Eccentric butterfly valves

Eccentric butterfly valves are advanced flow control devices widely used in industrial piping systems due to their compact design, reliability, and superior sealing performance. Unlike concentric butterfly valves, which have the stem centered in the disc, eccentric butterfly valves feature an off-center stem configuration—typically single, double, or triple offset. This design minimizes friction between the disc and seat during operation, significantly reducing wear and extending service life.

The eccentric mechanism allows the disc to cam into the seat gradually, ensuring a tight shutoff even under high-pressure conditions. This makes them ideal for applications involving steam, water, oil, and gas in industries such as power generation, petrochemicals, and water treatment. Triple eccentric valves, in particular, offer metal-to-metal sealing with zero leakage, meeting stringent standards like API 609 and ISO 5211.

Additionally, eccentric butterfly valves require lower operating torque, enabling the use of smaller actuators and reducing energy consumption. Their robust construction, often with stainless steel or carbon steel bodies and resilient or metal seats, ensures durability in harsh environments. With features like fire-safe design and bidirectional sealing, eccentric butterfly valves represent a versatile and efficient solution for modern flow control challenges.