double eccentric butterfly valve


The Double EccentricDouble Flange Butterfly Valve is one important kind of Water Works Valves. Themain function of butterfly valve is to control fluid flow rate in pipeline:turn gear box or other actuator, the disc will rotate; lock the disc at the specifiedangle by locking device; the fluid flow rate depends on the disc angle; whenthe disc is turned 90to the valve bore center line, the pipeline is cut off. The ductile iron bodybutterfly valves are widely used in industry of potable water, sewage, and seawater. Considering different connecting ends, the Water Work Butterfly Valve isclassified in Wafer Type Butterfly Valve, Lug Butterfly Valve, and flange butterfly valve, etc.According different material, it’s classified in ductile iron GGG50 GGG40butterfly valve and Stainless Steel Butterfly Valve.As well as manual butterfly valves, we can also provide Pneumatic Butterfly Valve and motorized butterflyvalve.


BasicDesign: EN593, API609, AWWA C504

Face toFace: ISO5752 and EN558-1 Series 13 Series 14, API 609

ConnectingEnds: EN1092-2, ASME B16.5, ASME B16.47 A

Test:EN12266-1 Rating A, API 598

Design Feature:

DoubleFlange Ends



Horizontalor Vertical Installation

LessFriction between Disc and Seat

Size Range: DN200to DN3000 or 8” to 120"

Pressure Class: PN10,PN16, PN25 or Class 125 Class 150


Body:Ductile Iron GGG50, GGG40, ASTM A593

Disc:Ductile Iron, Stainless Steel CF8 CF8M, Duplex Stainless Steel, Bronze

Shaft:SS416, SS431, F304, F316, F51

Bushing:PTFE or Bronze

DiscSeal Ring: EPDM, NBR

BodySeat: SS304 or SS316


Gear,Electric Actuator, Pneumatic Actuator


Stem Extension, WRAS Approved FBE Coating & Rubber