Double-eccentric bi-directional metal sealing flange butterfly valve

Introduction

Bi-directional metal sealing butterfly valve was researched and developed by the company in 1993, which was granted with national patents (ZL93203934.0, ZL98242105.2) twice. After continuous improvement, the product performance has been in the leading position at home and abroad. It has been listed in the national patent demonstration project and high-tech industrialization project of Henan Province. 

Features

1.With bi-directional sealing function, the sealing performance at positive and negative directions can meet the requirements above national standard Grade C. The installation is not limited by the flow direction of medium. 

2.Long service life, the sealing surface of the product is made of lCrl8Ni9Ti stainless acid-resistant steel, which is resistant to corrosion. Due to the adoption of the double-eccentric structure, the sealing pairs of the valve don’t contact with each other in the opening and closing process. Therefore, there is no wear. 

3.Wide application range, it can be used in various working conditions and in various media. 

4.Energy-efficient, the valve shaft adopts half-shaft structure, and the butterfly plate is truss type, with large open area, small flow resistance and energy saving. 

5.A connecting seat is equipped between the flange and the driving part of the valve. The bolt for fixing the packing gland can be adjusted through the packing window on the connecting seat to ensure the shaft sealing. 

6.The expansible part of the expansible bi-directional metal sealing butterfly valve can stretch freely or be fixed at certain position, which can meet the use requirements for different conditions. It has the functions of butterfly valve and the expansion piece. 

7.Worm gear drive is totally closed, which can be used in water for a long time. 

8.All butterfly valves of pipe network horizontally installed underground are equipped with unique synchronous display mechanism in the country, which can be used to observe the open and close status of the valve from different operation directions.