within the flow,
therefore a pressure drop is always induced in the flow, regardless of valve
position.
● Standards:
Design:
EN 593, API 609.
Face
to Face: EN 558-1, series 20.
Flange:
BS EN 1092, ANSI B16.5.
●Materials: Ductile iron, cast iron
●Nominal sizes: DN80—300mm
●Pressure: PN6/10/16
●Corrosion protection: Inside and outside FBE.
●Suitable medium: Water, oil, steam.
●Package: wooden case with plastic layer, wooden pallets
with plastic layer, steel crates.
●Features：
Inside
& outside fusion bonded epoxy coating
Ductile
iron construction design
Replaceable
lining materials
Bubble
tight
Ease
of operation
Long
service life and no frequent maintenance
Multifunction
