Product Model: D343H/Y/F 

Nominal Diameter: NPS 2"~40" 

Nominal Pressure: Class150~1500Lb 

Applicable Temperature: -40～425℃ 

Main Material: WCB、CF8M、CF3

Product Overview 
The American Standard Butterfly Valve is a high-performance butterfly valve designed and manufactured according to the current American standard API 609. The valve adopts a three-dimensional eccentric (triple-offset) inclined conical seat sealing pair. The disc seal uses a new type of metal sheet embedded in the disc to match the seat. By utilizing the rotation of the disc to compress and seal, the friction resistance of the sealing surface is small. It has a "tighter as it closes" function when closing, ensuring reliable sealing performance. When opening, it ensures complete disengagement of the seal, protecting the sealing surface from damage. The main structural features of the 815W, 830W, and 860W series butterfly valves are wafer and flanged triple-offset structures, while the 815L and 830L series are characterized by a single-flange structure with tapped lugs on the valve body periphery.

Product Features

1. Simple external structure, small size, light weight, low cost, and a wide application range.
2. The structural features of this butterfly valve eliminate the shortcoming of other types of butterfly valves failing to seal when over-opened. It can be used normally at high temperatures, overcoming the defect of easy leakage due to thermal expansion when used under high-temperature conditions.
3. According to the requirements of the working medium, different sealing surface materials are selected to ensure the sealing surface is wear-resistant, erosion-resistant, and has a long service life.

Product Applications 
American Standard Butterfly Valves are widely used in metallurgy, power, petroleum, chemical, food and pharmaceutical, municipal domestic water and sewage industries, etc., for opening/closing or regulating medium flow in pipelines.