Vacuum butterfly valve is a kind of valve which is used to connect or cut off pipes in vacuum system. In the course of use, the vacuum butterfly valve has the following problems: 1. The multi-layer soft and hard stacked sealing ring is fixed on the valve plate, and when the valve plate is normally open, the medium forms a positive scour to its sealing surface, which affects the sealing performance; 2. Due to the limitation of structural conditions, the structure is not suitable for making valves with sizes below DN200. 3. The seal between the sealing surface of the valve plate and the valve seat depends on the torque of the transmission device to press the valve plate to the valve seat. When the flow channel medium is countercurrent, the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, the seal begins to leak.

Company profile

Hebei Huafeng Industrial Group Co., Ltd. is a large-scale joint-stock enterprise transformed from Hebei Huafeng Machinery Factory, which was originally affiliated to China North Industries Group Corporation Limited. It has total assets of 250 million yuan and covers an area of 300000 square meters. It is located in Songlindian Town, Zhuozhou City, Hebei Province, adjacent to 107th National Highway, Beijing-Guangzhou Railway and Beijing-Shijiazhuang Expressway, Langfang-Zhuozhou Expressway, Zhangjiakou-Zhuozhou Expressway, convenient transportation and communication and broad space for development.
The company was founded in May 1966 and was reorganized in February 2002. The company is committed to the development of transmission and distribution and control equipment, special equipment, heat exchange equipment, structural metal products manufacturing, as well as metal surface treatment and other manufacturing industries. The subsidiary company, which is dedicated to the production of transformer supporting products: chip radiator, cooler, fan butterfly valve and so on, is one of the important production bases of transformer components in the country. Specializing in the production of transformer chip radiator, air cooler, fan, butterfly valve, pressure relief valve, flow indicator and other components, many varieties, complete models, excellent quality, marketing dozens of transformer manufacturers, exported to South Korea and Southeast Asia and other countries.

Enterprise honor

Product display

Various structure forms of butterfly valve

Cap structure	Cap structure	Pressure plate rotating sleeve structure
Rotating sleeve structure	Butterfly valve	Perforated butterfly valve
Nylon lock structure	Stainless steel lock structure	Opposite edge butterfly valve

Product parameters

BDB series plate butterfly valve

Φ 25, Φ 40, Φ 50, Φ 80 plate butterfly valves

Φ 50, Φ 80 continuous box cover plate butterfly valve

Φ 50, Φ 80 continuous relay plate butterfly valve

Φ 80 butterfly valve with tube plate

Φ 25, Φ 40, Φ 50, Φ 80 plate round butterfly valves

Φ 100, Φ 125, Φ 150, Φ 200, Φ 250, Φ 300, Φ 350 plate butterfly valves

Φ 125, Φ 150, Φ 250, Φ 300 continuous box cover plate butterfly valves