The double eccentric butterfly valve, often referred to as a high-performance butterfly valve, is highly regarded for its minimal maintenance demands. Its primary application extends to the drainage systems of water plants, power plants, steel manufacturing, the chemical industry, water source engineering, environmental facility construction, and various other sectors. Particularly well-suited for water pipelines, this double eccentric butterfly valve serves as both a regulation and interception tool. As a double eccentric butterfly valves supplier, we provide long-lasting double eccentric butterfly valves known for their dependability, having met the stringent ISO standards.

 

Butterfly valves are valves which control the flow with the 90°angle turning of the disc. DISAI butterfly valves are double eccentric and rubber sealing ring is kept in place by single piece retaining ring. This design ensures 100% sealing and makes it possible to change the sealing ring without special equipment and dismantling of any parts other than retaining ring.

WORKING PRINCIPLE

The eccentric principle is that the stem shaft is both deviated from the valve body center,also deviated from the seat. The double eccentricity effect allows the butterfly plate to quickly detach from the valve seat when the valve is opened, greatly eliminates unnecessary excessive

Disai Double Eccentric Butterfly Valve PRODUCT FEATURES

-Variable choice of actuators.

-Bi-directional tightness.

-Drop tight shut-off at rated pressure.

-Suitable for isolation and control service.

-Maintenance free design.

-Low operating torque requirement.

-Easy installation.

-Light weight and smaller volume requirement.

-WRAS approval for potable water.

What is the difference between double eccentric butterfly valve, triple eccentric butterfly valve and zero eccentric butterfly valve?

Double eccentric butterfly valve have two offsets and are available in carbon steel, stainless steel, Hastelloy and other ANSI Class 600 rated body materials, with a variety of PTFE seats and fireproof designs with metal backed seats. Double offset butterfly valves are suitable for a wide range of applications, including high pressure and high temperature environments.
 have three eccentricities and are designed for demanding applications with high pressure, high temperature and corrosive fluids.
Zero-eccentric butterfly valves have no offset and are suitable for low pressure, cryogenic and general-purpose applications where tight shutoff is not important.

 

PRODUCT RANGE

-DESIGN: EN593

-SIZE RANGE: DN200-DN4000

-Face to face dimension according to EN558-1, series 13/14

-Flange connection according to EN1092-2 PN10 PN16 PN25 PN40

-Valve top flange according to ISO5211

-Closed clockwise

-Internal&External epoxy coating

-For medium drinking water, water, and sewage

-Bidirectional

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