The D373H multi-level structure butterfly valve by Onn Valve Co., Ltd. epitomizes engineering excellence with its advanced three-dimensional eccentric design. The butterfly plate's sealing pair is crafted from a range of high-temperature and corrosion-resistant materials, ensuring unparalleled durability and performance.
Constructed through meticulous lamination and pressing processes, the valve's body sealing surface is fortified with Stellite alloy welding and precision machining. With face-to-face contact between the sealing pairs, the valve guarantees a flawless seal.
Engineered to withstand erosion, the innovative eccentric structure minimizes friction between the sealing surfaces. This design marvel offers the following exceptional benefits:
1. Remarkable resistance to high temperatures, corrosion, and erosion, coupled with an extended lifespan.
2. The three-dimensional eccentric structure ensures effortless opening and closing, with an airtight seal when closed, achieving zero leakage at the bubble level.
3. The replaceable sealing pair on the butterfly plate ensures easy maintenance and prolonged operational efficiency.


Onn Valve Co., Ltd. offers comprehensive valve maintenance and troubleshooting training; provides remote or on-site technical guidance for valve review, installation, and operation. Customer technical inquiries are addressed within 24 hours. An 18-month product warranty is standard, with 24-hour technical support available. During warranty, enjoy free after-sale services and a lifetime of support, including limited free supply of wearing parts for 18 months.