Double Offset Butterfly Valve
Aarya Sales supplies double offset butterfly valves in India, also known as high-performance butterfly valves, designed for enhanced sealing and extended service life in demanding industrial applications.
Spherical Disc High Performance Butterfly Valve – Class 150
Off-Set Disc Design Butterfly Valve Wafer Type
Spherical Disc High Performance Butterfly Valve – Class 300
Double Flanged Butterfly Valve
Metal Seated Wafer Type Butterfly Valve
Fabricated Butterfly Valve
In this design, the valve stem is offset from both the disc centerline and the valve body centerline, creating a cam-like motion. This allows the disc to lift away from the seat during operation, significantly reducing friction, wear, and operating torque.
The double offset design ensures a tight, reliable seal, improved durability, and suitability for high-pressure and high-temperature applications. Sourced from trusted manufacturers, these valves are widely used in industries such as oil & gas, power generation, water treatment, and process plants, offering efficient performance and long-term reliability.
Double Offset Butterfly Valve Supplier in India — Aarya Sales
Double-offset (high-performance) butterfly valves position the disc's seating axis offset from both the shaft centreline and the bore centreline, lifting the disc off the seat immediately on opening. This eliminates the constant seat friction of concentric valves, enabling higher pressure ratings and longer seat life. Aarya Sales supplies double-offset butterfly valves in sizes 50 NB to 1200 NB, Class 150# to Class 300#.
Disc materials: Carbon Steel, SS 316, Duplex. Seat materials: PTFE, RPTFE, metal-seated variants for higher temperature. Standards: API 609, BS 5155. Suited to process, refinery, and higher-pressure industrial service where concentric valves are unsuitable.
Frequently Asked Questions
A double-offset (high-performance) butterfly valve offsets the disc's sealing axis from both the shaft centre and the pipe bore centre. This geometry lifts the disc away from the seat as soon as the valve starts to open, avoiding the continuous rubbing contact seen in concentric designs — resulting in lower operating torque, less seat wear, and suitability for higher pressure classes.
A concentric valve's disc rubs against the seat throughout the entire stroke, limiting it to low pressure and shorter seat life. A double-offset valve's disc only contacts the seat at the final degrees of closing, which is why it can achieve Class 150#/300# ratings with PTFE or metal seats, versus PN 16 max for typical concentric rubber-lined valves.
PTFE and Reinforced PTFE (RPTFE) seats for standard process service, and metal seats (SS/Stellite-faced) for high-temperature steam or abrasive service where soft seats aren't suitable.
We supply double-offset butterfly valves from 50 NB to 1200 NB, in Class 150# and 300#, to API 609 and BS 5155 standards, in Carbon Steel, Stainless Steel, and Duplex body/disc combinations.