Double Offset Butterfly Valve

IO Valves Double Offset Butterfly Valves are engineered for isolation and flow control in large diameter pipelines. The double offset disc design reduces seat wear during operation, resulting in low operating torque, extended service life, and reliable sealing performance.

Key Features

• Double Offset design minimising seat wear

• A dry hub design with multiple O-rings isolates the shaft and bearings from process media and external moisture, ensuring smooth operation and consistently low operating torque throughout the valve’s service life

• Arch shape disc design ensures larger flow area, stable flow, minimised head loss and low energy consumption

• Self-lubricating bearings minimises static friction coefficient which provides lower operating torque

• At non drive end tail opening ring is used as a plane bearing to bear the axial force of the steam due to which it can be mounted horizontally and vertically.

Typical Applications

High-Performance Valves for Large Diameter Pipelines

Design & Testing StandardsDrinking water distribution networks

• Design Standard: EN 593 | IS 13095

• Face-to-Face: BS EN 558 Series 13 & 14

• Flange Drilling: EN 1092-2

• Testing: EN 12266-1

Size Range DN 200 – DN 2400

Pressure Rating PN 10/PN 16

Transmission Mains

Water Treatment Plants

Pumping Stations

Industrial & Utility Pipelines

Material of Construction

Body : Ductile Iron GGG 50

Disc : Ductile Iron GGG 50

Shaft : Stainless Steel SS 420

Body Seat Ring : SS 304

Weld Overlay Retainer Ring : SS 304

Seat : EPDM

Bearings : Tin Bronze

Coating : Epoxy Powder Coating ≥ 250 m

RESILIENT SEATED GATE VALVE

IO Valves Double Offset Butterfly Valves are engineered for isolation and flow control in large diameter pipelines. The double offset disc design reduces seat wear during operation, resulting in low operating torque, extended service life, and reliable sealing performance.